ABSTRACT

The interface reaction between carbon composite brick and blast furnace slag was investigated to clarify the formation and evolution mechanism of slag-rich protective layer on the brick’s surface in blast furnace. The wettability, microscopic morphology, phase components and thickness of the reaction layer between the original/modified brick and slag with different basicities, MnO, CaF₂ and FeO additions were analyzed respectively. The results revealed that the mechanism of the deposition process of the slag-rich protective layer was relevant to the ash in the brick and coke, and the slag entrained by coke, the wettability between the brick and slag and the oxides such as MnO and FeO in the slag, the precipitated Ti(C,N) from the molten iron, etc.

摘要

研究碳复合砖与高炉矿渣之间的界面反应，阐明高炉砖表面富矿渣保护层的形成和演化机制。分别分析了不同碱度、不同MnO、CaF ₂和FeO添加量的原砖/改性砖与炉渣之间的润湿性、微观形貌、物相成分和反应层厚度。结果表明，富渣保护层沉积过程的机理与砖焦中的灰分、焦炭夹带的炉渣、砖与渣之间的润湿性以及MnO、FeO等氧化物有关。炉渣中、铁水中析出的Ti(C,N)等。