Summary of some experiences in the use of microsilica fume (silica fume)

Microsilica is not suitable for all occasions. The person who formulates the technical requirements for concrete must carefully analyze the specific application and confirm that the expected results can be obtained by using microsilica.

Uses of silicon metal

Silicon is widely used in smelting ferrosilicon alloy as an alloying element in the iron and steel industry, and as a reducing agent in the smelting of many kinds of metals. Silicon is also a good component in aluminum alloys, and most cast aluminum alloys contain silicon. Silicon is the raw material of ultra-pure silicon in the electronics industry. Electronic devices made of ultra-pure semiconductor monocrystalline silicon have the advantages of small size, light weight, good reliability and long life.

What is the use of polysilicon

Polycrystalline silicon is a form of elemental silicon. When the molten elemental silicon is solidified under the condition of supercooling, the silicon atoms are arranged into many crystal nuclei in the form of diamond lattice. If these crystal nuclei grow into grains with different crystal plane orientations, these grains will combine to crystallize into polysilicon.

Metal silicon powder prices weak steady market turnover decline

In July, the metal silicon powder market did not improve for the time being. Some enterprises adjusted the price downward to make profits for shipment. At present, the mainstream quotation in the 97 metal silicon powder market is 9800-11000 yuan/ton, while the mainstream quotation in the 98 metal silicon powder market is 10200-11300 yuan/ton, including tax. Mainstream market prices are about the same as last month.

Silicon-the cornerstone of chip materials

Silicon materials are divided into monocrystalline silicon and polycrystalline silicon according to the arrangement of the unit cells. The biggest difference between monocrystalline silicon and polycrystalline silicon is that the cell rows of monocrystalline silicon are ordered, while polycrystalline silicon is disordered. In terms of manufacturing methods, polysilicon is generally directly poured into the crucible to melt, and then cooled.

Application of Silica Fume in Commercial Concrete

Silica fume or condensed silica fume, also called microsilica fume and silica fume, is a by-product produced by the reduction of high purity quartz, coke and sawdust in the submerged arc furnace during the production of ferrosilicon or metal silicon. The main component is SiO. The color of silica fume is colorless between light ash and dark ash. Its color mainly depends on the content of carbon and iron oxide. In addition, the encrypted silica fume is darker than natural silica fume. The particle size of silica fume is less than 1μm, and the average particle size is about 0.1μm, which is 1/100 of the diameter of cement particles, so silica fume can be highly dispersed in concrete and filled between cement particles.