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为找到合理有效的炉渣排氯制度,使得炉渣排氯能力最大化,在对高炉内氯元素进行热力学分析的基础上,研究了高炉渣的化学成分、温度以及恒温时间对排氯能力的影响。结果表明,高炉渣的排氯率随着炉渣碱度的提高而增加;其排氯率随温度的增加而降低;随w(Mg O)的增加,其排氯率先增加后降低;随w(Al2O3)的增加,其排氯率先增加,当渣中w(Al2O3)超过16%时,其对炉渣排氯率的影响不大;随着恒温时间的延长,炉渣的排氯率降低。高炉在保证正常生产的前提下,应适当地提高炉渣碱度,降低高炉渣温度和增加出渣铁次数,w(Mg O)和w(Al2O3)应保持在11.0%和16.0%左右,以提高炉渣的排氯能力,减少氯元素对高炉冶炼和后续设备产生的不利影响。
In order to find a reasonable and effective slag discharge system and maximize the capacity of slag discharge, the effects of chemical composition, temperature and holding time on the chlorine discharge capacity were studied based on the thermodynamic analysis of chlorine in the blast furnace. The results show that the chlorine rejection rate of blast furnace slag increases with the increase of basicity of slag; the chlorine removal rate decreases with the increase of temperature; the chlorine removal rate first increases and then decreases with the increase of w (MgO) Al 2 O 3), the chlorine emission rate firstly increases. When w (Al 2 O 3) in the slag exceeds 16%, it has little effect on the chlorine rejection rate of the slag. With the prolongation of the constant temperature time, the chlorine rejection rate of the slag decreases. Blast furnace to ensure normal production under the premise should be properly raised slag basicity, reduce blast furnace slag temperature and increase the number of iron slag, w (MgO) and w (Al2O3) should be maintained at 11.0% and 16.0%, in order to improve Slag discharge capacity of chlorine to reduce the negative impact of chlorine on the blast furnace smelting and subsequent equipment.