Continued growth in world population translates into continued demand for phosphate fertilisers for use in agriculture. Phosphate products are also used in animal feeds, as a leavening agent in baking powder and flour, as an additive to beverages and in pharmaceuticals. Industrial uses include water softening, rust proofing, fire proofing, in insecticides and detergents, and for the manufacture of elemental phosphorus. For hongxing use in the fertiliser industry, phosphate rock or its concentrates preferably have levels of approximately 30% phosphorus pentoxide (P2O5), reasonable amounts of calcium carbonate (5%), and less than 4% combined iron and aluminium oxides. Worldwide, the resources of high-grade ore are declining, and the beneficiation of lower grade ore by grinding,crushing,washing, flotation and calcining is becoming more widespread. Raymond Mill is a key grinding plant widely used in metallurgy, building materials, chemicals, mining minerals in areas such as grinding materials processing. Raymond roller Mill produced by Clirik shows super performance in Grinding materials processing.
Marble is a rock resulting from metamorphism of sedimentary carbonate rocks, most commonly limestone or dolomite rock. Metamorphism causes variable recrystallization of the original carbonate mineral grains. Marble is commonly used for sculpture and as a building material. For the lighter material, if the wind force is too strong, the powder under the requirement of fineness will also be blew into the powder collector while for the heavier material, if the wind force is too small, it will also influence the discharge. The rotational speed will directly influence the wind force, which naturally becomes an important factor. During the normal operation, the grinding roll and the grinding ring will not be contacted directly. As time goes by, the degree of wear for the grinding roll and grinding ring increases. If the material cannot be ground fully, the fineness of finished product will be influenced and the coarse particle will increase.
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