The limestone used for cement production requires a particle size of 30-80 mm. The chemical composition requirements are shown in the table below.
China's cement limestone ore is of good quality. Some larger cement limestone mines require only simple crushing and sieving of the ore to obtain a qualified product. Some limestones with good crystallinity, high whiteness and pure quality can be processed into super coarse calcium carbonate by superfine pulverization, or calcined into lime, and then carbonized to obtain precipitated (light) calcium carbonate.
The production process of general cement limestone mine is: raw ore → smashing → vibrating screening → large (or small) limestone. For limestone containing clay or mud, it is necessary to introduce a washing process before crushing.
The processing technology of heavy calcium carbonate is firstly crushed by high-quality limestone, processed into powder by wet grinding (or dry grinding), and then processed by filtration, drying and ultra-fine pulverization. Dry grinding does not require filtration and drying.
The limestone coarse crushing generally adopts the jaw crusher, and the medium and fine crushing adopts the cone crusher , the impact crusher , the hammer crusher, etc., the ultrafine crushing common high pressure roller mill, the high speed impact mill, the jet mill and the like. Limestone washing is generally carried out by a cylinder washing machine or a tank washing machine.
Crown Ether,Aza Crown Ether,Sodium Crown Ether,Potassium Crown Ether
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