摘要:
针对目前高炉炼铁原料条件日益恶化,冶炼强度不断加大,铜冷却壁热面渣皮出现稳定性下降、频繁脱落的现象,以及包钢高炉渣成分的特殊性,采用试验研究与相图分析的方法,对包钢高炉初渣及中间渣的软熔性质进行研究。结果表明,w(FeO)为15%时,弱酸性的包钢高炉渣的稳定性较差,且碱度对高炉初渣及中间渣的稳定性影响比渣中w(FeO)的变化更为显著;相比于w(FeO)对高炉渣软熔性质的影响,K2O的作用更强:碱度为1,w(FeO)为15%时,高炉渣中w(K2O)每增加0.5%,其软熔温度降低20℃左右,而CaF2含量由1.47%增加到2.67%,对高炉渣软熔性质的影响并不明显。
关键词:
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高炉 /
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初渣 /
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中间渣 /
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软熔性质
Abstract:
Considering this fact that the slag skull on copper cooling stave is unstability and scales off frequently due to the worsen material condition and the increased combustion intensity of blast furnace (BF) ironmaking,the softening melting properties of BF primary slag and medium-term slag of had been studied based on the particularity of the compsitions of BF slag of Baotou Steel and Iron Company,and the work was implemented by means of test and phase diagram analysis.The results show that the weakly acidic BF slag is most unstable while w(FeO) is 15%.Meanwhile the influence of basicity on the stability of BF slag is more significant than that of FeO,and K2O is also more remarkable than FeO.Furthermore,the softening melting temperature will derease by 20℃ while w(K2O) increases per 0.5%,but the content of calcium fluoride increasing from 1.47% to 2.67% can not strongly affect the softening melting properties of BF slag.
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