Professional manufacturer of Rotary dryer

The rotary dryer is a type of industrial dryer employed to reduce or minimize the liquid moisture content of the material it is handling by bringing it into direct contact with a heated gas.It is widely used for drying the chalk slags, coal powder, slags, clay and other materials in the building materials, metallurgy, chemical industry, cement industry. The rotary dryer has a better adaptability and can dry various materials with a simple and reliable operation.

　　Working principle

　　The auto-combustion device provides heat resource for our Industrial drier, which adopts down-flow heating method. When the mineral materials are fed into the cylinder, it flows down as a result of gravity. Meanwhile, they are repetitively scattered in the air so that they are in full contact with the hot air. The material is dried gradually

　　Advantage of rotary dryer

　　The dryer has advantages of reasonable structure, high efficiency, low energy consumption and convenient transportation.

　　Performance Characteristics of Rotary Dryer:This series drier is used for drying materials with humidity or granularity in

　　the industries of mineral dressing, building material, metallurgy and chemical. Rotating dryer can be used for drying many kinds of materials and with convenient and reliable operation; therefore, it has been widely used.

       Great Wall not only is professional cement equipment manufacture , we also can provide high quality rotary dryer , if you need rotary dryer , please contact with me.

2015(The 17th)China international conference on mining site show

2015 (17th) China international mining conference at 9 am,21th, (Wednesday) officially opened in tianjin. The conference on "the new normal, new opportunities, new development" as the theme, around the mining industry sustainable development, the global mineral exploration, mining and capital market situation, green mining, comprehensive utilization of mineral resources, such as project for discussion, including peak BBS, three parts industry exhibition and project activities. From 55 countries and regions, more than 8000 government officials, experts and scholars and mining companies, financial institutions, representatives gathered, the Great Wall of xinxiang machinery co., LTD., with energy saving ball mill,vertical grinding machine with high efficiency, mineral processing equipment and accessories and other large steel attended this conference, has attracted many customers to visit.

　　Exhibition name: China international mining

　　Exhibition time: October 20-23, 2015

　　Exhibition location: tianjin meijiang convention center

　　Booth number: N1216

　　Hotline: +371-55019608

　　All the way to seize the "One Belt And One Road" new opportunities, and actively adapt to the new norm, develop new mining area, the Xinxiang Great Wall in "Great Wall Machinery of Xinxiang,Great Wall Machinery of Word" ,as the concept of enterprise development, and constantly work with henan university of science and technology and other scientific research institutions to carry out the manufacture-learning-research cooperation, the development of new and energy-saving new products, perfect one-stop service levels, has realized from the mining mill of single machine manufacturing finished to the system integration integrated service provider ,the role transformation, become the industry's leading supplier of turnkey project

　　Xinxiang Great Wall has integrity casting and production system of processing base, strong production and processing capacity, advanced and completed equipment with stable quality and quick response ,has won the reputation in the customers at home and abroad, the production of grinding roller, grinding stable, the girth gear, supporting roller, kiln tyre, hollow shaft and other large steel castings, are exported to Japan, South Korea, Italy, Germany, etc. More than 50 countries and regions. The world famous manufacturer of vertical mill Denmark Smith and the world's largest iron and steel group Mittal steel group are long-term partners.

　　The Great Wall of xinxiang machinery will with the help of the mining conference platform, to show the world the Great Wall of xinxiang mechanical strength, to strengthen the exchanges and cooperation with international mining companies, in order to promote the green mining development contributes own strength!

October major benefits, focusing on the Great Wall

For today's casting industry, the environment of global economic weakness and weak industry under the influence of the situation, fight a protracted war industry, has become many casting expert future preparing strategies.

　　Under the background of global economic situation is weaker, every movement of the Great Wall steel casting will be closely watched. Recently, the Great Wall steel casting godd news continuously, large steel casting orders, never stopped. Walk in a large modern foundry, look up, one large steel product is under workshop worker's hand in the final stages of processing. According to understand, although in the casting industry under the weak environment of the downturn, but is still a busy scene foundry of Great Wall steel casting , each group workshop workers are necessarily up orderly production work.

　　In recent years, the Great Wall steel casting pursuit of excellence, adhere to market-oriented, customer-focused business philosophy has been deeply rooted in the hearts of the people, in a deep-going way and ensuring the quality, the service concept of service quality, the purpose of the Great Wall steel casting is only one, that is to create greater value for customers, providing customers with the most rapid, effective and high quality brand service.

