The layout of the cement production line is set up cement clinker production line in mining area, and builds cement grinding station near the cement sales market in the big and middle city. Most of the cement admixture is the city’s industrial waste generated. Cement grinding station can greatly absorb the slag, fly ash, cinder, coal gangue and other industrial waste, which is a green industry. The cement station provided by our country adopts the simplest process flow, with the advantages of easy to operation, at least process equipment, low investment, energy-saving and environmental protection; what’s more it can be mixed with more materials.
Cement production process: materials→ drying →milling →selecting powder → cement
In the cement production process, drying and milling are the two most important steps.
Here we mainly explain the milling step. In this step the main machinery we used is cement ball mill which is also called ball mill for short. Cement ball mill is mainly applied to mill the finished products and raw materials of cement factory; it is also widely used for grinding ores and grind-able materials in metallurgy, chemical industry, electric power and other industrial and mining enterprises. It is not only suitable for open flow grinding, but also close-circuit grinding after combine with separator. The cement mill has the characteristics: strong adaptability, continuous production, high compression ratio, and easy to adjust the grinding fineness. It can be not only used for dry production and wet production, but also grinding and drying at the same time. The drying raw material can become the cement after the treatment of cement mill. The following step will use the important equipment: rotary kiln. As we all know, the cement after the cement mill is still raw, that is, the cement and water are separated from each other, and they cannot be mixed together. Here we will deal with raw cement through cement rotary kiln in order to get semi-finished cement.
Grinding cement will produce a lot of heat, which are detrimental to the quality of cement and the grinding efficiency and have a great impact on the yield. The water is atomized to spray into the mill through the high-pressure air, which affectively takes away the heat from the mill and makes the mill keep cool. Water is the surface active substance, which can easily make the coalescence with particles realize the disintegration to prevent the material on the grinding media. The water spraying is determined by the temperature in the mill, which will not spray water below 1000℃ in general.
In addition, the amount of the spraying water is determined by the temperature of the clinker in the mill, which may be about 1%-2% and makes the water injected in the mill evaporate completely without residual moisture. Both water spraying from the grinding head and from the grinding end is OK.
Why do we call them semi-finished cement? Because the cement processed by cement mill can’t reach 100% of powder raw material. So we should screen the semi-finished cement by using rotary kiln, and re-process the raw materials which are not powder.
Thus, the cement production process is running to the end. Of course, the conveyor is indispensable in the whole production line. Whether in the process of raw material into the dryer or the dried product into the cement mill, and even the product after milled in to the rotary kiln, all of the steps are integrated by the conveyor.
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