Summary of light calcium carbonate
Light calcium carbonate is produced by calcination of raw materials such as limestone into raw lime (the main component is calcium oxide) and carbon dioxide, followed by the addition of water to digest lime to produce lime milk (the main component is calcium hydroxide), and then recanalization into carbonized lime milk confirmed by dioxygenation to produce calcium carbonate precipitate, Z followed by dehydration, drying and crushing.
The application of light calcium carbonate
Rubber industry: calcium carbonate is one of the early amounts of Z large fillers used in the rubber industry, calcium carbonate is filled in rubber in large quantities, can increase the volume of the product, thereby saving the expensive natural rubber for the purpose of reducing cost, calcium carbonate filled in rubber can obtain higher tensile strength wear resistance, tear strength, than pure rubber sulfide, And has significant reinforcement in natural and synthetic rubbers, while allowing for adjustments in consistency.
Plastic industry: the carbonic acid inflection can play a kind of skeleton role in plastic articles, and has a great effect on the stability of the dimensions of plastic articles, can improve the hardness of the products, and can also improve the surface gloss and surface planarity of the products. The addition of calcium carbonate heat resistance in general plastic articles can improve and also replace expensive white pigments to play a certain whitening role due to the calcium carbonate whiteness above 90%.
Paint industry: calcium carbonate has a large quantity in the paint industry and is an indispensable backbone, with over 30% in thick paint and over 39% in phenolic finely patterned wrinkled paint among 4-7% of phenolic magnetic lacquers.
Aqueous paint industry: in the aqueous paint industry, the use is more extensive, can make the coatings not sink, easy to disperse, glossy and other characteristics, in the water-based paint use is 20-60%.
In addition, calcium carbonate plays an important role in the paper industry and can guarantee the strength, whiteness, and lower cost of the paper. Can play a certain insulating role in cable industry. Also acts as a rubbing agent for toothpastes.
Perform standard light calcium carbonate
HG/T 2226-2010
Project | Indicators |
For rubber and plastic | Coating | Paper use |
Superior et al | First Grade | Superior et al | First Grade | Superior et al | First Grade |
calcium carbonate | 98 | 97 | 98 | 97 | 98 | 97 |
PH | 9.0~10.0 | 9.0~10.5 | 9.0~10.0 | 9.0~10.5 | 9.0~10.0 | 9.0~10.5 |
105 C volatiles | 0.4 | 0.5 | 0.4 | 0.6 | 1 | 1 |
Hydrochloride cannot | 0.1 | 0.2 | 0.1 | 0.2 | 0.1 | 0.2 |
Sedimentation volume | 2.8 | 2.4 | 2.8 | 2.6 | 2.8 | 2.6 |
manganese | 0.005 | 0.008 | 0.006 | 0.008 | 0.006 | 0.008 |
iron | 0.05 | 0.08 | 0.05 | 0.08 | 0.05 | 0.08 |
It can be used as a filler in rubber, plastic, papermaking, putty, primer, coating and ink industries. It is widely used in the production of organic synthesis, metallurgy, glass and asbestos. It can also be used as a neutralizer for industrial waste water, an antacid for gastric and duodenal ulcers, an antidote for acidosis, a detoxifier for sulfur dioxide in exhaust gas containing sulfur dioxide, a feed additive for dairy cows, and an anti-sticking agent for linoleum. It can also be used as a raw material for tooth powder, toothpaste and other cosmetics.
SMILES
C(=O)([O-])[O-].[Ca+2]
Jiangsu, China
