Xinxiang Great Wall Steel Casting Corporation: "Casting" going out create "new ID"

It is the sixteenth Chile Mining Machinery and Equipment Exhibition ("Chile Exhibition " for shot ) when the 45th anniversary of the diplomatic relations between China and Chile. Great Wall Steel Casting Corporation as a well-known large-scale steel casting manufacturer shined in Chile Exhdibition by our "good quality, reasonable price, fast delivery "and other advantages, become one of the most popular exhibitors in the hall. Especially retaled principals of the world's largest copper company visited and negotiated, which gives Great Wall Steel Casting Corporation more space and confidence to go abroad to the world.

　　In the new normal economic development of China, the Great Wall Steel Casting Corporation will arrange overseas markets comprehensively, "going out" both to actively develop the overseas market, and research in-depth to meet the user’s superior needs, create high-quality and high-end brands, conquer overseas markets.

　　“Going-out” advantages win market

　　2015, Great Wall Steel Casting Corporation increased resources to expand and research overseas markets. We established the international trade department composed of integrated talents -Foreign languages team understanding of western culture, Technique team ; Meanwhile we expand marketing ways and innovate marketing services. combining with import and export trading companies. Major products access to markets like Europe and America in the first quarter. we get good news from abroad and gain orders.

　　With superior product performance and brand, Great Wall Steel Casting Corporation attracted many customers from abroad to visit the factory and signed purchase contract of castings. Recently, Great Wall Steel Casting Corporation signed a contract of six sets of large slag pot with a German customer. Three slag pots customized by American customer will be shipped today ... series of exciting news sounds the trumpets Great Wall Steel Casting Corporation is seizing the international market share, which inspires the staff of the Great Wall.

　　Today, Great Wall Steel Casting Corporation as an major large casting steel export enterprise, the products are exported to over 50 overseas countries and regions including Japan, Korea, Europe and Americas.

　　“Going-out” profession leads to breakthrough

　　Large steel castings are widely used in many industrys due to the flexibility of its process design, the strongest variability of metallurgy and other advantages. Great Wall Steel Casting Corporation, as a large steel castings manufacturer, can not only provide high-quality large steel products, but also large finished steel castings’ solutions for the users.

　　In order to meet the customer's individual needs, Great Wall Steel Casting Corporation can supply technical solutions from the material of steel castings, mechanical properties, testing standards, painting models and others demand, providing customers based on the local situation. Great Wall’s steel castings bulk export around the world, even won the recognition of overseas users because of customized products and services.

　　“Going-out” high quality win customer’s trust

　　China large steel castings made by Great Wall Steel Casting Corporation has been popular in overseas markets. In the just-concluded Chile Exhibition, a dealer from overseas said local users very recognize and trust on the "Great Wall" brand. The advantages of the Great Wall steel castings are "variety, high quality, fast delivery." "variety"- as China's leader manufacturer of Steel Castings, Great Wall process a variety of steel castings, customize products according to customers’ drawing; "High quality"-strict process ensure the overall quality of castings and prolong their service life; "fast delivery"- Just-in-time processing mode ensure ontime delivery. That is praised by our customers.

　　One important reason for our customers’trust is products’ high quality, From overseas customers’ comments, we see the Great Wall Steel Casting Corporation representing China castings' image, is going abroad and won the world's attention and praise.

　　Xinxiang Great Wall Steel Casting Corporation has carried out technical innovation since founded. The quality of products get improved. Thus, Xinxiang Great Wall Steel Casting Corporation gradually possess our own market. Today, ‘Xinxiang Great Wall’ will amaze the world by our products and technical strength, create high-end image of " China Castings".

Made in China 2025--the new opportunity for the development of Great Wall Steel Casting

The State Council recently issued the "Made in China 2025", which is endorsed by prime minister Keqiang Li, deploy the all-round implementation of manufacturing power strategy. "Made in China 2025" identified 9 strategic tasks and emphasis. As basis of manufacturing, the casting industry will also have earth-shaking changes.

First, the upgrading of product structure is in urgent need of putting into practices. Whether business innovation, brand building, or penetration of high-tech products, all need the support of high-end steel castings, Great Wall Casting as a leader in the foundry industry, has made new development in the field of middle and high-end products with years’ development and reform. In the current economic situation, casting factories are facing a very serious economic situation. Therefore, only by timely upgrade product structure, can it cater to the current situation trend of made in China 2025.

Second, green manufacturing is the highest frequency vocabulary in recent years, also be raised again in” Made in China 2025”, therefore, the transformation and upgrade of environmental technology is an important aspect need to improve continuously for industrial developing. Under the circumstances that the current foundry enterprises are located relatively fragmented and the majorities are small and medium-size, so system management is always a big problem for the industry. Therefore, green casting will become the main tone of foundry industry in the next five years. Foundry enterprises should actively carry out technological innovation, weed out backward production methods, and take the road of green casting.

