Effect of MgO on the Softening-melting Process of BF Burden
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摘要: 以高炉炉料结构为基础,采用高温模拟方法,研究了混合炉料中不同MgO含量对炉料软熔性能的影响规律。结果表明,随着混合炉料中MgO含量的增加,开始软化温度和软化结束温度均升高,软化温度区间变宽;MgO含量越高软化结束温度与压差陡升温度的差距越大;压差陡升温度、滴落温度和熔化温度区间均随着混合炉料中MgO含量的升高呈升高的趋势,导致熔化带的厚度增加;软熔带的最大压差和综合透气性指数均随着混合炉料中MgO含量的增加而增加,不利于高炉的稳定顺行。Abstract: The influences of different MgO contents in the mixed burden on the softening-melting properties of burden by high temperature simulation experiment were studied.The results indicate that with the increase of MgO content in the mixed burden,T10% and T40% increase,and the softening temperature range widens.The higher the MgO content,the greater the difference between T40% and Ts.Besides,Ts,Td and ΔTds all increase with the increase of MgO content in the mixed burden,which leads to the increase of the thickness of the melting zone.Finally,the ΔPmax and S of the softening-melting zone increase with the increase of MgO content in the mixed burden,which is not conducive to the stability of the blast furnace.
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Key words:
- blast furnace /
- MgO /
- softening-melting property /
- air permeability /
- primary slag
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