低镍铁水冶炼1Cr14Mn10NiCuN不锈钢生产工艺优化  

Optimization of production process for smelting 1Cr14Mn10NiCuN stainless steel with low nickel hot metal

作　　者：史彩霞[1] 游香米[1] SHI Cai-xia;YOU Xiang-mi(Steelmaking Department,CISDI Engineering Co.,Ltd.,Chongqing 401122,China)

机构地区：[1]中冶赛迪工程技术股份有限公司炼钢事业部,重庆401122

出　　处：《中国冶金》2022年第12期78-82,共5页China Metallurgy

摘　　要：通过对1Cr14Mn10NiCuN不锈钢冶炼的几种原料条件和工艺路径对比分析,发现采用低镍高炉铁水为主要原料的工艺流程因铁水成分、温度和洁净度更优而更具竞争力。某厂采用高硅含铬低镍铁水冶炼1Cr14Mn10NiCuN不锈钢,铁水带入铬可节约50铬铁用量约66.7 kg/t(钢),降低成本约400.5元/t(钢),但预处理环节铬的收得率仅为88%,铬损失量折算成50铬铁达到9.1 kg/t(钢),折合人民币约54.6元/t(钢)。工艺优化方案考虑在铁水预处理炉吹氧结束时加入合金熔化炉熔化的铬铁水,利用铬铁水中的硅还原渣中的铬。工艺方案优化后在预处理炉环节将低镍铁水中的铬收得率提高至95%,使生产全流程50铬铁加入量减少约5.3 kg/t(钢),降低成本约31.9元/t(钢)。By comparative analysis of several raw material conditions and process paths of 1 Cr14 Mn10 NiCuN stainless steel, it is found that the process using low nickel hot metal as the main raw material is more competitive for the better composition, temperature and purity of molten iron. 1 Cr14 Mn10 NiCuN stainless steel was smelted with high silicon low nickel chromium-containing hot metal in a plant. The chromium brought in hot metal could save FeCr50 consumption about 66.7 kg/t of steel, and the cost could be reduced about 400.5 yuan/t of steel. However, the recovery rate of chromium in the pretreatment furnace process was only 88%, and the chromium loss which converted into FeCr50 reached 9.1 kg/t of steel, which was equivalent to 54.6 yuan/t of steel. In the process of optimization scheme, it was considered to add the molten FeCr50 melted by alloy melting furnace after the oxygen blowing in the hot metal pretreatment furnace, and to use the silicon in the FeCr50 to reduce the chromium in the slag. After the optimization of process scheme, the chromium recovery rate in the hot metal of low nickel hot metal in pretreatment furnace will be increased to 95%, so that about 5.3 kg/t of steel of FeCr50 addition can be saved in the whole production process, and the cost can be reduced by 31.9 yuan/t of steel.

关 键 词：1Cr14Mn10NiCuN不锈钢 高硅含铬低镍铁水 预处理炉 GOR炉 50铬铁 

分 类 号：TF764.1[冶金工程—钢铁冶金]