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In which type of machine is the coal reduced to fine powders?

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In which type of machine is the coal reduced to fine powders?

(a) Blender

(b) Crushers

(c) Grinder

(d) Rollers

I have been asked this question in my homework.

Origin of the question is Pulverised Fuel Burning topic in portion Steam Power Plant of Energy Engineering

1 Answer

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The correct option is (c) Grinder

For explanation I would say: Coal is reduced to fine powder in grinding mill. Coal is pulverized to increase its surface exposure. The pulverization of coal means of exposing a large surface area of the coal to action of oxygen and consequently accelerates combustion.

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