Why is silica the raw material of quartz refractory and ferrosilicon?
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Author : Lzh
Update time : 2023-02-05 12:28:37
What is silicon dioxide? Silicon Dioxide minerals refer to minerals with the same chemical formula (SiO) but different structures. These minerals are called isomorphs, mainly quartz, cristobalite, and tridymite. These minerals are mainly found in the earth's granite, sandstone, and chert but are almost absent on the moon. The main reason is that the moon has formed a low-silicon and high-aluminum lunar shell in the evolution of chemical composition; high-silicon granitic rocks are extremely rare: the moon lacks a water system and hot water system that can crystallize Silicon Dioxide minerals like the earth in its evolution. Although Silicon Dioxide minerals are extremely rare in lunar rocks, studying the classification and genesis of lunar rocks is of great importance.
Suggestion for Silicon Dioxide consumption FAO/WHO (2001) stipulates that the maximum use is for milk powder, cocoa powder, sweetened cocoa powder, edible sodium fat, and cocoa butter, and the amount is 10mg/kg. Cream fat is 1g/kg. Sugar powder, glucose powder, soup powder, and soup block are used for coating. The United States FDA stipulates that this product's maximum use as an anti-caking agent is 2%. GB 2760-2011. National Food Safety Standard for the use of food additives: it is required to be used for egg powder, milk powder, cocoa products, dehydrated protein products, sugar powder, and vegetable fat powder; the maximum use of solid drinks, pregnant and lying-in women's formula food is 15g/kg spices, 20g/kg solid compound condiments, 0.025g/kg bean products processing. In addition to the above, China also has tricalcium phosphate as an anti-caking agent, commonly used in milk powder and cream powder, the most effective use is 10.0g/kg, wheat flour, the maximum use is 0.03g/kg compound condiments, the maximum use is 20.0g/kg solid drinks, the maximum use is 8.0g/kg fried small food, The maximum usage is 2.0g/kg.
Preparation of Silicon Dioxide High-gravity method: High-gravity method refers to preparing nanoparticles in a high-gravity reactor. Put a certain concentration of water glass solution in a high-gravity reactor after static filtration, raise the temperature to the reaction temperature, add flocculant and surfactant, start the rotating packed bed and liquid material circulating pump to continuously stir and recycle; after the temperature is stable, add CO2 gas for reaction, and at the same time take samples regularly to determine the pH value of the material, When the pH value is stable, stop the air intake. Add acid to adjust the pH value of the feed solution, and keep it warm and aged. Finally, the Silicon Dioxide powder with a particle size of 30 nm is prepared through washing, filtration, drying, grinding, sieving, and other operations. The nano-Silicon Dioxide particles prepared by the super-gravity method are uniform, and the average particle size is less than 30 nm. In the super-gravity environment, the mass transfer and micro-mixing processes have been greatly strengthened, greatly reducing the reaction time.
Price of Silicon Dioxide Silicon Dioxide particle size and purity will affect the product's price, and the purchase volume can also affect the cost of Silicon Dioxide. A large amount of large amount will be lower. The price of Silicon Dioxide can be found on our company's official website.
Silicon Dioxide supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Silicon Dioxide, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Silicon Dioxide, you are welcome tocontact us or inquire at any time.
