避免原辅料对KB-150t BOF-RH-CC流程MA超低碳钢水增碳的生产实践
2015
MA超低碳钢(/%:≤0.005C,0.007-0.012Si,0.07-0.15Mn,≤0.025P,≤0.025S,≤0.035Als,≤0.002 0N)的生产流程为KB-150 t BOF(终点[C]≤0.020%)-RH-200 mm板CC工艺。试验分析了结晶器保护渣,中间包覆盖剂,钢包耐火材料对钢液增碳量影响。结果表明,结晶器增碳量(△C 0.0003%-0.0008%)明显高于中间包增碳量(△C 0.000 1%-0.0005%),通过稳定冶金操作,控制保护渣原始碳量为1%-2%,向保护渣中添加MnO_2(3.5%-4.0%),控制覆盖剂量等工艺措施,可有效地减少钢液增碳。
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