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grinding cement limestone

Atypical raw mix consists of 75-85% limestone,12-25% shale, thebalance consisting of silica or quartzite and iron oxide. Exact proportioning is dependent upon their chemical properties before and after calcining to cement clinker. For good kiln practice the grind required is 88-92% – 200 mesh for standard cement, 99%-200 mesh for high early. Uniform kiln feed size helps reduce tendency to form …

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