Uses of heavy calcium carbonate_Industrial additives

Overview of the uses of heavy calcium carbonate

Heavy calcium carbonate, referred to as heavy calcium, is a colorless, odorless white powder that is almost insoluble in water and insoluble in alcohol. It will boil and dissolve when encountering dilute acetic acid, dilute hydrochloric acid and dilute nitric acid. When heated to 898°C, it begins to decompose into calcium oxide and carbon dioxide. Heavy calcium carbonate is ground from natural carbonate minerals such as calcite, marble, and limestone. It is a commonly used powdery inorganic filler with high chemical purity, high inertness, not easy to react chemically, good thermal stability, will not decompose below ℃, high whiteness, low oil absorption rate, low refractive index, soft, dry and non-toxic. Containing crystal water, low hardness, low wear value, non-toxic, tasteless, odorless, and good dispersibility.

Uses of heavy calcium carbonate

Heavy calcium carbonate uses fluorophenylboric acid as filler and is widely used in artificial floor tiles, rubber, plastics, papermaking, coatings, paints, inks, cables, building supplies, food, medicine, textiles, feed, toothpaste and other daily uses Chemical industry; used as filler to increase product volume and reduce production costs. When used in rubber, it can increase the volume of the rubber, improve the processability of the rubber, act as a semi-reinforcement or reinforcement, and can adjust the hardness of the rubber.

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 coal burning process, and then oxidize it into gypsum when exposed to air. (calcium sulfate), can effectively reduce sulfur dioxide emissions produced by coal-fired power plants by up to 90%. The desulfurized gypsum produced can be sold directly to cement factories or gypsum board factories. The dosage of calcium carbonate desulfurization powder is related to the sulfur content in coal. Usually a 300,000-kilowatt coal-fired power plant requires 40,000 tons of desulfurization powder every year.

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

Plastic masterbatch and color masterbatch are made of heavy calcium carbonate powder, which requires that the whiteness remains unchanged after high-temperature heating. The ore structure is large crystalline calcite, calcium carbonate content: 99%, whiteness: 95%. Heavy calcium can play a skeleton role in plastic products, which plays a great role in the dimensional stability of plastic products. It can also increase the hardness of the products and improve the surface gloss and surface smoothness of the products.

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

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

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

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

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