1. Heavy calcium powder for rubber industry-Heavy calcium powder for rubber: 400 mesh, whiteness: 93%, calcium carbonate: 96%) Calcium carbonate is one of the most widely used fillers in rubber industry.
Filling a large amount of calcium carbonate in rubber can increase the volume of its products and save expensive natural rubber, thus greatly reducing the cost. Filling calcium carbonate in rubber can obtain higher tensile strength, tear strength and wear resistance than pure vulcanized rubber.
2. Heavy calcium carbonate powder (400 mesh) for plastic masterbatch and color masterbatch used in plastic industry should have the same whiteness after high-temperature heating, and the ore structure is large crystalline calcite with 99% calcium carbonate content and 95% whiteness). Calcium carbonate can play a skeleton role in plastic products and play a great role in the dimensional stability of plastic products.
It can also improve the hardness of the product and improve the surface gloss and smoothness of the product. Because the whiteness of calcium carbonate is above 90, it can also replace expensive white pigment.
3. Heavy calcium powder coating for coating industry-heavy calcium carbonate (heavy calcium powder) for latex paint is 800 mesh or 1000 mesh, whiteness: 95%, calcium carbonate: 96%). The amount of calcium carbonate used in coating industry is also very large, for example, it is more than 30% in thick paint.
4. The heavy calcium carbonate (heavy calcium carbonate powder) used in waterborne coatings industry is 800 mesh or 1000 mesh, with whiteness of 95% and calcium carbonate of 96%. ) Calcium carbonate is widely used in water-based coatings industry, which can make the coatings not settle, easy to disperse and have good luster, and the dosage in water-based coatings is 20-60%.
5. Heavy calcium carbonate (heavy calcium carbonate powder) for paper industry: 325 mesh, whiteness requirement: 95%, calcium carbonate content: 98% The important role of calcium carbonate in paper industry is to ensure the strength and whiteness of paper, and the cost is low.
Extended data:
There are two production processes for heavy calcium carbonate.
Dry production technology: first of all, calcite, limestone, chalk, shells and so on. All the gangue shipped from the quarry is manually selected and removed; Then the limestone is coarsely crushed by a crusher, and then crushed by a Raymond mill to obtain fine limestone powder. Finally, the powder is classified by a classifier, and the powder that meets the granularity requirements is packaged and put into storage as a product, otherwise it is returned to the mill for grinding again.
Wet production process: firstly, dry fine powder is made into suspension, further crushed in a mill, and after dehydration and drying, ultrafine heavy calcium carbonate is prepared.
Baidu encyclopedia-heavy calcium carbonate