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1979年以来,我厂先后有三座高炉因炉底与炉缸钢壳开裂而停炉,作业率下降,生产量减少,一代炉龄缩短30～50％,大修费用增加,这已成为生产技术上的一个关键问题。对两座高炉炉缸和炉底的残砖进行调查时发现,由于碱金属主要是钾浸入炉底,使炉底粘土砖发生相变,体积膨胀,压紧炭捣层,迫使冷却壁外移将钢壳“撑破”。因此,碱金属的危害不止是引起炉身结瘤,并
Since 1979, there are three blast furnaces in our factory which have been shut down due to cracking of hearth and hearth steel shell. The operation rate is reduced and the production volume is reduced. The generation age is shortened by 30 to 50% and the overhauling cost is increased. This has become a technical issue in production technology A key issue. A survey of two blast furnace hearths and hearth residual bricks revealed that due to the alkali metal is mainly potassium immersed in the hearth, the bottom of the clay brick phase change, volume expansion, compaction of carbon pound, forced cooling wall migration The steel “propped broken.” Therefore, the hazards of alkali metal not only cause nodules, and