The Properties and Main Application Fields of Microsilica


What’s micro silica fume?


Micro-silica

Fume is also known as condensed silica smoke or silica fume. Many volatile SiO2 or Si gases can be produced when ferroalloys (metal silicon) are used in the smelting of ferrosilicon. Rapid oxidation, precipitation, and condensation are the main processes that produce it. It’s a result of industrial smelting. This entire process must be recycled using dust removal and equipment for environmental protection. Encryption equipment is needed because of the low density.


These are the main areas where microsilica is used

It has exceptional properties like high refractoriness, and it is used extensively in the refractory sector. This is used to create high-temperature ceramics. Wang Tao et al. By using pressureless sintering and microsilica powder, high-purity porous Mullite Ceramics were made. They underwent gel injection molding with micro-silica powder. Their ratio was Al2O3 and SiO2 3:1 and their sintering temperature at 1450degC. It has a compressive strength of 260.93MPa and 21% respectively. Micro-silica fume is capable of improving the bulk density, fluidity and strength of refractory material, as well as the high-temperature and cohesion performance. It also allows for internal digestion, clean production and the removal of industrial silicon and ferrosilicon smelting companies.

North America-based companies may also utilize silica fume mixed pellets, as well as micro-silica fume combined pellets, for silicon smelting and electric furnace reduction. Their results showed that silicon recovery rates are normal. However, the unit product energy use is not affected. Elkem Norway can wet micro-silica powder using water. Then, it will agglomerate the material into about four cm long pellets that can then be reduced to a smaller size and heated in an electric furnace. This is done without any drying or roasting. Also, the pellets can be sintered at high temperatures. There is no risk of the product’s strength being reduced by bursting. Russian company mixes microsilica fumes with waste paper pulp to create pellets. They then reduce the smelting process in an electrical furnace. They are much stronger than regular materials and are difficult to transport. This is evident from the results of this production. One ferrochromium firm used microsilica powder slurry from the electric furnace silica smelting process wet as its return silicon source. It was then combined with chromium to form pellets. It was shown that the micro-cassia powder can improve the consistency of the chromium ore pellets.

Many companies use microsilica fume in their metallurgical industries as a back material. While this reduces the impact of microsilica fume on the environment, it is not able to fully exploit its magical properties. This is a broad application.

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