Third, the top 10 key areas for deepening development put forward by “Made in China 2025”, just are the places supported by foundry industry, coupled with its added value is high, and the dosage is bigger, all of these has bring enterprises an infinite profit margin.

In short, under the police” Made in China 2025”, there are both opportunities and challenges in foundry industry. The enterprises only by keeping a policy direction well , developing the technology and upgrading products, can get the opportunity, and keep an invincible position in the industry. As the leading manufacturer of large-scale steel casting, Great Wall Casting will seize new opportunities and create more space for future development.

We committed to casting industry to create a global brand

Recently, at the twelfth session of the National People's Congress group discussion, Tieli Duan, the representative of NPC, recommends "national strategy that well-known brands to create national strategy ", which means that many companies will casting a global brand.

　　As an economic power, our country must be to develop into an economic power, and the brand is a sign of economic power. Although global marketing are made in China, but many areas are facing have no brand products, in particular the lack of well-known international brands. Many products have no suitable brand name, what does it mean?

　　Casting is one of the main methods of obtaining rough mechanical products, is an important foundation for the mechanical engineering industry, and plays a very important position in the national economy. In many machines, casting weight accounted for a high proportion of the whole weight: metallurgy, cement machinery, building materials industry, utilities bridges will need to more significant type of high-quality steel castings. The development of the industry will go to stagnate or even fall behind, if technology of China's foundry industry is immature, so the brand building in steel castings field is essential.

　　As an enterprise with the independent brand, specializing in the production of steel castings, conform to the development needs of the current era. Great Wall Casting constantly updates technology and products, and are making efforts to create a world-renowned brand for China.

Great Wall Casting: good professional slag pot recommended strongly by Mittal Group

It’s well known, slag pot is the necessary equipment during steel-making of the metallurgical enterprises, it is used for filling the high temperature slag and liquid steel during steel smelting process, and there are 2 lifting trunnions on the both sides of the bowl vessel. At present the existing problems of common slag pots in the market are backward technology, short using lifetime, large quantity scrap, these cause direct economic losses to customers and more cost of repeating purchasing.

As a professional large slag pot casting plant, Great Wall Casting Company adopts the most advanced casting technology and software system to ensure the casting period of our slag pot casting is able to within 45 days, average using time is 600-800, life time is much longer than the others in the market, and we adopt integral type casting technology to make our slag pots have strong non-deformability. The global largest steel company—Mittal group has set up long-term cooperation with Great Wall Company. As soon as mentioning our slag pot, they always nod frequently to praise us, and recommend our steel castings to the other local steel companies.

Relying on the advanced product property and brand advantage, Great Wall Casting Company has won the support and trust from many of our customers, then, let Great Wall Company lift the mysterious veil to show you why Great Wall casting slag pots are welcomed so popular. 

1.100 pcs /annual P.O. quantity

The largest steel company—Mittal group has continuously placed orders to purchase over 100 pcs slag pots per year from us for many years, at present Great Wall Company is appointed the long-term strategic partner of Mittal Group.

2.600—800 times using frequency

The using lifetime of general slag pot is 450—600 times, but Great Wall Company is able to ensure 600—800 using times, the first maintaining time is postponed 2-3 months compare with the other products in the same industry. 

3.UT Level 2 standard

Great Wall Casting Company implements non-destructive test for each slag pot utilizing the advanced UT and MT instruments, the key position of slag pot is able to reach UT level 2 standard. 

4.More than 50 countries have purchased the customized slag pots from us.

Slag pots are the competitive products of Great Wall Company, they have obtained domestic and overseas market deputation due to our higher grade, more accurate and more advanced casting technology. According to the customer’s request we are able to manufacture the customized and suitable slag pots, so far they have been exported to more than 50 countries including the United States, Canada, Mexico, Germany, Turkey, India, South Korea, Japan, Russia.

Great Wall Casting Company pursues internationalization strategy

Recently, it is very happy for Great Wall Casting Company about several good news, shortly after the shipment of 8 sets of over 400 tons slag pots for Mittal group, our company receives 6 sets of slag pots purchase order from the German customer again. As the representative of domestic large slag pot manufacturers, Great Wall Casting Company is striving for the higher business goal, never stop the chasing and moving forward steps.

In the great exceeding trend of the world and rapid economic integration today, only via speeding up the steps to cooperate with the international first class enterprises, can we stand in an invincible position in the increasingly fierce peer competition. The crisis awareness on the Great Wall leaders conference can be felt everywhere, it is just the long-term development concept that Great Wall Company becomes an “ever-victorious general " in the steel casting industry.

