Micro-silica fume is a by product of high purity quartz, coke and sawdust reduction in the production of ferrosilicon or metallic silicon during the production of complex reactions in smelting. Among them, the quartz stone and carbon at 1750 ℃, the reduction reaction to produce unstable carbon monoxide, the temperature is higher than 2160 ℃, SiO gas containing gas sent to meet the air below 1100 ℃ with oxygen reaction to produce SiO2, after cooling The formation of high-fineness particles, the filter is collected by the filter is silicon powder. The color of the micro-silica powder is between the light gray and the dark gray, SiO2 itself is colorless, its color depends mainly on the content of carbon and iron oxide, the higher the carbon content, the darker the color, the other Natural silica fume color dark. The particle size of the silica powder is less than 1um, the average particle size is about 0.1um, which is 1/100 of the diameter of the cement particles. Therefore, the silica powder can be highly dispersed in the concrete and filled with the cement particles to improve the density. Silica powder has a very high activity, can be faster and more comprehensive and hydration of hydrogen hydride hydration reaction.
1) Concrete or Shotcrete
• Increase its density and strength, improve the performance on its durability,
impact resistance, corrosion resistance, anti-permeability and frost resistance etc
2) Refractory material & Ceramics material
• Greatly improve its density, strength and high temperature performance.
3) Cementitous Repair Products (Mortars & Grouts)
• Low permeability, increase resistance from chlorides, acids, nitrates and sulfate etc
4) Oil Well Grouting
• Increase durability and compressive strength, decrease permeability, better control of gas leakage
5) Concrete Tile, roofing & wallboard,panels
• Lightweight and improve the strength
6) Polymers & rubber product
7) other application, such as waterglass industry, thermal insulation material etc.
Microsilica is used in refractory:
Microsilica in refractory enhancing the fluid of pouring refractory, reducing the volume of used water, beeasy to shape, and raising the production efficiency. Because of its untramicrostructure for gap filling, the compact and intensity of refractory gain rising by a wade margin.
Microsilica in refractory is a highly effective pozzolanic material, so it’s easy to come into being Mullite Phase, under the premise that Al2O3 exists, enhance elevated temperature strength and thermal shock of refractory.
Henan Superior Abrasives I/E Co., Ltd is one of the largest Silica Fume Suppliers in China, and also the premium source of high-performance Silica Fume products for concrete and refractory industries.
As a crucial supplier of Silica Fume, we have gained credits from our excellent guests and have been maintaining stable and long-term business cooperation with them since 2001, owing to our advanced tech, reasonable price, varied packages and good service. Our market covers Australia, America, Canada, Mid-east, Russia, Spain, South Africa, Southeast Asia and etc.
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