"Metal Silicon" (also known as industrial silicon in China) was a commodity name that appeared in the middle of the 60 's. Its emergence is related to the rise of the semiconductor industry. The international practice is to divide the commodity silicon into metal silicon and semiconductor silicon. Metal silicon is made of quartz and coke in the electric furnace smelting into the product, the main component of silicon content in about 98% (including Si 99.99% is also included in the metal silicon), the remaining impurities for iron, aluminum, calcium and so on. Semiconductor silicon is used for the fabrication of high purity metal silicon for semiconductor devices. is a polycrystalline, single crystal form for sale, the former price, the latter price ang. Divided into a variety of specifications because of their different uses.
According to statistics, the world consumed about 500,000 tons of metal silicon in 1985, of which the metal silicon for aluminum accounted for about 60%, for less than 30% of the silicone, used for about 3% of semiconductors, the rest for steel smelting and precision ceramics.