If the implement of "take staff as the foremost, make everyone as the operator" system was the landmark of the first development of Great Wall cast steel, then the internationalization strategy is undoubtedly the second totem of enterprise development.

Under the guidance of such internationalization thought, the Great Wall cast steel began to adjust its strategic positioning, and made the business strategy “ enhance the casting value by excellent quality, build the world's most trusted casting enterprise”.

In the days after, The Great Wall cast steel insists on setting the domestic and overseas markets at the same strategic height, same position and synchronous development level. It will continuously consolidates the industry leader status, and increases the cooperation and exchange with the world class enterprises, develops by standing on the shoulder of the giant, Accelerate the realization of the enterprise shock span from the "big casting country" to the "strong casting country".

Exact strategic positioning urged Great Wall Company to open the development curtain of the Great Wall Company internationalization development process:

In 2008, successfully became the slag pot supplier of the global largest steel company Mittal Group.

In 2011, started the cooperation with the world's oldest franchise cement factory machinery and equipment company Danish FLSmidth and supplied various specifications grinding rollers of the vertical roller grinding mills.

In 2014, obtained the first purchase order from Italian famous ceramic press machinery manufacturer, opened the door of the European upper and down crossing beams market.

In 2015, the German customer ordered 6 sets of slag pots, enhanced Great Wall slag pot  market share in Europe, and enlarged European market further. 

Nowadays, the internationalization road of Great Wall Company is more and more broad, it forms a linkage between the upper and lower group, the initiative as a good situation to implement the plan, and presents a vivid scene of seeding roundly and blossoming timely. The internationalization development strategy makes the Great Wall cast steel achieve the leapfrog development. At present, the company has become one of the fifty comprehensive strength enterprises, “the provincial advanced enterprise ", it is also the member of China Foundry Association. In the future, The Great Wall cast steel will continuously adhere to the new development philosophical concepts, “customer as the center, staff as the center, quality as the center”, keeps leading in the field of high-end manufacturing industry.

50 years of Great Wall history

Xinxiang Great Wall Steel Casting Corporation turn over a new leaf

It is the sixteenth Chile Mining Machinery and Equipment Exhibition ("Chile Exhibition " for shot ) when the 45th anniversary of the diplomatic relations between China and Chile. Great Wall Steel Casting Corporation as a well-known large-scale steel casting manufacturer shined in Chile Exhdibition by our "good quality, reasonable price, fast delivery "and other advantages, become one of the most popular exhibitors in the hall. Especially retaled principals of the world's largest copper company visited and negotiated, which gives Great Wall Steel Casting Corporation more space and confidence to go abroad to the world.

In the new normal economic development of China, the Great Wall Steel Casting Corporation will arrange overseas markets comprehensively, "going out" both to actively develop the overseas market, and research in-depth to meet the user’s superior needs, create high-quality and high-end brands, conquer overseas markets.

2015, Great Wall Steel Casting Corporation increased resources to expand and research overseas markets. We established the international trade department composed of integrated talents -Foreign languages team understanding of western culture, Technique team ; Meanwhile we expand marketing ways and innovate marketing services. combining with import and export trading companies. Major products access to markets like Europe and America in the first quarter. we get good news from abroad and gain orders.

With superior product performance and brand, Great Wall Steel Casting Corporation attracted many customers from abroad to visit the factory and signed purchase contract of castings. Recently, Great Wall Steel Casting Corporation signed a contract of six sets of large slag pot with a German customer. Three slag pots customized by American customer will be shipped today ... series of exciting news sounds the trumpets Great Wall Steel Casting Corporation is seizing the international market share, which inspires the staff of the Great Wall.

Today, Great Wall Steel Casting Corporation as an major large casting steel export enterprise, the products are exported to over 50 overseas countries and regions including Japan, Korea, Europe and Americas.

GRMS vertical roller mill grinding powder to satisfy the concrete application

Blast furnace slag is discharged during smelting iron. It can be divided into steel-making pig iron slag, casting pig iron slag, ferromanganese slag etc. The lower of mineral taste, the larger of slag discharge quantity. Although our country has rich mineral source, the taste is not high. That’s the reason why the slag output amount of steel factories in China is so large. It’s said that our usage of slag start lately, but now it has been popularized. Especially after the quickly developing of GRMS slag vertical roller mill and other manufacturing equipment, the application becomes more widely.The powders can effectively improve the application function of concrete.

　　Slag macadam can replace the nature stones and be used in the roads, airport, ground engineering, railway ballast, concrete aggregate and bituminous pavement etc. It can be used in slag gravel preparation, soft ground application. The bituminous pavement use slag macadam not only brightness, have good non-skid property, but also have good wear resisting property. When it is used in railway ballast, it can reduce the vibration and noise produced by train walking.

