宝钢RH精炼炉用耐火材料无铬化的实现

Realization of chrome-free refractories for RH degasser

介绍了宝钢RH炉内衬耐火材料无铬化工作及取得的成果,重点涉及下部槽、环流管和浸渍管部位无铬材料的开发应用过程。近年来,在RH槽体内壁上不断尝试了烧成镁尖晶石锆、刚玉-尖晶石和不烧镁尖晶石等材料,最终实现了以不烧镁尖晶石砖为主体,结合部分刚玉-尖晶石浇注料整体浇注浸渍管的方案,实现了对RH浸渍管、环流管、下部槽和中上部槽等部位整槽镁铬质耐火材料的替代。工业应用试验表明,RH精炼炉的寿命业绩和成本消耗均获得进步,至2012年底,宝钢炼钢厂全面实现了RH精炼炉用无铬耐火材料的工业化应用。

The work and achievement on chrome-free lining for RH degasser of Baosteel were introduced, mainly involving ihe development and application of chrome＇free materials for lower vessels, circulation pipes and snorkels. In recent years,Baosteel tried to use magnesia-spinel-zirconia,corundum-spinel and unfired magnesia-spinel materials, etc. for RH vessel lining, finally adopted unburned magnesia-spinel brick as main body, combining some integrally casting corundum snorkels, to substitute the magnesia- chrome refractories on RH snorkel,circulation pipe, lower vessel, medium and upper vessel, etc. Industrial application results showed that the RH refining furnace life was extended,the cost consumption was de- creased. By the end of 2012, Baosteel Steel-making Plant comprehensively implemented industrial applica- tion of chrome-free refractories for RH degasser.