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Types of calcium carbonate

Industrial calcium carbonate, edible calcium carbonate and medicinal calcium carbonate.

Types of industrial calcium carbonate: heavy calcium carbonate (heavy calcium carbonate), active calcium carbonate (active calcium carbonate), light calcium carbonate (light calcium carbonate), nano calcium carbonate (nano calcium carbonate).

Calcium carbonate is an inorganic compound, which is the main component of limestone. Its molecular formula is CaCO3, and its relative molecular weight is 100.09

Meaning of heavy calcium carbonate: heavy calcium carbonate, also known as grinding calcium carbonate (GCC), is made by directly crushing natural calcite and limestone by mechanical method. Because of its small settling volume (1.1-1.9ml / g / g), it is called heavy calcium carbonate.

The meaning of light calcium carbonate: light calcium carbonate, also known as precipitated calcium carbonate (PCC), is made by chemical processing. Because its settling volume (2.4-2.8 ml / g) is larger than that of heavy calcium carbonate, it is called light calcium carbonate.

The meaning of activated calcium carbonate: activated calcium carbonate is obtained by modification on the basis of ordinary calcium carbonate, so as to achieve the dual purpose of filling and modification in composite products. These modifications include the modification of crystal morphology, particle size, particle size distribution and surface properties of calcium carbonate. In order to improve its comprehensive performance.

The meaning of nano calcium carbonate: nano calcium carbonate is an important new inorganic salt product prepared by the technology of precipitation synthesis of nano powder with non-metallic ore limestone as raw material. Its particle size is 10-100nm. Because of its small particle size and good activity, it is a new type of inorganic material.

Main uses of calcium carbonate products

Rubber industry: calcium carbonate is one of the most widely used fillers in rubber industry. Calcium carbonate filled in rubber can increase the volume of its products and save expensive natural rubber, thus greatly reducing the cost. The tensile strength, tear strength and wear resistance of calcium carbonate filled rubber are higher than those of pure rubber sulfide.

Plastic industry: calcium carbonate can play a skeleton role in plastic products, which has a great effect on the dimensional stability of plastic products, can also improve the hardness of products, and improve the surface gloss and smoothness of products. Because the whiteness of calcium carbonate is more than 90%, it can also replace the expensive white pigment.

Paint industry: the amount of calcium carbonate in the paint industry is also large, for example, the amount of calcium carbonate in heavy paint is more than 30%.

Water based coating industry: calcium carbonate is widely used in the water-based coating industry, which can make the coating non settling, easy to disperse, good gloss and other characteristics, and the dosage of calcium carbonate in the water-based coating is 20-60%.

In addition, calcium carbonate plays an important role in the paper industry, improving the strength and whiteness of paper, and the cost is low. In the cable industry products, can play a certain role in insulation.

Development prospects and advantages of calcium carbonate industry

In terms of products, the market prospect is broad. First, it has a wide range of applications: calcium carbonate is divided into more than 30 varieties according to different grades and uses, and is widely used in more than 10 fields, such as plastics, plastic steel, rubber, cable, paper making, medicine, food, paint, chemical industry, etc. At the same time, with the advocacy of green environmental protection concept and the continuous maturity of nanotechnology, the market space of calcium carbonate industry will be further widened; second, the demand for consumption is large: according to relevant data, China produces more than 10 million tons of various types of calcium carbonate annually, including 6 million tons of light calcium carbonate, which is second only to the United States in production and consumption, ranking second in the world; in recent two years, the consumption of calcium carbonate in China has increased by 25% With the increasing speed, the supply of high and medium grade products is in short supply, and a large number of imports are needed. Third, the product has many uses: on the one hand, adding calcium carbonate can improve the product performance. Light calcium carbonate products can change the processing performance and mechanical properties of products, increase the surface smoothness and bending flexibility; on the other hand, increase the filling amount of calcium carbonate. The product cost can be greatly reduced. In recent years, as the cost of plastic and rubber products has increased significantly, increasing the filling amount of light calcium can reduce the cost and improve the efficiency.