The Development Trend Of The Coal Mill

Coal mill is used to efficiently blend varieties of coal with fuel oil to increase bulk density

. SBM has been concerned with coal pulverized fuel for kiln and boiler firing for many years. Our coal mill pulverizer can handle all kind coal of different grades from hard coal, woody lignite and lignite to anthracite coal and petroleum coke, we can design and complete set of coal grinding plant from dry to grinding.

One of the major usages of the coal mill or coal pulverizer is to grind coal to micro powders in order to meet the demands of the fire power plant.

Raw coal ( Crushed ) is fed through coal hopper at the top of the coal mill, and then falls down by gravity to the grinder ring to be pressed, crushed and milled into pieces by rollers. Centrifugal action forces the coal outward to the grinding ring where it is pulverized between the ring and three grinding rollers. After the first crush, coal powder fall into the second and third layer. The coarse coal powder will be brought into the classifier.

Coal mill manufacturer:

As a major coal mill manufacturer, SBM has positioned itself well to meet the challenge of supplying coal mill with reliably quality and efficiently at the lowest cost.

SBM can manufacture and supply coal mill of different types which includes ball mill, MTW trapezium mill, MTM trapezium mill, Coarse powder mill and micro powder mill, vertical coal mill etc.

Take SBM vertical coal mill for example, the coal mill is a modular and flexible design. The grinder capacity can be from 10 TPH to 50 TPH, the powder fineness is under 15%, and we allow a 3,4 roller mill to be custom built to meet the different demands, The ground product quality is consistently high irrespective of plant capacity.

Coal mill application:

One of the important application of coal mill is used in coal fired power plant all over the world.

Coal mill plays an important role in the coal-fired power plant. In coal-fired power plants coal mill is used to pulverize and dry to coal before it is blown into the power plant furnace. Usually, the coal-fired power plant has two kinds coal mill, one is ball mill, the other is vertical mill. Ball mill is to grind the coal into coarse powder and micro powder with steel balls, and the vertical mill will dry and grind the powder again.

The air flow is fed through the mill, with the purpose of heating and lift the coal particles out of the coal mill and into the boiler furnace. The coal particles are heated to 100 degrees Celsius. The temperature of the primary air flow is manipulated for controlling this temperature measured as a temperature in the mill at the exit. The primary air temperature is controlled by controlling the position of an air mixer, which mixes heated outside air and cold outside air.

by: yoyo

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