Great Wall "multi-purpose vertical mill " is about to debut Nanjing International Summit

　　It is reported that the Great Wall Co., Ltd. of Xinxiang will release a Lecture about multi-purpose vertical mill at 2015 Eighth International grinding Summit which Will be held on May 22, then, Xinxiang Great Wall Machinery "multi-purpose vertical mill" will shock debut to promote the energy-saving innovation and low-cost production of the cement grinding system.

　　Why select vertical mill for cement plant?

　　Clearly, In today's energy-saving background of cement industry, vertical mill has become the best cement grinding equipment. Vertical mill's application has become a powerful guarantee to reduce energy consumption, efficient production, high-quality production of the cement plant.

　　Why select "multi-purpose"vertical mill for cement plant?

　　"multi-purpose" is an effective way to reduce the cost of cement production. Cement plant need grinding the cement clinker, accessories and slag admixture separately, Therefore,many cement plant import several sets of vertical mill grinding production to meet the production needs of a variety of materials.

　　How is the Application Effect of the “multi-purpose”vertical mill in the cement plant?

　　According to the China Building Materials News reported, Xinxiang Great Wall, "multi-purpose " vertical mill has been successfully applied in Yuhui 1 million t/a cement line and 0.6million t/a slag powder line, and was tested and running smoothly in December 11.

　　In Henan Yuhui cement plant, you can see the GRMS46.41 vertical mill was used in the cement production line, can grinding the cement clinker, accessories and slag admixture separately, converte these three materials according to production requirements in 20 minutes.

　　From the control room data, we know that in this vertical mill, the production capacity of the 95 Mineral composite 32.5 cement, concrete admixtures are 130 t/h, 190 t/h and 225 t/h, especially production performance of the cement clinker is much more better than the other company's production.

　　Great Wall Machinery "multi-purpose" vertical mill has become a backbone of cement plants for improving grinding efficiency, reduce grinding power consumption and reduce cost of cement production ! May 22, the Nanjing International grinding Summit, a multi-purpose vertical grinding mill-so stay tuned !

Slag powder line, raise the value of the slag, reduces environmental pollution.

In response to the call of the national five-year plan of energy saving, many companies began to adjust the industrial structure, the slag ground into powder, as a new type of building material, a good way to processing slag, is not only change waste into treasure, raise the value of the slag, but also reduces environmental pollution.

Slag powder is widely used in engineering construction, can replace 10 to 40% of cement when configuration of concrete, concrete strength can reach more than C60, also can improve the life of concrete, increase its strength, reduce project cost; not only that, slag powder in the production of cement clinker can replace part of the same amount of usage, a significant reduction in production costs, reduce the free calcium, improve stability and performance of the passing rate of cement, slag powder mixed with cement, and to improve the overall performance of cement，and sales  the same price like cement; therefore, slag powder has broad market prospects.

Talk about slag powder process, probably a lot of people have question: what is the process of slag powder line?

1.Material System

Slag is transported via train to the slag heap, after the preliminary dehydration, sent into silos, and then transported via conveyor to the drying room feeder.

2.drying system

Slag in Drying room silo feed into the dryer for drying by vibration feeder, drying heat needed by the dryer before the supply of coal-fired stove, slag after drying sent into a steel cage by crew conveyor, bucket hoist, and then sent into the mill by belt conveyor after removal of iron.

3.Grinding System

Slag sent into vertical mill after drying , then the slag powder was selected by separator filter, and returned to the mill slag powder by the screw conveyor to continue grinding mill, and the mill to form a closed loop qualified slag powder has a screw conveyor to the finished product warehouse.

4.Finished system

Slag powder production line last have a finished product warehouse, finished the slag powder is transported through the screw conveyor over, you can have the package delivered to require manufacturers of.

Last August, Shanghai Baosteel and Xinxiang Great Wall machinery co., LTD signed an annual 1.5 million tons of slag slag powder turnkey contract, at present, the project is running smoothly; Great Wall company has its own annual output of 600,000 tons of slag powder demonstration training base, and use the vertical mill equipment is the Great Wall Machinery Company research team independently developed, whether it is quality or delivery, efficiency, etc., have a safe and reliable protection.

Factors affecting the slag vertical mill production quality

Usually in industrial production will discharge some abandoned slag. In the past they are always not rational use, not only pollute the environment, but also caused a lot of waste of resources. With the development of industrial technology, these problems have been resolved gradually, slag is grinded by vertical mill and applied to concrete, cement to improve their overall performance. By this way not only protect the environment, but also improve the utilization of resources, bring great economic and social benefits.

As more and more slag ore appears in the market, the competition is become more and more intense.So what is the main factors that impact the production quality of vertical slag mill yield ? How to improve the slag vertical mill production quality?

The factors influenced the quality are quite many, the most important ones are as below:

First, the influence of the material

Stability of feeding the amount is the key of vertical mill normal operation, Feeding unstable will cause feed material bed wear, even severe uneven stove when coking production.The iron content of the material also affects the yield and quality of vertical mill, the material contains coarse particles of iron or material conveyor belt has chunks of other impurities, it may even result in a stuck impeller feeder, therefore, require homogeneous material level of stability and as much 

Second, the impact mill operating pressure

The mill operating pressure will directly affect the yield and quality of vertical mill.If the operating pressure increased, their grinding capacity also will increase.Therefore,base on ensuring the quality of the vertical mill capacity mill operating pressure can not be set too high, it should be ready to adjust the operating pressure of the actual situation.

Pressure on the ratio of the reference

Grinding clinker: 8.0 ~ 9.0MPa

Grinding slag: 9.0 ~ 9.5MPa

Third, the influence of the classifier 

classifier powder selection ability directly affects the quality of the grinding. The higher the efficiency ,less qualified fine powder go back grinding, finished product output is higher, the opposite is low.Therefore, choose a kind of powder with high efficiency of vertical mill equipment.

Classifier speed reference 

grinding clinker: 105 ~ 120 r/min 

grinding slag: 130 ~ 145 r/min

Forth, the influence of air flow 

in general, the size of the mill air volume is one of most important factors affecting yield.Insufficient air volume will form the ability of dust, and the air volume is too big and will increase the load of dust collector, this will affect the quality of vertical mill production.Therefore, different ground conditions, different production, different requirements have different air volume control results.

Fifth, the quality of the vertical grinding machine itself

 the quality of slag vertical roller mill itself is also one of the most important factor.Therefore, choose a good slag vertical mill equipment is very important.Xinxiang Great Wall machinery since established in 1958, focused on vertical grinding machine for more than 50 years.GRMS slag vertical grinding machine is the Great Wall machinery in response to the national energy conservation and emission reduction policy, scientific research team after more than 10 years research and develop this significant energy saving, environmental protection, low carbon product machine.This machine was deeply loved by the masses of customers at home and abroad, this advantage is closely linked with grinding machine itself.The following is the unique advantages of Great Wall mechanical slag vertical mill:

1, Vertical slag mill production line system power consumption is 43 KWH/t commonly, energy-saving effect is remarkable

2, unit coal consumption quantity is little, reduce the cost

3, slag vertical mill machine equipment stable performance, operation rate is above 95%

4, widely used, can grinding a variety of materials

5, little noise, dust concentration is low, environmental effect is remarkable

6, customer purchasing many cases, all over the country