　　It is worth mentioning that many clients at the Great Wall steel casting after had a pleasant cooperation experience, is convinced by good services and first-class product quality of great wall steel casting, the second time and many times do not hesitate to chooselarge steel castings from the great Wall steel casting , such as the world's largest iron and steel group, Mittal group, the world first-classvertical grinding machine manufacturers - Denmark Smith has repeatedly to buy large steel products from the great Wall steel casting .The typical cases of secondary cooperation and long-term cooperation, have proved that the Great Wall of large steel products has been deeply rooted in the hearts of the people.

　　Whether the development strategy of "One Belt And One Road" or "made in China 2025" strategic policy Issued and implemented, suggests a direction of sustainable development: China's equipment manufacturing industry in the face of the challenge at the same time, also usher in a new development opportunities and business opportunities. As a large-scale steel product solution provider, the Great Wall steel casting in pay attention to product quality and service at the same time, relying on emerging Internet power, upstream, break through the downturn and surrounded by weak economic environment, prepared to layout the global strategy.

　　The Great Wall steel casting do every effort and reform , means the Great Wall steel casting in the direction of the victory, and made a solid pace, Great Wall steel casting various efforts also signal to the world, the Great Wall steel casting has made adequate preparation, in the coming days, play it a beautiful and lasting business battle.

LIVE BROADCAST: Xinxiang Great Wall 4*60m lime kiln was sent to Guangxi province(二)--Lime Kiln Advantages

1. Activity is higher than the traditional shaft kiln 30ml

　　The material heated evenly in the revolving lime kiln, the probability of mild and excessive calcination is low. The lime activity degrees produce by lime rotary kiln is higher than the shaft kiln. The lime activity can reach up to 400ml.

　　Comparison of Lime Kilns on The Market

　　2.Production capacity reach up to 1500 t/d

　　The lime kilns produced by Great Wall Machinery have large capacity, the output can reach to 1500t/d, operating well to guarantee enterprise up-scaling and reduce the production cost.

　　3.Auto-control reduce the labor cost

　　Auto-control by using DCS remote control system, only need 2-3 operating personnel in the whole line.

　　4.Good quality of finished products, low probability of mild and excessive calcination

　　Product quality is uniform, the probability of mild and excessive calcination less than 8%.

　　5.Gas fuel, energy saving and environmental protection

　　Great Wall lime kiln belongs to open type calcination equipment with advanced manufacturing technique，lower energy consumption than the old lime kiln calcination system and more environmental protection for adopts the exhaust blast furnace gas.

　　Project installation progress

　　Please contact our 24-hour service hotline to know more lime kiln process parameters and price details.

　　hotline:+371-55019608

　　Xinxiang Great Wall sincerely look forward to serve you!!

High-Efficiency Roller Mills's usage in nowadays

1. Traditionally, ball mills are used in cement industry for raw material, fuel and product grinding. Ball mills use an established technology and offer certain advantages. However, they have higher energy demands. By using an appropriate kind of the more efficient roller mill technologies – either as a replacement or in combination with ball mills – considerable energy savings can be achieved without compromising product quality. The following roller mill concepts are applicable to cement manufacturing:

   2. Vertical roller mills: In these mills materials are crushed between a rotating grinding table and 2 to 6 grinding rollers positioned slightly less than 90 degrees from the table surface and pressed hydraulically against it. Main advantages of vertical roller mills include:

relatively low power consumption (less than 10 kWh/t – for medium raw material hardness and medium fineness);

ability to combine grinding, drying (using waste heat from kiln system) and separation;

ability to manage larger variations in mass flow rate (30 to 100% of mill capacity).

Vertical roller mills are available in a wide range of capacities – 5 to 1200 t/h. 

According to National Development Reform Commission of China, VRMs have the following generic power consumption values when used for different purposes in a 6:

for raw material grinding, power consumption may range between 14 ~ 17kWh/t-material;

for coal grinding, power consumption may range between 20 ~ 22kWh/t-coal;

slag grinding, electricity consumption may range between 39 ~ 45kWh/t-slag.

The life-time of the wear resistant material is reported to vary between 8000 to 12000 hours. (NDRC,2008. p.50).

In China, market penetration of VRMs within the building materials sector was expected to reach 50% during the eleventh five-year development period, requiring an investment of around 1.08 billion RMB, and holding a potential to reduce energy consumption by 500 GWh (NDRC, p.51). 

