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简述了普碳钢传统脱氧机理,分析对比了铝铁和硅钙钡脱氧的成本。针对铝铁脱氧形成夹杂物多,硅钙钡脱氧不良,浇铸过程浸入式水口侵蚀严重等问题,提出了增碳剂加硅铁脱氧工艺,降低脱氧成本,改善钢水质量。终点碳质量分数为0.04%~0.05%时,成本降低3.68元/t;终点碳质量分数为0.06%~0.10%时,成本降低3.33元/t。同时,针对新工艺带来的回磷和钢水可浇性问题,提出了有效的解决方案。
The general deoxidation mechanism of plain carbon steel is briefly introduced, and the cost of deoxidation of aluminum, barium and calcium silicate is compared and analyzed. Aiming at the problems of many inclusions formed during the deoxidation of aluminum and iron, the bad deoxidation of barium calcium silicate and the serious erosion of the submerged entry nozzle in the casting process, the recarburiser and the ferrosilicon deoxidation process are proposed to reduce the deoxidation cost and improve the quality of the molten steel. The cost decreases by 3.68 yuan / t when the end-point carbon mass fraction is 0.04% ~ 0.05%, and 3.33 yuan / t when the end-point carbon mass fraction is 0.06% ~ 0.10%. In the meantime, an effective solution is put forward in view of the problems of phosphorus replenishment and molten steel pourability brought by the new process.