Furnace bottom blowing: by placing the bottom of the nozzle N2, Ar, CO2, CO, CH4, O2 and other gases blown into the furnace according to the technical requirements of the bath in order to achieve accelerated melting, Shandong Industrial deoxidizer, furthering the aims of the metallurgical reaction process . The use of bottom blowing smelting technology can shorten the time, industry deoxidizer, reduce power consumption, improve dephosphorization, desulfurization operation, improve the residual amount of manganese steel, metals and alloys improve yield. And make steel composition, temperature more uniform, thereby improving the quality of steel, Wuhan deoxidizer, reduce costs and improve productivity. Composite deoxygenation: Ferroalloys containing two or more elements deoxidation deoxidation of liquid steel conducted. Advantages: 1) to improve oxygen capacity deoxidizing element; 2) favor the formation of liquid oxidation products can be easily separated and floating; 3) help to improve the solubility of volatile elements, Hebei deoxidizer, reduce the loss of elements to improve deoxidation deoxidation elements efficiency. Essence of the compound deoxidation: simultaneously react with oxygen dissolved in molten steel with two or more deoxidizing element, the deoxidation products and make them together to form a miscible body to reduce the activity or compound deoxidation products.