Modification of final BOF slag for the effective slag splashing technology

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• 作者：Artyom SerdyukovAnatoly TonkushinOleksiy SmirnovKirill Sharandin
• 会议时间：2013-06-01
• 关键词：converter ; lining ; slag splashing ; modeling ; magnesium-based flux-modifier ; skull layer ; unit costsIntroduction
• 作者单位：Artyom Serdyukov,Anatoly Tonkushin(Ltd " Puyang-Ukraine ",Ukraine)Oleksiy Smirnov,Kirill Sharandin(Donetsk National Technical University,Donetsk,Ukraine)
• 母体文献：第五届宝钢学术年会论文集
• 会议名称：第五届宝钢学术年会
• 会议地点：上海
• 主办单位：中国金属学会
• 语种：chi

摘要

Slag coating on the lining surface exercised by means of nitrogen jets that splash specially treated slag with magnesium additives,has become an efficient technology to extend the lifetime of the converters ' refractory lining.Meanwhile,converter steelmaking practice demonstrates that the chemical composition of the final slag can fluctuate within a reasonably wide range of Fe0,SiO2,CaO,etc.concentration values.This complicates application of universal magnesium-based flux additions and set particular constrains for their efficiency.Slag oversaturation with MgO,is of special importance upon slag treatment for splashing,since Fe oxides are bound into high-melting ferritic phases ( magnesioferrite,magnesiowustite ) displacing low-melting calcium ferrites.While the input of low-soluble particles ( 3 - 5 mm " grains" ) into slag,ensures formation of a " binding backbone" within the skull layer,thus improving its mechanical strength properties and,consequently,its lifetime.Obtained results were employed for the improvement of skull coating process on the converter lining at several metals works of Ukraine.