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炉外精炼技术自本世纪50年代问世以后,伴随着钢铁工业的发展,取得了长足的进步.尤其在特殊钢领域,日本、美国及西欧国家采用炉外精炼工艺生产的不锈钢产量已占总量的90％以上,一些工业发达国家采用炉外精炼生产的钢产量也已占总量的50％。炉外精炼的目的不外乎两个:一是提高钢水的质量,去除钢水中的气体和夹杂物,添加必要的合金,调整温度及成分均匀化;二是提高初熔炉的生产率,把在初熔炉中处于低负荷运行状态的操作移到初熔炉外进行。
After the advent of furnace refining technology since the advent of the 1950s, great progress has been made with the development of the steel industry, particularly in the special steel sector where stainless steel output from furnace refining has been used in Japan, the United States and Western European countries More than 90%, some developed countries use the furnace output of steel production also accounted for 50% of the total. The purpose of refining outside the furnace is nothing more than two: First, improve the quality of molten steel to remove the gas and inclusions in the molten steel, add the necessary alloys, adjust the temperature and composition of the second is to improve the productivity of the first furnace, The operation of the furnace in a state of low load operation is shifted to the outside of the primary melting furnace.