New ultra-fine powder materials, nano-calcium carbonate has great development potential
Nano-calcium carbonate, also known as ultra-fine calcium carbonate and ultra-fine calcium carbonate, belongs to a new type of ultra-fine solid powder material. Nano-calcium carbonate has the advantages of fine particle size, high whiteness, good compatibility, and good optical properties.
Nano calcium carbonate is used in a wide range of fields, including paper industry, medical and health care, rubber products, coatings and plastics. Nano-calcium carbonate accounts for a large proportion in the plastics market and can be used as a plastic regulator and reinforcing agent. Nano-calcium carbonate has excellent dispersibility, can improve the anti-aging and impact strength of plastics, and is widely used in PVC film materials.
my country’s nano-calcium carbonate industry started in the 1980s and entered the stage of industrial production in the late 1980s. Non-freezing method, multi-stage spray carbonization method, intermittent carbonization method, high gravity method, internal circulation carbonization tower preparation method, jet absorption method, etc. are the main preparation methods of nano calcium carbonate in my country. The batch carbonization method can be subdivided into two types: the intermittent stirring carbonization method and the intermittent bubbling carbonization method. At present, the intermittent bubbling carbonization method is the most widely used preparation method in the world. In recent years, with the efforts of leading enterprises, some nano-calcium carbonate production technologies in my country have reached the advanced level overseas.
The raw material of nano-calcium carbonate is limestone. my country is the country with the most abundant limestone resource reserves in the world, accounting for nearly 70.0% of the world’s total reserves. my country’s limestone resources are concentrated in Shandong, Anhui, Henan, Hebei, Shaanxi, Gansu and other places.
But at present, functional nano-scale calcium carbonate is far from meeting market demand. Different users have different requirements for products, not only depending on particle size, but also product performance and quality. At present, there are not only calcium carbonate with various particle sizes, but also various types of calcium carbonate. There are 50-60 varieties of calcium carbonate with various functions. For example, OT calcium, which is specially used for ink, still occupies the high-end ink market in China, which is worth pondering. Researchers and manufacturers engaged in nano-scale materials should work hard on the application performance of nano-scale inorganic powder materials to develop functional and special nano-scale inorganic functional materials.