The production process of ferrosilicon
Iron is the ferroalloy made up of iron and silicon. Ferrosilicon is an iron-silicon alloy made from coke, steel scrap, quartz (or silica) as raw material and smelted in an electric furnace. As silicon and oxygen are easily synthesised into silicon dioxide, ferrosilicon is commonly used in steelmaking as a deoxidiser, and because SiO2 gives off a lot of heat when it is generated, it is also beneficial to raise the temperature of the steel while deoxidising. At the same time, ferrosilicon can also be used as an alloying element to join the agent, widely used in low alloy structural steel, spring steel, bearing steel, heat-resistant steel and electrical silicon steel, ferrosilicon in the production of ferroalloys and chemical industry, commonly used as a reducing agent.
Silicon (known as Si in Taiwan and Hong Kong) is a chemical element whose chemical symbol is Si, formerly known as Si. It has an atomic number of 14 and a relative atomic mass of 28.09. It has two isomorphs, amorphous and crystalline, and the isomorphs are amorphous silicon and crystalline silicon. It is a metalloid element of group IVA on the periodic table.
Crystalline silicon is steel-grey in colour and amorphous silicon is black in colour, with a density of 2.4 g/cm3, a melting point of 1420°C and a boiling point of 2355°C. Crystalline silicon is an atomic crystal, hard and lustrous, with semiconducting properties. Silicon is chemically active and can be combined with oxygen and other elements at high temperatures. It is insoluble in water, nitric acid and hydrochloric acid, but dissolves in hydrofluoric acid and lye, and is used to make alloys such as ferrosilicon and silicon steel. Silicon is extremely widespread in nature, containing about 27.6% of the earth's crust, mainly in the form of silicon dioxide and silicates. Crystalline silicon is dark black-blue, brittle and a typical semiconductor. It is chemically very stable. At room temperature, it is difficult to react with substances other than hydrogen fluoride.