VRMs are installed in new cement plants with dry systems, and also often replace ball mills during plant modernization, where the raw material moisture content is less than 25%. As of 2010, VRMs for raw material preparation had a penetration rate of 45% in Chinese market. During the twelfth five-year period, the market penetration of the technology is expected to reach 80% (MIIT, 2012. p.20)

Horizontal roller mills: Here materials are crushed inside of a rotating mill tube which also contains a grinding roller that is hydraulically pressed against the inside surface of the tube. Horizontal roller mills use 65-70% of the energy used in ball mills.

Roller press (high-pressure grinding rolls): In this technology materials are crushed between two counter-rotating rollers. These rollers are up to 2 m in diameter and 1.4 m long. Roller presses use 50-65% of the energy used in ball mills.

Vertical coal milll application and advantage

Vertical coal mill is typically designed to process materials in medium hardness, like soft coal or bituminous coal, and it is mainly used in positive pressure pulverizing system of soft coal.It is widely used in electricity field, metallurgy sector, building material industry, chemical industry, etc. It is an ideal device that integrates crushing, drying, grinding, and grading conveying all together.

　　Coal pulveriser design

　　In general, coal pulverisers are designed to achieve the maximum rated capacity grinding coal with a grind ability of 55 HGI and 8-12% moisture and achieving a discharge fineness of 70% passing a 200 mesh screen (74 micron) and 99.5% passing a 50 mesh screen. Variation of the coal hardness and moisture content will effect, up or down, the discharge capacity or the discharge fineness.

　　To achieve these design considerations it is essential that the grinding elements are in good condition and they maintain a consistent profile. The loss of the grinding profile results in a loss of grinding efficiency, meaning the pulveriser must work harder to achieve an equal result.

　　Ultimately a point will be reached in which either a loss of capacity or a loss of fineness will result under uniform conditions. Longer lasting, more consistent grinding elements are crucial to pulveriser operation yielding longer operating campaigns, reduced maintenance and a lower overall invested cost.

　　Environmental Friendly

　　With small vibration, low noise, and the overall sealing, the system works under negative pressure, so there is no dust going out. (It meets the requirements of the state environmental protection.)

　　High Drying Ability

　　As the hot air inside contacts directly with the material, drying ability is higher, and it saves energy. By regulating the air temperature, it can meet requirements with different humidity.

　　Simple and Reliable Operation

　　Firstly, it is equipped with automatic control systems, so remote control makes it easy to operate. Second, it is equipped with one device, which prevents the roller from contacting with the liner directly, and avoids the destructive impact and severe vibration.

Great Wall Machinery: professional manufacturer of lime kiln

With the lime widely used in the iron and steel industry, calcium carbide industry, coking industry and other industrial production more, the demand for active lime is increasing, which opened up a broad market.

　　Lime kiln lime is the key equipment for producing active lime, and its technical parameters, performance and operating conditions, to a large extent determine the quality, yield and cost. Great Wall Machinery’s lime rotary kiln has advantages of advanced structure, energy saving, large output and many other advantages, using advanced technique, combined with 50 years of experience in large-scale rotary kiln production.

　　Main advantages of Great Wall lime production line

　　1. good activation

　　Great Wall’s lime kiln can improve the preheating effect, increase productivity, produce good quality lime (lime degree of activity ≥300 (ml)),deal to advanced structure, low loss vertical preheater. Great Wall lime kiln is ideal energy saving kiln.

　　2. avarage save above 40% energy

　　Fully sealed furnace, refractory,hotinsulation layer adopts multilayer refractory with more than 5 years’ lifetime, good mild . For efficient use of energy, the upper and lower furnace have heat exchange, which greatly reduce the heat loss from the upper and lower.The power of lime kilns work has adopted the inverter control and run, which avoid large horse-drawn carriage and operatio with no-load, and save 40% energy and more.

　　3. daily output up to 1200 tons

　　Several Great Wall’s lime production line applied in large and medium-sized building materials enterprises with capacity 150 tons -1200 tons of kiln is running in good condition. Especially φ4.8 × 74m rotary kiln is the largest rotary kiln in China, output up to 1200 tons.

　　Great Wall Machinery supply active lime production line with output 200 tons to 1,500 tons per day based on user needs. We supply "turnkey" service including scientific reports, design, equipment, civil construction, installation, commissioning, reach output targets.