Heavy calcium carbonate

Heavy calcium carbonate is called heavy calcium for short. It uses limestone as raw material and is processed into white powder by lime mill. Its main component is CaCO3. Heavy calcium has the characteristics of high whiteness, good purity, soft color and stable chemical composition. Heavy calcium is usually used as filler, and is widely used in the daily chemical industry such as artificial floor tiles, rubber, plastics, paper making, coatings, paints, inks, cables, building supplies, food, medicine, textiles, feed, toothpaste, etc. As a filler, it can increase the volume of products and reduce production costs. Used in rubber, it can increase the volume of rubber, improve the processability of rubber, play the role of semi reinforcement or reinforcement, and adjust the hardness of rubber.

1、 Application characteristics of the heavy calcium powder

The application characteristics of the heavy calcium powder are: ① Because of the small specific surface area and oil absorption value, it is easy to mix with the resin; ② At the same filling amount, the volume of filling material is small and the density is large; ③ The types and contents of impurities in different raw materials are different, and the color of products is unstable. The light calcium carbonate has good applicability because it can adjust the crystal shape of particles according to different application requirements; Due to large settlement volume or small bulk density, the volume of products can be increased under the same filling amount; Due to less impurities, the color difference of the product is uniform; Due to the small primary particle size, the mechanical properties of the filler material are better at the same filling amount; However, due to the large specific surface area and oil absorption value, the resistance is large when mixed with resin (it is difficult to mix).

The role of heavy calcium powder in various industries:

1. Heavy calcium powder used in rubber industry. Heavy calcium carbonate powder for rubber is 400 mesh, whiteness: 93%, calcium carbonate content: 96%, calcium carbonate is one of the fillers used in rubber industry in large amount. A large amount of calcium carbonate is filled in the rubber, which can increase the volume of its products and save expensive natural rubber, thus greatly reducing the cost. Calcium carbonate filled in rubber can obtain higher tensile strength, tear strength and wear resistance than pure rubber sulfide.

2. Heavy calcium powder used in plastic industry. The 400 mesh heavy calcium carbonate powder (heavy calcium powder) used for plastic masterbatch and color masterbatch is required to have the same whiteness after high temperature heating. The ore structure is large crystalline calcite, with calcium carbonate content of 99% and whiteness of 95%. The calcium carbonate can play a skeleton role in plastic products, play a great role in the stability of plastic products, improve the hardness of products, and improve the surface gloss and flatness of products. As the whiteness of calcium carbonate is above 90, it can also replace expensive white pigments.

3. Heavy calcium powder used in paint industry. Heavy calcium carbonate (heavy calcium powder) for paint and latex paint is 800 mesh or 1000 mesh, with whiteness of 95% and calcium carbonate of 96%. The amount of calcium carbonate used in paint industry is also large, such as more than 30% in thick paint.

4. Heavy calcium powder used in waterborne coatings industry. Heavy calcium carbonate (heavy calcium powder) for waterborne coatings is 800 mesh or 1000 mesh, whiteness: 95%, calcium carbonate: 96%. Calcium carbonate is more widely used in the waterborne coatings industry, which can make the coatings non settling, easy to disperse, and have good luster. The amount of calcium carbonate used in waterborne coatings is 20-60%.

5. Heavy calcium powder is used in paper industry. Heavy calcium carbonate (heavy calcium powder) for paper making is 325 meshes, the whiteness requirement is 95%, and the calcium carbonate content is 98%. It plays an important role in the paper industry. It can ensure the strength and whiteness of the paper, and the cost is low.

6. Heavy calcium powder used in construction industry (dry mortar, concrete). Heavy calcium carbonate (calcium carbonate powder) for dry mortar is 325 meshes, the whiteness requirement is 95%, and the calcium carbonate content is 98%. Calcium carbonate plays an important role in concrete in the construction industry. It can not only reduce the production cost, but also increase the toughness and strength of the product.

7. Heavy calcium powder in fireproof ceiling industry. Heavy calcium carbonate (calcium carbonate powder) for fire ceiling is 600 meshes, the whiteness requirement is 95%, and the calcium carbonate content is 98.5%. Calcium carbonate is needed in the production process of fire ceiling, which can improve the whiteness and brightness of products, and the fire resistance performance will also increase.

8. Heavy calcium powder is used in artificial marble industry. Heavy calcium carbonate (heavy calcium powder) for artificial marble is 325 meshes, the whiteness requirement is 95%, the calcium carbonate content is 98.5%, and it is pure without impurities. At present, calcium carbonate has been widely used in the production of artificial marble.

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

10. Heavy calcium powder for feed industry. The feed industry uses 325 meshes of heavy calcium carbonate (heavy calcium powder), the whiteness requirement is 95%, the calcium carbonate content is 99%, and it is pure without impurities. Calcium carbonate can increase the calcium content in feed and improve feed quality.