　　Our country usually produce the blast furnace slag to water slag, slag macadam, expanded slag and slag bead etc. Water slag is put the hot melt state slag put into the water and cooling quickly. The mainly two ways are slag pool water quenching and water quench before furnace. Water slag can be used in the production of cement and concrete. As the water slag has the potential hydraulic gelation properties and can be good cement materials with the influence of cement clinker, lime and gypsum. It can be used to make the slag portland cement, gypsum slag cement, lime slag cement , slag brick and slag concrete etc.

　　During the reality application, as the slag is hard to grinding, considering as the efficient of GRMS slagvertical roller mill, when the fineness reach 400m²/kg～500m²/kg is already pretty fine. According the country’s GB/T18046-2000 level, it already satisfy the level S95 requirements if the slag fineness reaches 420m²/kg～450m²/kg. At the same time, it can satisfy the demands of ≤C60 concrete. There’s no need to produce the fineness 600m²/kg grinding slag powder with large amount electricity.

GRM Vertical Roller Mill Can Process Nepheline Used in Ceramic Industry

The nepheline mainly contain the silicate with aluminum and sodium. Its color is colourness or white, sometimes gray, green or red. It has the vitreous luster, the fracture has the greasy fracture. It is mainly used in the aluminum metallurgy, glass manufacturing and ceramic pottery etc. The vertical roller mill can used in the nepheline grinding, control the fineness of production and can be used in the relative areas.

　　The widely usage of nepheline mainly because of its low melt temperature and wide sinter scope. These characters have advantages in the low temperature quickly sintering of large size polishing brick. When making the new type super white polished tile, by adding a certain amount of nepheline powder can reduce the addition amount of zirconium silicate. In this way, the amount of possible radioactive nuclide can be controlled and help the enterprises get rid of the worry about the radioactive limited.

　　The nepheline not only can reduce the worry about radioactive, but also can reduce the sintering temperature and improving the glaze quality of tile. With the suitable add amount in polished tile, it can improve the polished tile strength, reduce the fragility. By this way, it can reduce the damages by mechanical force during sintering, polishing and transportation.

　　Now there is a kind of high purity nepheline powder materials. After usage, people found that nepheline powder has can whitening the ceramic tile and without the radioactive over problem. It is a step during ceramic industry developing. So Great Wall Machinery put out the dedicated vertical roller mill used in nepheline manufacturing and make own contribution for the developing of ceramic industry.

300,000 t/a GGBFS Plant

Overview

As a new type of high performance concrete admixture, ground granulated blast furnace slag (GGBFS) has all kinds of performance advantages about improving concrete compressive resistance, tensile resistance, sheared resistance and bended resistance. At present, with the same amount of GGBFS instead of concrete and cement product of cement dosage, which has become the main trend of building materials industry. Great Wall Machinery is a professional supplier of GGBFS production line, provide "turnkey" service from civil engineering to debugging and capacity and standard reaching to customers, let customers put into production of GGBFS with saving worry, saving effort and high-efficiency.

 Features

A good return on investment, can recover the cost effective

With the application widely of mineral powder, the domestic market demand increase rapidly in this project. Investment powder production line with considerable economic benefit and high return on investment, usually 1-3 years can recover the cost.

High efficiency, energy saving, environmentally friendly

GRMS series slag vertical mill can reduce power consumption effectively in the process of production as the core equipment of production line. Meanwhile, mill internal is negative pressure in process, which produces almost no dust during operation, lower noise and pollution than traditional tube mill.

Mature general contrasting scheme

Great Wall has the domestic first-class technical team, and combined with domestic chief vertical expert for technology. Great Wall Machinery can design detail general scheme according to customer's actual situation, and can provide "turnkey service"  from civil engineering to production operation.

The customers cases witness all over the country

Great Wall Machinery GGBS production line has been recognized by key customers, the domestic production operation of the production line has been up to more than 30, customers all over the country.

Vertical Roller Mill For Power Plant

1.Conceptual Design

Pulverized Coal Production Process Plan Drawing

1. Vertical Roller Mill

2. Blast Furnace

3. Dust Collector

4. Elevating Conveyor

5. Pulverized Coal Bin

II. Required Equipment

Vertical Roller Mill

III. Solution Advantages

1. One single vertical roller mill consumes as little as 18-22 Kwh of electricity for each ton of pulverized coal produced. Wear-resistant parts of the mill ensure an extended use life. The mill is quite efficient at separating large coal particles from fine powder. It is able to produce narrower size distribution than is required under related standards.

2. A reasonable overall structure is a tangible guarantee of stable operation, ease use, and reliable control. This mill brings 30% electricity savings compared with a traditional ball mill. Its fuel economy reaches industry-leading standards.

3. High size-reduction ratio allows the mill to suitable for feedstock of HGI55~60 grindability. The mill is able to function properly under both high and low loads.

