碳脱氧在钢包顶渣改质中的应用

 为了进一步降低夹杂物缺陷并提高产品质量,基于碳脱氧进行了钢包顶渣改质的研究。冷轧产品的生产工艺为铁水预处理→转炉→RH精炼→连铸,为减少钢中夹杂物质量分数,需要进行钢包顶渣改质,同时降低钢包顶渣TFe质量分数。采用粒碳部分替代铝渣球的方法进行基于碳脱氧工艺的钢包顶渣改质,试验结果表明,顶渣改质效果良好,在顶渣TFe质量分数、中间包钢水游离氧明显降低的同时铸坯中Al₂O₃夹杂物得到优化;“30 kg粒渣+铝渣球”工艺降低生产成本5.16元/t(钢)。

Application of carbon deoxidation in ladle top slag modification

In order to further reduce inclusion defects and improve product quality, the modification of ladle top slag based on carbon deoxidation was studied.The production process of cold-rolled products is,hot-metal pre-treatment→BOF converter →RH refining →continuous casting. In order to reduce the content of inclusions in steel, the ladle slag should be modified to reduce its mass percent of TFe. Top slag modification process based on carbon deoxygenation was applied, in which carbon particle was used modify the steel bag top slag, partially replace the aluminum slag ball. Good results were got, the mass percent of TFe in the ladle slag and the mass percent of O] in the tundish steel were reduced,meanwhile the Al₂O₃ inclusions in the billet was also optimized. Cost savings about 5.16 yuan/t(steel),in the "30 kg carbon particle + aluminum slag ball" modification process, was got.