Ferroalloy industry has experienced three periods: the blast furnace and electric large-scale development period. 1908--1960 years, the blast furnace in the rapid development and buy manganese alloys, but the development of faster and manganese alloy furnace, its production gradually catch up with the production of blast furnace products. Beginning of the 20th century, with the rapid development of the world steel industry, requires not only a strong alloy oxygen capacity, and in order to carry out multi-element alloy, it should also have desulfurization, dephosphorization ability off impurities. Ferroalloy industry has experienced three periods: the ferroalloy industry modernization period. So far in 1960, gradually replacing the blast furnace and dominant. After 1960, production surpassed the blast furnace ferroalloy ferroalloy production, and continue its rapid development. 1995 world steel production of about 340 million t of silico-manganese alloy prices, ferroalloy production of about 16 million tons, of which electric ferroalloy production reached more than 80%. Meanwhile electric equipment technology accelerates large-scale, fully enclosed of (semi-closed), mechanization and process control the pace of modernization, electric furnace gas cleaning and heat recovery to reach the practical stage, there has been pollution-free ferroalloy plant; computer controlled production process application and promotion.