4. Noise control level meets the Emission Standard for Industrial Enterprises Noise at Boundary (GB12348-2008).

5. The average dust concentration in the surrounding atmosphere is lower than 1mg/m3, meeting the Emission Standard of Air Pollutants for Cement Industry (GB4915-2004).

Benefits

1. Pulverized coal is easier to burn than lumpy coal. It saves 30% of electricity, meeting the related national standards.

2. During grinding, the grinding roller does not contact directly with the grinding table. This grinding method reduces wear, extends parts use life, and saves production cost. 

3. Normally speaking, the mill would produce 5 to 70 tons of powder coal in an hour. Percentage of coal particles larger than 80μm is as low as 3%.

Traditional Ball Mill’s Three Imperfections Compared with Vertical Roller Mill

Ball mill’s broad prospect in China brings the Chinese ball mill companies unprecedented opportunities. There is no doubt that the main ball mill enterprises will guarantee their industry position and market share in three to five years. The new type environmental ball mills emerge, so the traditional ball mills will be replaced.

　　Imperfections of traditional ball mills are as follows:

　　Firstly, abrasion of steel ball and liners is huge, especially wet way grinding operation - chemical corrosion effect increases the abrasion.

　　Secondly, as the ball material crushing effect lacks selectivity, the so grinding particle size is not uniform, and easy to be crushed. As a result, the traditional ball mills rarely work with open circuit, but in closed circuit operation with classifier, to ensure the product particle size requirements.

　　Thirdly, steel balls movement in the barrel is perpendicular to the earth's gravitational field, so grinding medium must overcome gravity to do crushing, so the energy consumption is higher.

　　Vertical roller mill has more advantages no matter from technical point or operation point:

　　1. The production investment cost is greatly reduced.

　　Vertical roller mill has simple design, compact layout, small construction area, (about 70% of the ball mill system and outdoor displacement), which directly reduces the investment cost. Vertical roller mill has a separator, no need for any additional classifier or lifting equipment. Vertical mill dust gas can be collected by the bag type dust collector or electric dust collector.

　　2. High efficiency, energy conservation and environmental protection

　　Vertical mill grinding principle of grinding material layer, low energy consumption (power consumption is lower than ball mill grinding system by 20% ~ 30%), and along with increase of raw material moisture, the electricity saving effect is more obvious. Vertical mill system energy can save 30% ~ 40% compared with that of ball mill system. There is no steel balls and liners colliding with each other in the vertical mill operation, so the noise is low, (20 ~ 25 db lower than the ball mill operation). In addition, the vertical mill adopts complete sealed system, operation under negative pressure, without dust and clean environment.

　　3. High drying capability

　　Materials are conveyed by hot air in the vertical mill, the air temperature will be controlled when the material has high moisture content, to guarantee the products meet the requirements of the final moisture. In the vertical mill can dry materials - grinding materials mositure is as high as 15% ~ 20%.

　　4. Easy operation, convenient maintenance

　　Equipped with automatic control system with remote control, easy operation; Maintain oil cylinder by rotating arm, and convenient and quick replacement of roller cover, liner, reduce enterprise stop losses.

　　5. Product quality stable and easy to detect

　　The chemical composition of product is stable, particle size distribution are even, is good for the calcination. The time for material to stay in the vertical mill is only 2~3 min, but in the ball mill, it is 15~20 min. So the vertical mill product’s chemical composition and fineness can be measured quickly and correction.

　　6. Small abrasion, high utilization rate.

　　Because in the vertical mill roller mill operation, thee is no direct contact between the grinding table and grinding roller, so there is small metal abrasion, the unit metal consumption is 5 ~ 10 g/t.

GGBS Vertical Roller Mill Production Line Promotes Energy-Saving in Building Field

　In order to speed up the popularization and application of high quality concrete and the development of energy-saving in building field, Housing and Urban-rural Development State, Ministry of Industry and Information Technology jointly issued the file of Several Ideas about Promotion and Application of High Quality Concrete. The file points out that, as an important green building materials, the high quality concrete, with excellent structural properties, mechanical properties, strong durability, high quality concrete should be used to improve engineering quality, prolong its life span, reduce the comprehensive cost of whole project.

　　So, how can we promote concrete building energy-saving while producing high quality concrete? According to Director of famous GGBS Research Center, slag powder, steel slag powder are good concrete admixtures. We mix 10 ~ 35% fine grinding slag powder in the concrete, with 0 ~ 20% ground steel slag powder, 0 ~ 9% silica fume, to replace 10 ~ 50% cement. Total cementitious material consumption is 380 ~ 550 kg/m³ to make C20 ~ C60 Concrete. This technology can manufacture strong characteristic cement, but also turn waste into treasure, and improves the comprehensive utilization of solid waste resources.

