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In which type of machine is the coal reduced to fine powders?(a) Blender(b) Crushers(c) Grinder(d) RollersI 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

Answer»

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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