摘要
对高炉炉渣全成分(Al_2O_3=8%~25%)的适宜镁铝比进行了理论分析,以构建协同优化-功效最大化的适宜镁铝比理论体系。基于热力学和相图分析,定量给出了适宜镁铝比三段式精细化控制方针:①当炉渣Al_2O_3<14%时,炉渣的镁铝比不受限,可根据原燃料条件和生产成本等条件添加MgO;②当炉渣Al_2O_3=15%~17%时,炉渣适宜的镁铝比为0.40~0.50,但需注意炉渣对温度的敏感性;③当炉渣Al_2O_3>18%时,炉渣适宜的镁铝比为0.45~0.55。
Theoretical analysis is carried out on suitable MgO/Al_2 O_3 ratio with respect to entire composition of BF slag(Al_2 O_3 =8% ~25%) with aim of setting a theoretical system of suitable MgO/Al_2 O_3 ratio for synergistic optimization-efficiency maximization. Based on thermodynamics and phase diagram analysis, a quantitative three-stage delicacy control guideline for suitable Mg0/Al_2 O_3 ratio is proposed:(1) in BF slag, if Al_2 O_3<14%, the MgO/Al_2 O_3 ratio can be any one;(2) if Al_2 O_3 = 15%~17%, the MgO/Al_2 O_3 ratio should be 0.40 ~0.50, but attention should be paid to the temperature sensitivity of slag;(3) if Al_2 O_3>18%, the suitable MgO/Al_2 O_3 ratio is 0.45 ~0.55.
引文
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