　　Picture: Hebei Xinji Aosen Steel Company Annual Capacity of 600000T Slag Powder Production Line

　　Relevant data shows that by the end of July 2014, more than 50 domestic cement plants, grinding stations, steel companies have invested to build slag and steel slag powder production lines with annual output of 200,000T to 1 million T. For example, Xinxiang Great Wall Machinery Co., Ltd.,/our company built annual capacity of 1 million T of slag/1.5 million T of cement production line and annual capacity of 1.5 million T of slag/steel slag line for Henan Meng Electricity, annual capacity of 1.5 million T of slag/steel slag line for Shanghai Baosteel- Ningbo New Building Materials Technology Co., Ltd., annual capacity of 600,000T of slag powder production line for Hebei Xinji Aosen Steel Company, etc.. Large number of mineral powder application will promote the development of high quality concrete.

　　Experts predict that by the end of "The Thirteenth Five Year Plan", high quality concrete mixed with slag powder and other solid waste resources to promote the development of concrete building energy conservation, recycling economy plays a major role.

Affecting Factors to Lifespan of Vertical Roller Mill

Building material market is booming with urbanization development, and that also leads to the development ofvertical roller mill. Vertical roller mill, as a kind of high-efficiency energy-saving environment protection equipment, is more and more popular with more customers and has gradually replaced traditional ball mill. 

Study proves that high quality mill and correct operation is key to prolong the service lifespan of vertical roller mill, also to increase its grinding efficiency. So, how to prolong its service lifespan? 

Firstly, material hardness and content is important.

Different materials with different hardness and contents will cause different abrasions of grinding roller, grinding table, and liners, therefore, appropriate selection of material can effectively increase the service lifespan of vertical roller mill. 

Second, material feeding status is also important. 

Feeding evenly is an important factor to guarantee normal operation of vertical roller mill, if there is no configuration of feeding equipment for production line, there will be plugging material. Uneven feeding will press much pressure on grinding roller, and cause abrasion directly, thus reducing service lifespan of mill. 

Finally, it is technicians’ correct operation and maintenance. 

Generally speaking, if the worker do not know about the machine, it is difficult to operate and maintain it, and this will cause the low production efficiency. Therefore, there must be professional and technical personnel to operate it, to perform correct sequence. When starting it, he should first start the blower, then start the main machine. When stopping it, he should first stop the main machine, then stop the blower. A series of problem including electrical short circuit, will be caused if the operator does not obey the correct sequence.

Vertical mill equipment is efficient or not is fundamental to production benefit, therefore, vertical roller mill is pivotal in an engineering project. To choose a good vertical roller mill means to choose a good start. 

Xinxiang Great Wall Machinery has been dedicated to manufacturing vertical mill for more than 50 years, including Research & Development, manufacturing, sales and service, and pays much attention to improve mill quality and meet customers’ requirements. The grinding roller, grinding table and liners, with long-term contact with feeding material, are main wearing parts. The vertical roller mill manufacturers pays special attention to improve wear resistance to improve lifespan of vertical will, the Great Wall Machinery has great superiority in this respect with its large cast steel base, large machining workshop, electric control workshop, thus ensures qualified large parts of mill. This can not only ensure the production quality, production process but also solve vertical mill repair problem. 

Cement Rotary Kiln Air Volume Control in Cement Production Line

In cement production line, vertical mill and Cement Rotary Kilns are the core equipments in cement production lines,I have said vertical mill in detail. Today, Let us find out more about the Cement Rotary Kiln, cement rotary kiln is at the time of work, the air volume control is close important, it directly affects the production of the finished product, the following specific as we explain how wind Cement Rotary Kiln control:

1.In order to form a circular flame stabilizing the flame. Cement Rotary Kilns primary air volume is too low, not only can not be carried into a secondary air within the wind, improving combustion flame speed, but also no extra momentum to form a circular flame, the flame is not conducive to stability, indirect combustion system is particularly important.

2.The burner production requirements can not be too high. A Cement Rotary Kiln burner air volume is too low, the corresponding pressure must be high, otherwise it will create momentum insufficient mixing of combustion and secondary air is difficult to effectively, while high pressure is bound to make the burner and fan made higher requirements.

3.The material must be burned completely. An amount of wind Cement Rotary Kiln is a case for the premise, that is shock-type flame not be occured, no carbon monoxide emissions.When the primary air volume is too low,it is not conducive to the air mixed with fuel,make the carbon incomplete combustion, thus reduces the thermal efficiency.

In summary, Air volume and wind speed of Cement Rotary Kiln are indeed important parameters. The role of secondary air is the key to accelerate the combustion flame speed and the formation of recirculation. Also,under the condition of air volume not enough, how to use the excellent burners generate enough wind speed, and in the cooler, the air force with the kiln hood Department, to achieve a reasonable control of the flame is the key.

