摘要:
在实验室对炉渣碱度、铁水初始硫含量和温度对铁水含砷的影响进行研究。结果表明,在试验条件下,铁水含砷量随着二元碱度的增大而增高;碱度超过1.16之后生铁中砷含量变化减缓,改变碱度对生铁砷含量影响已不明显;增大炉渣碱度有利于炉渣脱砷,但不宜过大。随着生铁中初始硫含量的增加,铁水中砷含量也随之增加,说明炉渣脱砷率下降。所以,在相同条件下生铁含硫高则含砷也高,在实际生产中应尽量降低[S],控制生铁含硫在一定意义上也就控制了砷含量。在1 400~1 550℃温度范围内,炉渣脱砷率随温度的升高而降低;温度超过1 475℃后,脱砷率降低幅度变得更显著。
关键词:
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铁水 /
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含砷量 /
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初始硫含量 /
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脱砷
Abstract:
The impact of slag basicity,initial sulfur content and temperature of hot metal on the arsenic content in hot metal were studied in this paper.Results show that arsenic content increases with basicity (% CaO)/(% SiO2). When basicity exceeds 1.16 arsenic content changes slowly. Increasing slag basicity at a certain level is in favor of dearsenication. As the initial sulfur content in pig iron increases,arsenic content in hot metal increases,which indicating that slag dearsenication rate decreases. Thus,higher sulfur content in pig iron results into a higher arsenic level in hot metal. In the practical production [S]should be minimized and sulfur content in pig iron should be controlled in order to lower arsenic content. Dearsenication rate decreases with increasing temperature in the range of 1 400 ~ 1 550 ℃.When temperature exceeds 1 475 ℃,the dearsenication rate decrease drastically.
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