Hi Vernon. Thank you for your question.

Limestone is widely distributed in China and has abundant reserves. It is a valuable resource that is widely used. It is usually used as building materials, but also an important raw material for many industries. It can be used to produce portland cement, high-grade paper-making coated heavy calcium carbonate products. Besides, it can be used as plastics, coatings and other production process fillers. Moreover, limestone can help produce casting sand for machinery and desulfurizing absorbents.

The common processing technology of limestone is to use special grinding mill. The limestone can be directly ground to obtain heavy calcium carbonate. According to the grinding fineness, the limestone can be divided into four different specifications in industry: single fly powder, double fly powder, three fly powder and four fly powder, which are respectively used in various industrial sectors.

Single fly powder can be used in the production of anhydrous calcium chloride, is auxiliary materials for the production of sodium dichromate. It is also the main raw materials for glass and cement production. In addition, it can be used for building materials and poultry feed.

Double fly powder is main materials of anhydrous calcium chloride, rubber and paint white filler, as well as building materials.

Three flying powder is used as filler for plastic, putty, paint, plywood and paint.

Four flying powder is used as insulation filler for electric wire, rubber moulded products and filler for asphalt felt.

Liming Heavy Industry (Shanghai)