subject: The Cement Production Process - Grinding [print this page] 1, the material dispersion 1, the material dispersion
The heat exchanger 80% in the inlet pipe. The raw material feeded from preheater pipe, with the impact of the high-speed updraft, materials turn off with the air movement, while dispersed.
2, gas-solid separation
After airflow carry the material powder into the cyclone, powder are forced swirling flow within the annular space between the cyclone cylinder and the inner cylinder (exhaust pipe), and the side of the rotating side of the downward movement of the cylinder to cone has been able to extend to the end of the cone, and then turned on the rotating rising from the exhaust pipe.
3, precalciner
The emergence of the pre-decomposition technique is a technological leap in cement calcining process. It is an additional preheater and rotary kiln calciner and kiln end rise in the flue, and set the fuel injected into the device, so that the fuel combustion exothermic process carbonate decomposition endothermic process of the raw material in the calciner to the suspended state or fluidized state quickly, so that the decomposition of kiln feed rate to more than 90%. original carbonate in the rotary kiln The decomposition of the task, and moved to the calciner; the majority of fuel added from the calciner, a small part joined by the kiln head, which reduce the heat load of the kiln calcination zone, to extend the lining life, also is conducive to the large-scale production;
The mixing of fuel and raw materials, fuel heat of combustion pass in a timely manner to the materials, combustion, heat transfer and the carbonate decomposition process has been optimized so they have a series of excellent quality, high efficiency, low consumption, performance and features.
The cement production process - cement clinker firing the raw material in the cyclone preheater to preheat and precalciner, under a process to enter the rotary kiln clinker firing.
The cement production process - grinding:
The fine grinding of cement clinker is usually a closed circuit grinding process (ie, closed-circuit operating systems) in order to prevent the dust flying in the production, cement plants are equipped with dust collection equipment. Electrostatic precipitator, bag filter and cyclones to close dust are the commonly used in cement plant as dust collection equipment. In recent years, due to the pre-equalization, the homogenizing delivery and collection of raw material powder use new technologies and equipment, especially in raw materials outside the kiln decomposition technology , resulting a new dry cement production process. The cement production process so that the dry production of clinker quality as much as the wet production, decreased power consumption, has become the development trend of the national cement industry .
