Abstract: In order to improve the service life of the immersion tubes used in the RH furnace,the existing problems of the immersion tubes during operation such as the falling off of casting material,the burning damage of steel lining,the explosion of welds and brick body,and the low efficiency of thermal maintenance,etc.) were analyzed.Through the implementation of comprehensive measures such as the optimization of process parameters,the improvement of the structure of immersion tubes,and the adjustment of thermal maintenance,the average service life of impregnated tubes has been significantly increased from 105 to 118 furnace times,and the failure rate has been reduced by 15%.The consumption of refractory spraying materials per ton of steel has been reduced by 0.05 kg,and the problems of casting falling off and weld cracking have been effectively solved.The cost of smelting production and consume of refractory material have been significantly reduced ,and reliable technical support have been provided for stable production of high-value-added silicon steel and electrical steel by the implementation of comprehensive measures in the workshop.

Key words: RH furnace, immersion tube, ladle refining, hot maintenance

摘要： 为提升RH炉用浸渍管的使用寿命,对浸渍管在操作过程中存在的问题(如浇注料脱落、钢胆烧损、焊缝与砖体炸裂、热维护效率低等)进行了分析。通过实施工艺参数的优化调整、浸渍管结构的改良以及热维护策略的调整等综合措施,成功实现了浸渍管平均使用寿命的显著提升,从105炉次增加至118炉次,同时将故障率降低了15%,吨钢耐火喷涂料消耗量减少0.05 kg,并有效解决了浇注料脱落、焊缝炸裂等问题,显著降低了冶炼生产成本与耐火材料消耗,为车间稳定生产高附加值硅钢、电工钢提供了可靠技术支撑。

关键词: RH炉, 浸渍管, 炉外精炼, 热维护