The main method of ferroalloy production: vacuum resistance furnace. Production of low carbon micro-carbon ferrochrome, high vacuum resistance furnace when industrial silicon metal silicon nitride ferrochrome, ferromanganese and other products, the main equipment for the vacuum resistance furnace. A vacuum decarburization furnace law in the solid state under vacuum conditions, the press-forming block when the material was charged into the smelting furnace industrial silicon silicon metal prices, relying on the current through the heating resistor when the hot electrode, while vacuum pumping, production It is carried out intermittently. The main method of ferroalloy production: classification by heat source. Heating method. Heat electrothermal smelting process is mainly electricity, carbonaceous reducing agent oxide ore using a continuous operating process and in reducing electric furnace. Silicon thermal power. Heat silicon thermal power smelting process is mainly electricity, heat the remaining time for the release of silicon oxide, silicon (ferrosilicon, silicon manganese alloys and intermediate products of silicon-chromium alloy) as a reducing agent in the oxide ore. Production is carried out intermittent operations in the refining electric furnace.