Vertical Coal Mill For Coal Grinding

• Coal particles are ground in a vertical coal mill by passing them between a rotating table and a number of grinding rollers. The pressure from the grinding rollers causes the coal particles on the rotating table to be crushed and ground into tiny pieces.

  There are many benefits to using a vertical coal mill for coal grinding. One of the benefits is that it allows for a more efficient and uniform coal grinding process compared to other types of coal mills. The mill’s vertical position also allows for a reduced footprint, which makes installation in confined locations simpler.

  Yet, using a vertical coal mill could potentially have certain disadvantages. For example, it may require more frequent maintenance than other types of grinding machinery. This type of coal mill may not be suitable for all types of coal. There is also a risk of explosion or fire if we maintain or use equipment improperly.

• What are the types of vertical coal mill?

  Vertical coal mills are common in the cement, steel and coal grinding industries, as well as thermal power plants. The MPS mill, the ATOX mill and LM vertical mill are the three primary varieties of vertical coal mills.

  MPS Mill:

  MPS coal mill is a common coal mill for thermal power plants. An MPS mill’s planetary gearbox, which rotates at a constant speed, powers the grinding table. Hydraulic cylinders press the rollers against the grinding table. The raw coal feed pipe feeds coal into the mill, where it is ground between the grinding table’s rollers. The dust collector then collects the ground coal that has been swept out of the mill by the air stream.

  ATOX Mill:

  The ATOX mill is a popular coal mill in the steel and cement industries. A hydraulic system provides the grinding pressure applied to the ATOX grinder rolls. Coal enters the mill through a chute. The pressure between the discs and rollers grinds the coal into a fine powder. The dust collector then collects the coal fines that fly out of the mill with the airflow.

  LM Vertical Mill:

  Another popular vertical coal mill is the LM vertical coal mill. It is useful in many different industries such as cement, electric power, metallurgy, chemical industry, non-metallic minerals and so on. Its creator is SBM, a well-known supplier of industrial mills.

  The material is ground between the grinding disc and the grinding roller of the vertical mill. This type of grinding uses rollers to exert pressure on a disc. A gear unit or a hydraulic system drives the grinding roller. Material enters the grinder through the center of the grinding disc. Then it runs outward under the action of centrifugal force. The airflow washes away the fine particles, but the coarse particles fall back onto the grinding disc for further grinding.

  The LM Vertical Mill offers the benefits of excellent grinding efficiency, low power consumption, big feed size, simple equipment process flow, and easy product fineness adjustment. It may mill a variety of substances, including talc, gypsum, barite, calcite, dolomite, and other non-metallic minerals.

  Both varieties of vertical coal mills have benefits and drawbacks. The MPS mill has a greater capacity for grinding, but it is more complicated and needs more upkeep. The ATOX mill has a lesser grinding capacity but is simpler and easier to maintain. LM Vertical Mill combines the advantages of the above two coal mills. The final choice depends on actual needs.

• How does a vertical coal mill work?

  A type of industrial machinery called a vertical coal mill is used to crush or grind material into small particles.

  The coal hopper receives raw coal when raw coal is supplied. The raw coal enters the coal feeder through the valve.

  By typically changing the speed of a conveyor belt that feeds coal into the mill, The coal feeder regulates the amount of coal received by the machine.

  The mill’s rotating grinding table and rollers combine with crushing, grinding, and impact to pulverize the coal as it enters the machine.

  Through the grind, air enters the machine, creating a fluidized bed of material. Fine particles of material are swept up by the air flow and discharged from the machine.

  Coarse particles fall back to the grinding table for further grinding. The fine particles fly out of the mill with the airflow and are collected by the dust collector.

  After that, coal become the fuel in boilers or kilns.

  In general, a grinding table and rollers rotate at a controlled pace in a vertical coal mill to crush and grind coal into a fine powder. We inject air into the mill to create a fluidized bed of material. The airflow sweeps it up and out. Coarse particles fall off for more grinding. Afterwards, pulverized coal became a fuel in many industrial processes.

Tags: coal grinding coal mill vertical mill