Spiral separators, which are also called spiral concentrators, are gravity devices that separate minerals of different specific gravity according to their relative movement in response to gravity, centrifugal force and other forces in the fluid medium.
A cement mill is the equipment used to grind the hard, nodular clinker from the cement kiln into the fine grey powder that is cement.
In coal-fired power plants coal mills are used to pulverize and dry to coal before it is blown into the power plant furnace.
A rotary kiln is a device that supplies tremendous amounts of heat in order to change the chemical composition of an object.
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