Together with China National Aero-Technology Import and Export Beijing company to build a cement line project in Kenya

　

　　Graph: Export Kenya φ3.8 × 13m two double sliding shoe mill warehouse

      In recent years,the Great Wall machinery with China aviation technology import and export company in Beijing cooperation, for Kenya provide 1 Φ 3.8 x 13 m two warehouse double slipper grinding mill production services,the two warehouse double slipper ball mill is the first fundamental solution to the "due to the discharge end bearing shell temperature can not be a continuous operation" of the problem.

　　Since the completion of the project, the customer in Kenya as the center, and gradually East Africa seven market to provide services, promote the development of Africa's cement market and prosperity.The success of the cement project construction, making the customer information greatly increased, and take the initiative to hope there will be more and the Great Wall machinery have a better cooperation.

The New Type Vertical Mill Advanced Technology Improves the Concretes Performance

These years, a new highly developing concrete technology has been applied in many practical projects. It is the high performance concrete. The durability is the main index for its design. Regard to the different requirements, it guarantees the durability、construct-ability、applicability、strength、volume stability and economy etc. It has the low water-binder ratio, use the good quality material, except cement、water and aggregate, also should add enough quantity mineral admixture and high admixture.

　　By adding the high quality mineral admixture, improving its compaction、reducing the concrete gap capillary、improving the interface and micro-structure between aggregates and cement colloid、improving the concrete quality、preventing large quantity harmful materials coming into the concrete and reduce the concrete erosion.

　　According to the scientific experiments, with the suitable mineral admixture adding, the cost little increase. Especially when C30 concrete add 20% coal ash and 20% slag powder, the cost is nearly same with the original concrete. The concrete factories can use the lower cost to earn more benefits.Combining with our national situation, high performance concrete mineral admixture mainly add the coal ash and mineral powder.Coal ash should use the stable quality products.The strength of concrete below C50 should use the coal ash national standard level I or level II, but the ignition loss≤5.0%, fineness ≤20%. Coal ash should use the water quenching grinding products, the specific surface area is 350-500m²/kg, 28 days activity index≥95%,ignition loss≤3.0%,moisture content≤1.0% etc.

　　As the famous grinding system supplier in China, Great Wall Machinery can be the support of concrete industry. In order to improve the quality of concrete, and realize the energy saving, we have produced the new type vertical mill. This mill has good grinding power, low power consumption and provide good quality products. The coal ash’s specific surface area is 420—450㎡/kg, 7days activity index can reach 100%. Most important, this mill not only can grinding the slag, but also can grinding the coal ash. It save the customer’s equipment investment and maintenance cost. Now, our new type vertical mill has already used in the 350,000t/a slag powder /coal ash production project of Harbin three new energy-saving building materials co.,Ltd.

Better Choice for Energy-saving and Environment-protection - Great Wall Vertical Roller Mill

Recently, Revised Draft of Air Pollution Prevention and Control Law accepted by State Council executive meeting has drawn a heated discussion.

　　The Revised Draft stresses the source management and public participation. It also increases special provisions of collaborative governance and regional joint prevention and control of pollutants on key areas, industry, motor vehicles, dust, etc. It makes clear the punishment measures for undocumented, standard- exceeding discharge and fraud monitoring data behavior.

　　Air pollution caused by coal burning, industry, dust, etc is more and more severe, the Revised Draft requires key discharge units should install emission automatic monitoring equipment in accordance with the national standard, and other enterprises monitor its emissions of industrial waste gas discharge, also requires the implementation of equal or reduction replacement of coal consumption.

　　Serious haze weather in major cities makes people more and more worried in recent years, and requirements of air pollution management are more and more urgent. The air pollution problem is not only related to government's policies and laws, it is but also to improve the living environment.

　　Cement industry as an important factory in China, supplies the cement products for various fields, also provides an important research about the dust pollution and energy-saving problem.

　　Great Wall Machinery as professional cement equipment manufacturer of cement equipment including vertical roller mill, ball mill, rotary kiln, etc, has done many R & D tests on energy saving, environmental protection, abrasion resistance and automation. Great Wall Vertical Roller Mill is best in environmental protection, energy-saving, the highest degree of automation, enjoys character of large-scale production requirements of cement equipment. You are warmly welcome to visit our company!

2.6x13 m cement mill to increase production pathway

In the cement production proces,cement mill is one of the key equipment of cement,cement mill consumption accounts for about 60% -70% of overall power consumption of cement.Raw mill quality decisions and influence the technical parameters of cement rotary kiln,but if cement mill configuration is more reasonable,they can make up for some defects of cement clinker.Therefore,improve the output of cement mill,to realize high quality, high yield, low consumption of cement enterprises has very important practical significance.So, 2.6x13 m cement mill how to achieve high-yield it?The way to achieve high yield and quality and what it?

