Yuan Lei's Little Knowledge | Use of Heavy Calcium Carbonate

Release time:

2024-01-29 09:34

Heavy calcium carbonate, referred to as heavy calcium, is colorless, tasteless white powder, almost insoluble in water, insoluble in alcohol. In case of dilute acetic acid, dilute hydrochloric acid and dilute nitric acid, the bubble will boil and dissolve. Heating to 898°C began to decompose into calcium oxide and carbon dioxide.

Heavy calcium carbonate is made by grinding natural carbonate minerals such as calcite, marble and limestone. It is a commonly used powder inorganic filler, with high chemical purity, large inertness, not easy to chemical reaction, good thermal stability, no decomposition below 400 ℃, high whiteness, low oil absorption rate, low refractive index, soft, dry, no crystal water, low hardness, low abrasion value, non-toxic, tasteless, odorless, good dispersion and so on.

Heavy calcium carbonate is used as a filler, widely used in artificial floor tiles, rubber, plastics, paper, coatings, paints, inks, cables, construction supplies, textiles, feed and other daily chemical industries; as a filler to increase the volume of products, Reduce production costs. Used in rubber, it can increase the volume of rubber, improve the processability of rubber, play a semi-reinforcing or reinforcing role, and adjust the hardness of rubber.



Heavy calcium powder for 1. coal-fired power generation industry

Coal-fired power plants will use heavy calcium carbonate powder in flue gas desulfurization. Flue gas desulfurization is to synthesize calcium sulfite from heavy calcium carbonate and sulfur dioxide produced in the process of coal combustion, and then contact with air to oxidize into gypsum (calcium sulfate), which can effectively reduce the emission of sulfur dioxide from coal-fired power plants by 90%. And the production of desulfurization gypsum products can be sold directly to the cement plant or gypsum board factory. The amount of calcium carbonate desulfurization powder is related to the sulfur content in coal, usually 40000 tons of desulfurization powder per year for 300000 kilowatts of coal-fired power plants.

Heavy calcium powder for 2. rubber industry

Heavy calcium carbonate is one of the most widely used fillers in the rubber industry. Heavy calcium is filled in a large amount of rubber, which can increase the volume of its products and save expensive natural rubber, thereby greatly reducing costs. Heavy calcium filled in the rubber, can obtain higher than pure rubber sulfide tear strength and wear resistance.

Heavy calcium powder for 3. plastics industry

Heavy calcium carbonate powder for plastic masterbatch and color masterbatch is 400 mesh, and the whiteness is required to remain unchanged after high temperature heating. The ore structure is large crystal calcite, calcium carbonate content: 99%, whiteness: 95%. Heavy calcium in plastic products can play a skeleton role, the stability of the size of plastic products have a great effect, but also improve the hardness of the products, and improve the surface gloss and surface smoothness of the products.

Heavy calcium powder for 4. paint industry

Heavy calcium carbonate powder used in latex paint is 800 mesh or 1000 mesh, whiteness: 95%, calcium carbonate: 96%. The amount of heavy calcium in the paint industry is also large, for example, the amount of thick paint is more than 30%.

Heavy calcium powder for 5. waterborne coatings industry

Heavy calcium carbonate powder for water-based coating is 800 mesh or 1000 mesh, whiteness: 95%, calcium carbonate: 96%. Heavy calcium plays a great role in the water-based coating industry, which can make the coating have the characteristics of non settling, easy dispersion and good gloss. The dosage in water-based coating is 20-60%.

Heavy calcium powder for 6. paper industry

Heavy calcium carbonate powder for papermaking is 325 mesh, whiteness requirement: 95%, calcium carbonate content: 98%, heavy calcium plays a very important role in papermaking industry, can ensure the strength and whiteness of paper, and the cost is low.

Heavy calcium powder for 7. feed and fertilizer industry

In the feed industry, heavy calcium powder is used as a calcium additive to replace the original shell powder and reduce costs. In the fertilizer industry, heavy calcium powder with different whiteness is used to form fertilizer particle size and adjust color.

Heavy calcium powder for 8. construction industry (dry powder mortar, concrete)

Heavy calcium carbonate powder for dry powder mortar is 325 mesh, whiteness requirement: 95%, calcium carbonate content: 98%. Heavy calcium plays an important role in concrete in the construction industry, which can not only reduce production costs, but also increase the toughness and strength of the product.

Use, calcium carbonate, rubber, industry, heavy calcium powder, coal, paint, 95, role, dosage

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