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A pulverizer or grinder or flour mill is a mechanical device for the grinding of many different types of materials. For example, a pulverizer mill is used to pulverize coal for combustion in the steam-generating furnaces of coal power plants .
The company focused its efforts in micronizing or size reduction of powder materials. The first machine patented was the Mikro-Pulverizer which accomplished powder size reduction by mechanically impacting material with the use of a hammer and screen. [6] The business outgrew its facilities in Elizabeth and moved to Roswell Park in 1932.
The raw coal is then fed into the pulverizer along with air heated to about 650 °F (340 °C) from the boiler. As the coal gets crushed by the rolling action, the hot air dries it and blows out the usable fine coal powder to be used as fuel. The powdered coal from the pulverizer is directly blown to a burner in the boiler.
A mill is a device, often a structure, machine or kitchen appliance, that breaks solid materials into smaller pieces by grinding, crushing, or cutting. Such comminution is an important unit operation in many processes. There are many different types of mills and many types of materials processed in them.
The coal in the hopper is conveyed to the coal pulverizer by screw conveyor. The coal pulverizer will crush the coal into pulverized coal. In the coal burner, the pulverized coal mixes with air (high-speed air flow is generated by the draft fan on the coal burner), and is ignited by the oil burning igniter.
Dynamic impact would occur when material is dropped into a chamber where it receives a pulverizing blow from a hammer, rotor or pin. [3] Pulverizing can be enhanced by engineering the rotor or hammer [4] to pass close to a serrated fixed stator. Pin, unifine; and VSI mills are examples of dynamic impact mills.