　　1. Reduce the grinding particle size

　　Cement companies use cement mill + roller mill grinding can be dropped into the mill size 2mm below, production increased by more than 50%.

　　2. Optimize the cement grinding process

　　The open system to the closed system, the addition of efficient rotor separator and bag filter,thus increasing the cement surface area,increasing the strength of the cement with good results.

　　3. Control the grinding material moisture and temperature

　　To integrate into the grinding material moisture control at 1.5%, is the basic premise of high quality and high yield of cement mill.Therefore,cement enterprise need water to mixing materials and material production process strictly control the water drying, grinding into the material temperature control process requirement within the scope of guarantee good operation of the cement mill.

　　4. Control the grinding material easy to grind

　　If you want to improve cement grinding production, you need to optimize the structure of cement raw materials, improve the material was grinding grindability.

　　5. Ensure the ventilation flow in the mill

　　In daily production, cement enterprises should fully realize the importance of the mill ventilation , at the same time, sealed to prevent air leakage to do the work. In addition, you can use powerful ventilation and bag filters and other measures to ensure the smooth ventilation inside the mill.

　　6. Adjust the grinding body in grading

　　According to the actual production needs in equipment configuration allows, appropriate to add the ball, loading capacity,to improve the mill output is very helpful.In addition, because the cement grinding mill work environment is harsh, often in direct contact with all kinds of cement raw materials,the wear is quite serious, therefore, should pay attention to the breakage of the grinding bodies.

　　7. Control the fineness of finished product

　　As we all know, the control index of cement fineness has a great influence on the cement performance. Cement enterprises can through the sieve analysis method to control the cement fineness, 0.08 mm sieve allowance to control in 1.8% 2.8% more appropriate.

　　Great Wall machinery since its inception, has been committed to the vertical grinding machine, tube mill, rotary kiln, the cement equipment research and development and production,is now with the slag/steel slag vertical grinding machine (mainly the EPC project), cement mill developed into China's large grinding system integration suppliers.If you have similar technical problems encountered in the production, you can seek advice to the Great Wall machinery!

Two Advantages of Great Wall Vertical Mill

After almost a decade cooperation with veteran experts on vertical mill manufacturing and scientific research institutes both in home and abroad, the GRM series vertical mills dedicated to be developed and produced by Xinxiang Great Wall Machinery Co., Ltd, have the characteristics of reliable performance, compact structure, convenient maintenance and outstanding energy saving etc. Here are two more important advantages of Great Wall vertical mill.

　　Wear protection

　　The grinding plant, which is carefully maintained by the owner, provided high availability and trouble-free operation. None of the wear protection plates in the mill housing and in the grit cone of the separator have yet needed replacing. Only the ceramic castable in the upper housing section of the separator was replaced by wear-resistant steel plates soon after the commissioning. Once a year, after approx. 3500 operating hours and production of 300,000t of ground blast furnace slag, the surfaces of the grinding elements are refurbished by build-up welding during a planned maintenance stoppage. The specific wear of grinding track and roller tyres, taken together, is 7.3g/t.

　　For long service life of the grinding tools not only the appropriate wear lining is important. The iron extraction system in the external material circuit is an extremely important feature of the Great Wall vertical roller mill for slag grinding.

　　Iron extraction system

　　It is a well-known fact that iron particles in the granulated blast furnace slag are the main cause of wear in the mill. Therefore it is extremely important to remove the maximum possible amount of this iron. The external material circuit is very well suited for this purpose, because it handles a large quantity of material, some of which is already partly ground.

　　The material passing through the nozzle ring falls onto a discharge ring rotating with the grinding table. This material then passes via a discharge chute into the bucket elevator.

　　The material discharged by the bucket elevator is fed to a vibrating trough, to ensure a uniform feed rate to a magnetic drum separator. The aeration of this magnetic drum separator is so designed that practically pure iron with no granulated slag is removed from the stream of material. After the magnetic drum, the recirculated material finally returns to the grinding table. The incoming granulated blast furnace slag has an iron content of 0.28%, corresponding to an iron quantity of 210kg/h.

　　The recirculating material in the bucket elevator has an iron content of 0.7%. The magnetic drum separator removes around 170kg of iron per hour in permanent operation. The iron contents found in the roller mill and in the finish product impressively illustrate the efficiency of the external material circuit for concentrating the iron and facilitating its removal. Such efficient extraction of iron in the grinding process has a very positive effect on wear in the mill.

　　In the world, many granulated blast furnace slag grinding plants are already in operation, but the number of granulated blast furnace slag grinding plants is still low. Customers from all over the world who are now interested in slag grinding are invited to send their inquiries to the Great Wall Machinery. Any of your inquiries will get prompt attention.