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7号高炉自1977年投产至1992年4月完善性大修停炉的15年来,由于各种原因使生产一直处于不稳定状态,各项经济技术指标不好,高炉寿命很短。在此次大修中应用了陶瓷杯炉缸、烧结机尾过筛、沟下风力过筛、炉顶中心加焦等技术;并进行了炉型优化设计,引用双炉身角、深死铁层、矮炉喉,炉身采用第三代冷却壁和炉衬测厚技术;选用较小的风口面积,合理地加重边缘,维持较高的风压和压差,灵活地调剂批重,制定了合理的基本制度,加之强化管理,精心操作,使该炉开炉后的1992年6～10月份各项经济技术指标均达到历史最好水平。
During its 15th year of operation since its completion in 1977, the No. 7 blast furnace has been undergoing major overhauls and shutdowns in April 1992, the production has been in an unstable state for various reasons. All economic and technical indicators are not good and the blast furnace life is short. In this overhaul, the ceramic hearth furnace, the sinter tail sifting, the wind under the ditch sieve, the center of the top of the furnace and other technologies are also applied. The optimal design of the furnace design is adopted. , Low boiler throat, the third generation of the furnace wall and furnace lining thickness measurement technology; choose a smaller outlet area, a reasonable increase in the edge, to maintain high wind pressure and pressure, flexibility to adjust the batch weight, developed a reasonable The basic system, coupled with strengthening management, meticulous operation, so that the furnace after the furnace in 1992 6 ~ October various economic and technical indicators have reached the highest level in history.