What equipment is used for clean coal powder preparation

The LM vertical coal mill system of Liming Heavy Industry is a dedicated equipment for clean coal powder preparation. It integrates crushing, grinding, drying, and grading transportation, and achieves a one-step pulverization process of grinding and drying in the form of drying and pulverization. This large-scale grinding equipment has condensed stable technological elements, equipped with a "five level safety explosion-proof system" such as CO-O2 online analysis, a grinding roller hydraulic device, and an automation control system, making the entire milling process clean, environmentally friendly, safe, efficient, and intelligent with high yield. Users can make diversified choices based on production, fineness, investment, and other requirements.
The raw coal is sieved through a grid mesh from the raw coal storage yard and falls onto a high angle belt conveyor or elevator. After being removed by an electromagnetic iron remover, the belt conveyor or elevator sends the raw coal to the raw coal bunker for storage. After the pulverization system has been started, open the rod valve at the bottom of the raw coal bin, start the sealing and metering belt coal feeder, and the raw coal enters the LM vertical coal mill for drying and grinding. The hot air or exhaust gas from the hot air stove enters the vertical coal mill under the suction of the system fan, and after sufficient heat exchange with the raw coal being ground in the mill, the coal powder is picked up and sorted at the separator. The coarse coal powder with unqualified fineness is re landed on the grinding plate for grinding, and the qualified coal powder is collected by the explosion-proof gas box pulse dust collector with the airflow, and discharged into the coal powder bin through the dividing wheel. The impurities in the raw coal, such as some coal gangue, metal blocks, etc., are discharged from the mill through the air ring and slag discharge port. In the entire process, a CO-O2 online analysis system is installed. When processing coal with high volatile content, safety measures such as nitrogen protection and CO2 automatic fire extinguishing system can be set up.
The LM series vertical coal mills of Liming Heavy Industry operate under negative pressure throughout the entire production line, using explosion-proof gas box pulse dust collectors, without dust overflow, with low noise and energy consumption, meeting the latest national environmental protection requirements. Moreover, this device has advantages such as high output, high efficiency, and low energy consumption. It can be directly fed into the mill through hot air to dry materials with a moisture content of up to 15%, and a moisture content of less than 1% when discharged. The coal mill system adopts five levels of safety and explosion-proof measures, with a safe and reliable design that meets national and industry parameter specifications.