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以高炉生产中实际渣样为基础,检测不同炉渣成分对炉渣黏度和熔化性温度的影响,对降低炉渣中MgO含量的可行性进行研究。实验结果表明,当wAl2O3为15%,在炉况稳定,炉缸温度充沛的情况下,二元碱度较高(1.2左右),可将wMgO下降到4%~6%;二元碱度较低(1.1左右),可将wMgO下降到5%~6%,保证炉渣适宜的流动性,不影响高炉正常运行。同时结合CaO-SiO2-MgO-Al2O3相图和等黏度图分析,当炉渣中wMgO为5%,从1 500℃降为1 400℃时所对应的黏度值上升最快,这与实验数据相一致。
Based on the actual slag samples in the blast furnace production, the effects of different slag compositions on the viscosity and melting temperature of the slag were investigated, and the feasibility of reducing the MgO content in the slag was studied. The experimental results show that the wMgO can be reduced to 4% ~ 6% when the wAl2O3 is 15%, and the stability of the furnace condition and the temperature of the hearth are abundant, the binary basicity is higher (about 1.2) Low (about 1.1), wMgO can be reduced to 5% to 6%, to ensure the appropriate flow of slag, does not affect the normal operation of the blast furnace. According to the analysis of CaO-SiO2-MgO-Al2O3 phase diagram and iso-viscosity diagram, when the content of wMgO in slag is 5%, the viscosity value increases from 1 500 ℃ to 1 400 ℃, which is consistent with the experimental data .