Ferrosilicon: Ferrosilicon is made from coke, steel scrap, quartz (or silica) and smelted using an electric furnace. Silicon and oxygen can be easily synthesized into silica. Therefore, ferrosilicon is often used as a deoxidizer for steelmaking. At the same time, since SIO2 generates a large amount of heat during its deoxidation, it is also beneficial to increase the temperature of molten steel. Ferrosilicon is used as an alloying element additive. Widely used in low-alloy structural steel, composite steel, spring steel, bearing steel, heat-resistant steel and electrical silicon steel, ferrosilicon in ferroalloy production and chemical industry, often used as reducing agent. The silicon content reaches 95%-99%. Pure silicon is commonly used to make monocrystalline silicon or to formulate non-ferrous metal alloys.
Ferromanganese: Ferromanganese is made from manganese ore. It is smelted in a blast furnace or an electric furnace. Ferro-manganese is also a commonly used deoxidizer in steel, and manganese also has the effect of desulfurization and reducing the harmful effects of sulfur. Therefore, almost all kinds of manganese are contained in various steels and cast irons. Ferromanganese also serves as an important alloying agent. Widely used in structural steels. Tool steel, stainless heat-resistant steel. Wear-resistant steel and other alloy steels.
Other ferroalloys: except ferrosilicon and ferromanganese. There are many other kinds of ferroalloys, such as ferrochromium, ferro-tungsten, ferromolybdenum, ferrotitanium, vanadium iron, ferroboron, silicon-calcium alloy, and the like. Most of these ferroalloys are smelted in an electric furnace. Some of their alloys are relatively rare or expensive due to their relatively complex production processes. Therefore, they are not used as deoxidizers, although their deoxidizing power is relatively strong. It is mainly used as an alloying agent.