Silicon metal (Si Metal), also known as crystalline silicon or industrial silicon, is mainly used as an additive for non-ferrous alloys. Silicon metal is smelted from silica and carbonaceous reducing agents in a submerged arc furnace. It is an important industrial raw material. The main component is silicon, and other impurities are iron, aluminum, calcium, etc. Silicon metal can be used for steelmaking, cast iron, and aluminum (production of aviation, aircraft and automobile parts). Industrial silicon is purified through a series of processes to produce polycrystalline silicon and monocrystalline silicon for use in the photovoltaic industry and the electronics industry. Due to its wide application, Silicon metal is known as the “salt” of modern industry

Silicon metal lumps are produced from quartz and coke in an electric heating furnace. Quartz will undergo oxidation and reduction and become molten silicon liquid. Once cooled, it will turn into a solid as we can see. The chunks of raw silicon metal are very large. It is then made into smaller pieces, which we call standard sizes. The size of silicon metal lumps is 10-100mm， silicon metal powder (particle size 100, 200, 325 mesh).

Silicon metal is usually classified according to the content of the three main impurities of iron, aluminum, and calcium contained in the metal silicon component. According to the content of iron, aluminum, and calcium in metallic silicon, metallic silicon can be divided into different grades such as 553, 551, 441, 421, 411, 3303, 2502, 2202, and 1101.

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