Ferroalloy production methods: heating method is the production of ferro-alloys (high-carbon alloy), the main method; silicon thermal power is reduced ore in an electric furnace, silicon oxide or slag Wanted (such as ferrosilicon or silico-manganese intermediate products or SILICOCHROMIUM) calcium aluminosilicate particles, and to make lime flux production of ferroalloys. Therefore, the carbon content of the product obtained is low; for the production of high melting point, low carbon alloy or pure calcium aluminosilicate particles of metal manufacturers, metal thermal method should be used calcium aluminosilicate particles, metal heat method is generating a reduction reaction The chemical heat to heat the alloy and slag, and the reaction automatically. Ferroalloy industry has experienced three periods: the blast furnace and electric large-scale development period. 1908--1960 years, calcium aluminosilicate particles plant, blast furnace and electric furnace in rapid development, but the development of electric faster, its production gradually catch up with 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.