What are the uses of heavy calcium powder?

The heavy calcium powder has abundant resources, wide distribution, simple processing technology, low price and high purity. Therefore, it is usually used as industrial filler. Widely used in artificial floor tile, rubber, plastic, paper, paint, paint, ink, cable, building supplies, food, medicine, textile, feed, toothpaste and other daily chemical industry. In addition, there are many uses of heavy calcium powder, today we will give you a specific explanation of the nature of heavy calcium powder and use in various industries.

, heavy calcium powder properties

According to different particle size, it can be divided into ordinary heavy calcium powder, super fine heavy calcium carbonate, wet grinding super fine calcium carbonate, super fine surface modified heavy calcium carbonate.

The chemical formula of calcium carbonate is CaCO3, and its crystals are mainly composed of polytripartite trihedral calcite and rhombic aragonite. Under normal temperature and pressure, calcite is stable and aragonite is quasi-stable. At present, calcite is mainly used. The proportion of heavy calcium is 2.711.

At atmospheric pressure, calcite heated to 898℃ and aragonite heated to 825℃ will decompose into calcium oxide and carbon dioxide. Calcium carbonate reacts with all strong acids to form water and corresponding calcium salts (such as calcium chloride CaCl2), and carbon dioxide is released at the same time. At room temperature (25 ℃), the concentration of calcium carbonate in water is 8.7 ×1029, the solubility is 0.0014, the pH value of calcium carbonate aqueous solution is 9.5~10.2, and the pH value of air saturated calcium carbonate aqueous solution is 8.0~8.6. Calcium carbonate is non-toxic, odorless and non-irritating. It is usually white and has a relative density of 2.7~2.9. Mohs hardness is 3 for calcite and 3.5~4 for aragonite. Calcite has three groups of rhombohedral cleavage, and aragonite also has cleavage.

The sedimentation volume of heavy calcium carbonate was 1.2~1.9ml/g, and the specific surface area was about 1m2/g. Heavy calcium carbonate due to large particles, smooth surface, small specific surface area, so the oil absorption value is low, about 48ml/100g.

Two, the use of heavy calcium powder

1, coal power industry with heavy calcium powder

Heavy calcium carbonate powder will be used in flue gas desulfurization of coal-fired power plants. Flue gas desulfurization is to combine heavy calcium carbonate with sulfur dioxide in the process of coal burning with calcium sulfite, and then contact with air to oxidize into gypsum (calcium sulfate), which can reduce sulfur dioxide emissions of coal-fired power plants by 90%. And the production of desulfurized gypsum can be directly sold to cement factories or gypsum board factories. The amount of calcium carbonate desulfurization powder is related to the sulfur content of coal, which is usually 40,000 tons per year for a 300,000-kilowatt coal-fired power plant.

2, feed, fertilizer industry with heavy calcium powder

In the feed industry fraud heavy calcium powder as calcium element addition agent, replace the original shell powder, reduce the cost.

Fertilizer industry fraud difference in whiteness of heavy calcium powder, the role of fertilizer granularity molding and color regulation

3, rubber industry with heavy calcium powder

Rubber - rubber for heavy calcium carbonate powder: 400 mesh, whiteness: 93%, calcium carbonate: 96%) Calcium carbonate is used in the rubber industry as a large filler. Calcium carbonate is filled in large quantities with rubber, which can increase the volume of its products and save expensive natural rubber, thus greatly reducing the cost. When calcium carbonate is filled into rubber, the tensile strength, tear strength and wear resistance are higher than that of pure rubber sulfide.

4, plastic industry with heavy calcium powder

Plastic - plastic masterbatch, color masterbatch with heavy calcium carbonate powder (heavy calcium powder)400 mesh, the requirement of high temperature heating whiteness unchanged, ore structure for large crystalline calcite, calcium carbonate content :99%, whiteness :95%), calcium carbonate in plastic products can play a skeleton role, has a great role in the stability of plastic products size, but also can improve the hardness of products, And improve the surface luster and surface smoothness of products. Calcium carbonate, which has a whiteness of 90 or more, can also replace expensive white pigments.

5, paint industry with heavy calcium powder

Paint - Heavy calcium carbonate (heavy calcium powder)800 mesh or 1000 mesh for latex paint, whiteness :95%, calcium carbonate: 96%) Calcium carbonate in the paint industry is also a large amount, such as the amount of more than 30% in thick paint.

6, water based coating with heavy calcium powder

Waterborne coating with heavy calcium carbonate (heavy calcium powder)800 mesh or 1000 mesh, whiteness :95%, calcium carbonate :96%,) calcium carbonate in the waterborne coating industry is more widely used, can make the coating does not settle, easy to disperse, good luster, etc., in the amount of waterborne coating is 20-60%.

7, paper industry with heavy calcium powder

Heavy calcium carbonate (heavy calcium powder) for paper making :325 mesh, whiteness requirement :95%, calcium carbonate content :98% Calcium carbonate plays an important role in the paper industry. Can ensure the strength and whiteness of paper, and the cost is low.

8, construction industry with heavy calcium powder

Dry powder mortar with heavy calcium carbonate (heavy calcium powder)325 mesh, whiteness requirements :95%, calcium carbonate content: 98%) Calcium carbonate in the construction industry in the concrete has an important role. It can not only reduce the production cost, but also increase the toughness and strength of the product.

9, fire ceiling industry with heavy calcium powder

Fireproof ceiling with heavy calcium carbonate (heavy calcium powder):600 mesh, whiteness requirements :95%, calcium carbonate content: 98.5%) Calcium carbonate is needed in the production process of fireproof ceiling, can improve the whiteness and brightness of the product, and the fire performance will also increase.

10, artificial marble industry with heavy calcium powder

Artificial marble with heavy calcium carbonate (heavy calcium powder):325 mesh, whiteness requirements :95%, calcium carbonate content :98.5%, pure without impurities) calcium carbonate has been widely used in the production of artificial marble.

11, floor drill industry with heavy calcium powder

Heavy calcium carbonate (heavy calcium powder) for floor drilling :400 mesh, whiteness requirement :95%, calcium carbonate content :98.5%, pure and free of impurities) Calcium carbonate can be used in the floor drilling industry, to increase the whiteness and tension of products, improve the toughness of products, reduce production costs.

Three, heavy calcium powder storage tips

1, because heavy calcium powder is a kind of powder, so the water absorption is larger, so do moisture-proof work is essential;

2, the main component of heavy calcium powder is calcium carbonate, to avoid it and acid substances, under appropriate conditions will occur chemical reactions, destroy its main components, affect the main work of heavy calcium powder;

3. Avoid high temperatures. Under the condition of high temperature, heavy calcium powder is easy to decompose, reduce the amount of components, reduce the effect of fruit.

In short, the storage of heavy calcium powder not only needs some experience accumulation, but also needs to master its nature and function, and do a good job of fundamental protection.

The above is the use of heavy calcium powder in various industries and storage tips. As an industrial filler, heavy calcium powder is widely used and plays a very important role in the industrial industry.