grinding mill


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Related to grinding mill: Ball mill, Grain mill

grinding mill

[′grīn·diŋ ‚mil]
(lapidary)
A lathe designed for lapidary work.
(mechanical engineering)
A machine consisting of a rotating cylindrical drum, that reduces the size of particles of ore or other materials fed into it; three main types are ball, rod, and tube mills.

Grinding mill

A machine that reduces the size of particles of raw material fed into it. The size reduction may be to facilitate removal of valuable constituents from an ore or to prepare the material for industrial use, as in preparing clay for pottery making or coal for furnace firing. Coarse material is first crushed.

Grinding mills are of three principal types, as shown in the illustration. In ring-roller pulverizers, the material is fed past spring-loaded rollers. The rolling surfaces apply a slow large force to the material as the bowl or other container revolves. The fine particles may be swept by an air stream up out of the mill. In tumbling mills the material is fed into a shell or drum that rotates about its horizontal axis. The attrition or abrasion between particles grinds the material. The grinding bodies may be flint pebbles, steel balls, metal rods lying parallel to the axis of the drum, or simply larger pieces of the material itself. In hammer mills, driven swinging hammers reduce the material by sudden impacts. See Crushing and pulverizing, Pebble mill, Tumbling mill

References in periodicals archive ?
has commissioned Loesche with the delivery of two vertical roller grinding mills for the new INVECEM Industria Venezolana del Cemento plant in Monay, Venezuela.
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The photos include boy workers at a grinding mill in 1859, munitions workers from 1917, teenagers at a bus stop in 1956 and British Steel foundry workers from 1963.
The photographs include boy workers at a grinding mill in 1859, munitions workers from 1917, teenagers at a bus stop in 1956 and British Steel foundry workers from 1963.
Other recyclers are using such machines not as an alternative to grinders but as a primary machine that prepares material for further size reduction in a grinding mill.
The plant and machinery were imported from Mitsubishi Corporation of Japan while the slag grinding mill was supplied by Heavy Mechanical Complex.
The US Federal Trade Commission has approved Outokumpu's acquisition of the grinding mill business (earlier Nordberg's mill business) from Metso Corporation.