Ferroalloy production methods: extrajudicial furnace. Rely on chemical reactions generated by thermal reduction heating alloy and slag, Jilin silicon barium, calcium, and the reduction reaction automatically, without external supply of heat. Furnace extrajudicial simple equipment, Hebei silicon barium, calcium, can produce very low carbon content of products. However, due to fast response time is short, silicon barium calcium alloy impurities can not be adjusted in the smelting process. Therefore, strict quality requirements of the charge, containing fewer impurities, and to dried, crushed to a certain size. Ferroalloy production methods: extrajudicial furnace. Smelting, Jiangsu silicon barium calcium, with a good charge into the inner cylindrical refractory masonry oven bottom with magnesia (thermite method) or quartz sand (silicon thermal method) or set up activities in the hearth. By refining when feeding different ignition method can be divided into the upper and lower ignition method.