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Abstract Pull rods made of alloy steel are used to exert grinding pressure on the rollers in the raw grinding mill The grinding forces are transmitted vertically by three pull rods placed at into the hydraulic cylinder and foundation and horizontally by the torque rods

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A modern MPS mill design is equipped with a hydropneumatic grinding force loading system that consists of three hydraulic cylinders with one tension rod each to pull down a rigid loading frame The grinding rollers fixed to the loading frame are thus pressed against the coal bed between the rollers

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