LM Series Vertical Coal Mill

Introduction:

Coal from the coal yard after being sieved by the lattice screen and then fall on large inclined angle belt conveyor or elevator. The electromagnetic removes iron, belt conveyor or elevator will send the coal into the storage hopper. The milling system has been started, then open the rod valve at the bottom of the hopper, start sealed & weighted belt feeder , raw coal goes into the vertical mill for drying and grinding. The hot air or waste gas from hot blast stove, in the fan system of pumping and goes into vertical coal mill, and fully exchanges the heat with grinding coal in the vertical mill, flow the powder to air classifier and to be separated, and unqualified coarse powder falls into the grinding table to be grinded again, qualified coal powder will goes into the explosion proof air box pulse dust collector with the airflow and being collected, through the grid round are discharged into the powder bunker. The debris in the raw coal, such as partial coal gangue, metal block, etc., will be discharged out through the wind ring, spit slag . In the process of production, there are oxygen and carbon monoxide detection device, when grinding the highly volatile coal, there is a nitrogen system and carbon dioxide fire extinguishing system, safe and reliable.

Vertical Coal Mill Working Principle:

Full set of vertical mill consists of: main unit, bucket elevator, adjustable hopper, sealed constant feeder, air heating furnace, dust remover, blower and silencer.

The motor drives the grinding table to rotate by reducer, and the hot air goes into the inner part of machine at the same time. The materials fall down to the center of grinding table from feed opening. Driven by the centrifugal force, materials move evenly to the edge of the grinding table, and they are grinded by the rollers when going through the rollers’ track. Bulk materials are crushed, while fine materials form material bed after being squeezed and experience intergranular crushing. Grinded materials move on to edge of the grinding table until being taken away by strong airflow at the wind ring, in which larger materials fall to the grinding table by gravity and reground. The others enter the separator being graded. Under the influence of separator blades, materials that do not meet fineness requirements return to the grinding table to be grinded, while the standard ones go into dust collector through the pipes and are discharged as finished products from the discharge device. Irons and other impurities, which cannot be lifted by the wind for weight, move together with materials to the edge of grinding table and fall to the lower cavity, and then they are scraped i1 Setnto the slag discharge opening by stripper plate which is fixed at the bottom of the grinding plate and discharged out of the machine.

LM Series Coal Vertical Mill Technical Parameters:

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Training System:

Provide professional staff training for customers

• Service engineer offers spot training and production line operation manual.
• After-sales personnel visit customers on a regular basis.
• Design engineer provides professional service for customers for free.

Company Information: