Brief introduction:
Silicon powder: It is a kind of silver gray or dark gray powder with metallic luster. With the characteristic of high melting point, good heat resistance, high resistivity and high antioxidant effect. It is the basic raw material to refractiry industry,such as refractory castables,stopper rod.
Features and usage:
Silica powder known as "Silica Fume", Microsilica or Silica Fume is an amorphous, powdered Silica (SiO 2) collected after Silica vapour oxidation.In the process of high temperature smelting of industrial silicon and ferrosilicon by industrial electric furnace, the smoke and dust released by waste gas is collected and treated by special collecting device.In the smoke that coming out from the furnace, SiO2 content is about 90% of the total smoke, and it is very small in size. The average particle size is as small as nanometer, so it is called silicon powder.A lot of micro silicon powder is mainly used for cement and concrete admixtures, in order to improve the performance of cement or concrete, dispensing with super-high strength (C70), wear-resisting, scouring resistance, corrosion resistance, infiltration resistance, frost resistance, special concrete early strength used in dam, large reservoirs, harbor wharf, railway bridge, highway, airport runway, tunnel and super-tall building and other projects.At the same time, micro-silicon powder can also be used in the production of refractory materials and ceramic products to improve the strength and durability of products;It can be used as filler of paint, coating, resin, rubber and other macromolecule materials to improve the comprehensive properties of materials.It is not toxic by itself, but long-term inhalation of large amounts of dust containing free silica can cause silicosis, a disease characterized by extensive nodular fibrosis of the lungs.
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Item |
Chemical composition(%) |
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|
Si |
Fe |
Al |
Ca |
|
|
Silicon powder special for refractory |
99.0%min |
0.40%max |
0.40%max |
0.2%max |
|
98.5%min |
0.50%max |
0.50%max |
0.3%max |
|
|
98.0%min |
0.60%max |
0.50%max |
0.30%max |
|
|
Normal |
99.0%min |
0.20%max |
0.20%max |
0.02%max |
|
99.0%min |
0.40%max |
0.20%max |
0.10%max |
|
|
99.0%min |
0.40%max |
0.10%max |
0.10%max |
|
|
99.0%min |
0.30%max |
0.30%max |
0.10%max |
|
|
99.0%min |
0.40%max |
0.20%max |
0.10%max |
|
|
99.0%min |
0.40%max |
0.10%max |
0.10%max |
|
|
Low grade Si powder |
90.0%-97.0% |
Impurity content max 8.0% |
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