Xinyu Huayuan Wollastonite Co., Ltd., Jiangxi Wollastonite
Calcium carbonate is divided into heavy calcium carbonate and light calcium carbonate
Referred to as heavy calcium, it is made by directly grinding the ore by mechanical methods. Because the sedimentation volume of heavy calcium carbonate is smaller than that of light calcium carbonate, it is called heavy calcium carbonate.
Light calcium carbonate, also known as precipitated calcium carbonate, referred to as light calcium, is the calcination of raw materials such as limestone to produce lime (the main component is calcium oxide) and carbon dioxide, and then adding water to digest the lime to produce lime milk (the main component is calcium hydroxide), and then Carbon dioxide is added to carbonize lime milk to form calcium carbonate precipitation, which is then dehydrated, dried and crushed. Because the settling volume of light calcium carbonate (2.4-2.8mL / g) is larger than that of heavy calcium carbonate (1.1-1.4mL / g), it is called light calcium carbonate.
Active (also known as modified) calcium carbonate is produced by adding active agents (such as fatty acids, etc.) to the surface activation treatment during the production of calcium carbonate.
The difference between activated calcium carbonate and ordinary light and heavy calcium carbonate is:
Activated calcium carbonate lipophilic and hydrophobic
Ordinary calcium carbonate hydrophilic and oleophobic
So its use and usage are very different