Grinding Equipment in Cement Production Process

The main raw materials used in the cement manufacturing process are limestone, sand, shale, clay, and iron ore. The main material, limestone, is usually mined on site while the other minor materials may be mined either on site or in nearby quarries. Another source of raw materials is industrial by-products. The use of by-product materials to replace natural raw materials is a key element in achieving sustainable development.
In the technics of Cement production process, People usually choose limestones and clays as the main raw materials, crushing, concocting, grinding them into cement raw meal, feeding them into cement kiln. After being calcined maturity, adding appropriate amount of gypsum (sometimes mixing the mixed material or admixture) then being grinded, and the cements form.
1, crushing and pre-homogenization
In the first phase of cement production, most of the materials should be crushed, such as limestones, clays, iron ores, coals etc. Especially the limestones are the largest demand materials. Its raw size from mining is very large and is with high hardness. Therefore the limestone crushing is very important in the cement production.
In the phase, the needed equipments are primary crusher and secondary crusher. Here the recommended machines are jaw crusher, impact crusher, cone crusher. Sometimes the construction wastes are used as the raw materials, and then a mobile crusher is also a wise choice.
The pre-homogenization process makes the materials storage and homogenization.
2, The prepare and homogenization of cement raw meals
In the cement production process, every production of 1 ton of Portland cement grinding at least needs 3 tons of materials (including raw materials, fuel, clinker, mixed materials, gypsum). According to statistics, the grinding process in thedry-process cement production lines operating cost 60% power, in which grinding raw materials accounted for more than 30%, grinding coal accounted for about 3%, and about 40% of cement grinding. Therefore, a reasonable choice of grinding equipment and processes and to optimize the process parameters, the correct operation, the control of operating system, is of is of great significance to ensure product quality and reduce energy consumption.
The available grinding mills include Raymond mill and other roller mill. But usually the processing capacity of the Raymond mill can't meet the big demand of the clients. We know the amount of the rollers determines the processing capacity of grinding mills, and at present the most rollers of aRaymond mill are 4 so its capacity can be at most 4 ton per hour. So a new roller mill with 6 rollers has been the popular one and achieves high repute from the users, which is named Super Pressure Trapezium Mill. It is the real king of roller mills and its capacity can be up to 20 tons per hour base on limestones materials. Also, another new one is called High Pressure Suspension mill, whose capacity can be about 10 tons per hour.
3, pre-decomposition and the burning of cement clinker
Preheating the raw material and some decomposition are completed by the preheater, instead of some functions of rotary kiln to shorten the length back to the kiln.
Raw material completes the preheating and pre-decomposition in the cyclone preheater. The next process is carried out the rotary kiln and calcined to cement clinkers.
4, cement grinding
Cement grinding is the final process in cement manufacturing, which cost the most electric power. Its main function is to grind cement clinkers into condign sizes (in fineness, specific surface area etc.) and make them form a certain particle size levels to meet the coagulation, hardening requirements.
Each cement product is stored in an individual bulk silo until needed by the customer. Bulk cement can be distributed in bulk by truck, rail, or water depending on the customers needs. Cement can also be packaged with or without color addition and distributed by truck or rail.
As the professional manufacturer of complete sets of mining machinery, such as China cone crusher,Sand washing machine, Henan Hongxing is always doing the best in products and service.