The Properties and Main Application Fields of Microsilica

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What is micro silica vapor?
Micro-silica Also known as silica or condensed fume, fume can be produced by ferroalloys. The mine thermoelectric oven produces many gases, including SiO2 and SiO2, when ferroalloys (metal silica) are used to melt ferrosilicon. It is produced through rapid oxidation. It is produced by large-scale industrial melting. It is necessary to recycle this entire process with the help of dust removal equipment and environmental protection gear. Encryption equipment is needed because of the low density.

What are the main applications of microsilica?

It is used widely in the refractory industries because it has excellent properties like high refractoriness. It is primarily used for the preparation of high-temperature materials such as ceramics, ladles, high-temperature wear resistant materials, breathable blocks, refractory castings, etc. Wang Tao et al. By using micro-silica and Al2O3 powder in a 3:2.5 ratio and a 1450degC sintering heat, they prepared high-purity mullite porous ceramics. Its compressive strength is 260.93MPa. The porosity of the material is 21%. The micro-silica can improve bulk density, strength, cohesion at high temperatures, and extend the service life.
Some North America firms also use silica and microsilica fume mixed granules as raw material for electric furnaces reduction and silicon melting. They found the silicon recovery is normal, while the unit product’s energy consumption remained the same. Elkem in Norway will wet micro-silica with water and agglomerate into pellets about 4 cm. These can then be reduced and smelted directly in an electrical furnace, without roasting and drying. Sintered ore can be produced at a higher temperature without any problems such as bursting. In a Russian factory, micro-silica fumes and liquid waste from paper pulp are mixed into pellets. They then undergo reduction smelting using an electric furnace. This production shows that pellets can be transported without breaking because they’re stronger than normal materials. In Northern Europe, an enterprise that produces chromium used micro-silica slurry from the wet method of silicon smelting in electric furnaces as a return silicon source. It was then mixed with ore for pelletization. The micro-cassia was found to improve the cohesiveness of chromium pellets.

The majority of companies in the metalworking industry use microsilica fume to return materials. While this method can reduce environmental pollution due to micro-silica, it doesn’t fully exploit the magical properties of micro-silica. This is an extensive use.

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