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.