The raw materials of silica black mainly include wollastonite, opal, halloysite, olivine, serpentine, kaolin, hard kaolin, coal gangue and fly ash.
There are two main methods for preparing silica: precipitation method and gas phase method. The precipitation method is to chemically extract silica powder. The specific steps include reacting quartz sand with soda ash at high temperatures to produce industrial water glass, then adding acid to precipitate the silica, and then cleaning, filtering, drying, crushing, etc. Products made from craftsmanship. The gas phase method uses chemical vapor deposition method, using silicon tetrachloride, oxygen and hydrogen to react at high temperature to generate extremely fine silica particles, which are processed by aggregation, separation and deacidification to obtain the finished product. The main difference between the two methods is particle size and purity. Fumed silica is usually nanometer-sized and higher in purity, while precipitated silica is micron-sized and lower in purity.
White carbon black is widely used and is mainly used in the rubber industry as a reinforcing agent, especially in the manufacture of white, colored and light-colored rubber products. In addition, silica is also used in insulation materials, lubricants and other fields because of its good electrical insulation and mechanical strength.