Technical Spescification Of Cement Mill
  • Name :Technical Spescification Of Cement Mill
  • Features:Simple structure, easy maintenance
  • Application:Jaw crusher is widely used in various
  • Contiguous item:Feeder Screen Washer
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Introduction of Cement Mill

Cement mill is one of the main cement equipment, after the material is broken, and then crushed the key equipment, in the cement production line, cement production process plays a vital role.

Cement mill is widely used in cement, silicate products, new building materials, refractory materials, fertilizers, black and non-ferrous metal processing industries, the various minerals and other abrasive materials for dry or wet grinding.

Cement equipment performance characteristics

The cement mill is composed of the main parts such as feeding part, discharging part, turning part, transmission part (reducer, small transmission gear, motor, electric control). Hollow shaft steel castings, lining removable, rotary gears using hobbing casting casting, cylinder body with a wear-resistant liner, has good wear resistance. The cement equipment running smoothly, and reliable. According to the material and discharge mode, you can choose dry cement grinding and wet lattice-type cement mill

Working principle of cement

The material enters into the first warehouse of the mill evenly from the feeding device through the feeding hollow axle, which has the step lining board or the corrugated lining board, the inner different size steel ball is inside, the cylinder body rotates to produce the centrifugal force to bring the steel ball to a certain height After the fall, the material produced a heavy blow and grinding effect. Material in the first warehouse to reach the coarse grinding, the single-compartment board into the second position, the warehouse with a flat liner, with ball, the material further grinding. The powder is discharged through the discharge grate to complete the grinding operation

Cement production line process

The cement production line adopts the new dry cement preparation technology, which is mainly composed of crushing and pre-homogenizing, raw material preparation homogenization, preheating decomposition, cement clinker firing, cement grinding and packing process, Grinding, or the first drying after grinding into raw meal, and then feed raw meal into the cement rotary kiln calcined mature material, and then clinker plus amount of gypsum (sometimes mixed with mixed materials or admixtures) with MBS Type rod mill grinding into.

1, the material crushing and pre-homogenization. Large stone by the silo by the vibrating feeder evenly sent to the jaw crusher for coarse crushing, coarse crushed stone by the belt conveyor to the impact crusher for further crushing. Limestone crushing in the cement machinery broken material occupies a more important position. Raw materials pre-homogenization technology is in the raw material storage, take the process, the use of science and technology of the stack heap material to achieve the initial homogenization of raw materials, raw materials yard also has the function of storage and homogenization.

2, the preparation of cement raw materials. Cement production process, each ton of portland cement production equipment to at least 3 tons of grinding materials, materials, including raw materials, fuels, clinker, mix, gypsum, according to statistics, dry cement production line grinding operation needs to consume Of the total power of about 60% of the power plant, which accounted for more than 30% of raw materials grinding, coal mill accounts for about 3%, about 40% of cement grinding. Therefore, the rational choice of grinding equipment and process, optimize the process parameters, correct operation, control operating system, to ensure product quality and reduce energy consumption is of great significance.

3, raw material homogenization. In the new dry process cement production process, the stabilization of raw materials into the pits is the prerequisite for stabilizing the thermal system of clinker burning. The raw material homogenization system plays the last key role in stabilizing the ingredients of pits.

4, preheat decomposition. Cement machinery to raw material preheating and partial decomposition by the preheater to complete, in lieu of the rotary kiln part of the function, to shorten the length of kiln back to the kiln, while the accumulation of gas in the state of heat transfer process, moved to the preheater Suspended state, so that the raw material can be discharged with the kiln, the hot gas fully mixed, increasing the gas contact area, heat transfer speed, high heat exchange efficiency, to improve kiln production efficiency and reduce clinker burning heat Consumption purposes.

(1) 80% of the material dispersion heat transfer carried out in the inlet pipe. Feed raw material in the preheater pipe, with the impact of high-speed rising airflow, the material turned up with the air flow movement, while being dispersed.

(2) Separation of gaseous solids When the air entraining powder enters the cyclone, it is forced to rotate in an annular space between the cyclone cylinder and the inner cylinder (exhaust pipe), and moves downward while rotating , From the cylinder to the cone, has been extended to the end of the cone, and then turn up the rotation up, from the exhaust pipe.

(3) The appearance of pre-decomposition and pre-decomposition technology is a technical leap in cement equipment calcination process. It is in the preheater and the rotary kiln between the addition of decomposition furnace and the use of kiln tail rising flue, fuel injection device, so that the fuel combustion of the exothermic process and raw material decomposition of carbonate endothermic process, the decomposition Furnace in a suspended state or fluidized state quickly, so that the decomposition rate of raw materials into the kiln to more than 90%. Will be carried out in the rotary kiln carbonate decomposition task, moved to the decomposition furnace for; most of the fuel from the decomposition furnace to join, a small part from the kiln to join to reduce the kiln calcined belt heat load, extended lining Material life, is conducive to the production of large-scale; as fuel and raw materials mixed evenly, the fuel combustion heat to the material in time, so that combustion, heat and carbonate decomposition process is optimized. Which has high quality, high efficiency, low consumption and a series of excellent performance and features.

5, the firing of cement clinker. Raw material in the cyclone preheat and pre-pre-decomposition, the next is to enter the rotary kiln for clinker firing. Carbonate in the rotary kiln further rapid decomposition and a series of solid-phase reaction, the formation of cement clinker and other minerals. As the temperature of the material increases, the minerals become liquid phase, dissolve in the liquid phase and react to produce large amounts of clinker. Clinker firing, the temperature began to decrease. Finally, the high temperature clinker discharged from the rotary kiln is cooled by the cement clinker cooler to the temperature that the downstream conveying, storage and cement machinery can bear. Meanwhile, the sensible heat of the high temperature clinker is recovered to improve the thermal efficiency and clinker quality of the system.

6, cement grinding. Cement machinery is the final process of cement manufacturing, but also the most power-consuming processes. Its main function is to cement clinker (and gelling agent, performance adjustment materials, etc.) to the appropriate size of grinding (fineness, specific surface area, etc.), the formation of a certain particle size distribution, increasing its hydration area, Accelerate the rate of hydration, to meet the cement paste coagulation, hardening requirements.

7, cement packaging. The cement factory has two kinds of shipping methods of bag and bulk.

Cement production line Investment income:

Cement production process, each producing 1 ton of Portland cement at least 3 tons of grinding materials (including raw materials, fuels, clinker, mix, gypsum), according to statistics, dry cement production line grinding operation needs Power accounts for about 60% of the power plant, of which more than 30% of raw meal grinding, coal grinding about 3%, about 40% cement grinding. Therefore, the rational choice of grinding equipment and process, optimize the process parameters, correct operation, control operating system, to ensure product quality and reduce energy consumption is of great significance.