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Research of Comprehensive Regulation Technology for Hearth Protective Layer of Blast Furnace Longevity

机译：高炉长寿炉膛保护层综合调节技术研究

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A stable protective layer formed on the hot face of the blast furnace hearth wall is capable of effectively protecting the lining from hot metal erosion as well as chemical attack to maximize the life span of the blast furnace hearth. In this paper, the mineralogical analysis as well as microstmcture observations of the protective layer samples was conducted. It was found that, from the perspective of the formation mechanism, the protective skull can be divided into four sub-layers which were iron-rich layer, slag-rich layer, graphite-rich layer, and titanium-rich layer, In addition, those sub-layers varied in their abilities to form the protective layer. The titanium-rich layer had the strongest tendency to form the protective layer followed by graphite-rich layer and iron-rich layer. It is noteworthy that the key to intentionally promote the formation of the protective layer lies in the control of the hot face temperature and hot metal composition. Finally, this paper suggested that the aspects such as blast furnace design philosophies, the control of hot metal quality, and operational parameters should be given special attention to ensure the formation of an effective protective layer.
机译：在高炉炉炉壁的热面上形成的稳定保护层能够有效地保护衬里从热金属腐蚀以及化学攻击，以最大化高炉炉膛的寿命。本文进行了矿物学分析以及保护层样品的微观度观察。发现，从地层机制的角度来看，保护颅骨可以分为四个亚层，其是富含铁层，富含渣层，石墨层和富含钛的层，此外，这些子层的能力变化以形成保护层。富含钛层具有最强的趋势，形成保护层，然后形成富石墨层和富含铁层。值得注意的是，故意促进保护层的形成的关键在于控制热面温和热金属组合物。最后，本文建议，高炉设计哲学，热金属质量的控制等方面应特别注意确保形成有效的保护层。

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