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一、前言 不锈钢冶炼最困难的任务是要使高铬钢液迅速降炭,这个过程的主要矛盾是降炭与保铬的矛盾。在大跃进的推动下,我国在六十年代初期试验成功了用返回吹氧法冶炼不锈钢的工艺,朝着解决降炭保铬的方向迈出了一大步,但是这个矛盾并未完全解决。例如,上海钢研所电炉冶炼18-8型不锈钢时,铬的返回比只有50％左右,其余一半的铬要用微炭铬铁来补加,成本较高,并且总铬回收率也只能达到88～90％左右。而吹氧结束时温度达1900℃左右,严重侵蚀炉衬,故在
First, the foreword The most difficult task of stainless steel smelting is to rapidly reduce the carbon content of high chromium steel, the main contradiction in this process is to reduce the contradiction between carbon and chrome. Under the impetus of the Great Leap Forward, China successfully tested the process of smelting stainless steel by back-blowing oxygen in the early 1960’s and took a big step toward resolving the problem of carbon reduction and chrome preservation. However, this contradiction has not been completely solved. For example, the Shanghai Iron and Steel Institute of Furnace smelting 18-8 stainless steel, chromium return ratio of only about 50%, the remaining half of the chromium to be added with micro-carbon ferrochrome, higher cost, and the total chromium recovery rate Reaching about 88 ~ 90%. The temperature at the end of the oxygen blowing up to 1900 ℃, a serious erosion lining, so in