摘要:
利用热力学软件(HSC Chemistry 6.0)研究氯元素在高炉内可能存在的化学反应,分析氯元素在高炉内不同温度区间发生的主要化学反应,得到无碱金属、少量碱金属和大量碱金属存在三种冶炼条件下高炉内氯元素的反应行为。结果表明,在无碱金属存在时,由原燃料带入高炉内的氯多生成HCl气体;在含少量碱金属时,氯以HCl气体和碱金属氯化物的形式存在;在高炉内碱金属含量较高时,氯主要以碱金属氯化物形式存在。上述含氯产物随高炉煤气上升,部分吸附在含铁炉料和焦炭上并随之下降,部分随高炉煤气排出,少量氯元素被炉渣吸收,从而影响高炉冶炼过程。。
关键词:
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高炉 /
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氯元素 /
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热力学分析 /
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反应行为 /
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碱金属
Abstract:
The potential chemical reactions of chlorine element in blast furnace were investigated by using the thermodynamic software(HSC Chemistry 6.0). The major chemical reactions at different range of temperature were analyzed,and the reaction behaviors were obtained under the three kinds of smelting conditions,ie,without the presence of alkali,with small amount and large amount of alkali,respectively.The results show that without presence of alkali the chlorine brought in by raw materials and fuels mostly generates HCl gas. When the alkali amount is small,chlorine is present in the form of HCl gas and alkali-chlorine. while chlorine mainly exists in the form of alkali-chloride if a large amount of alkali is present in blast furnace.. The obtained chlorine products rise along with the blast furnace gas. Some of chlorine product is absorbed in iron burden and coke and then fall down,some is discharged with blast furnace gas. In addition,small amount of chlorine element is absorbed by blast furnace slag. It is imperative that the chlorine products of blast furnace affect the smelting process of blast furnace.
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