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What is micro silica vapor?
Also known as silica or condensed fume, fume is a form of silica. The mine thermoelectric oven produces many gases, including SiO2 and Si, when ferroalloys (metal silica) are used to melt ferrosilicon. It is formed 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 mainly utilized to prepare high-temperature materials such as ceramics and ladles, wear-resistant high-temperature 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 strengths are 260.93MPa & 21% respectively. The micro-silica can improve the fluidity of the refractory, the bulk density, and the strength. It also improves the cohesion, high-temperature performances, and extends 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. The unit energy consumption of the product is unchanged, but the silicon recovery rate appears to be normal. Elkem in Norway will agglomerate micro-silica with water into pellets about 4 cm long, which are then reduced and smelted directly in an electrical furnace without any roasting or drying. Sintered ore can also be produced at high temperatures 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 the microsilica powder slurry as a return silicon source. It was mixed with chromium ores to form pellets. 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 a very extensive application.
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