Hot Metal Desiliconization with Zn-Bearing Dusts
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摘要: 為在鋼廠內循環利用含鋅粉塵,在實驗室進行了含鋅粉塵用于鐵水預脫硅的研究,分析了鐵水脫硅及渣中Zn揮發的影響因素.結果表明:1500℃下將轉爐和電爐含鋅粉塵按1:1混合對鐵水進行預脫硅,脫硅效果比燒結粉塵更好,脫硅產生的泡沫渣高度更低,脫硅渣中Zn的揮發率可達99%;提高鐵水溫度、增加鐵水攪拌強度都有利于脫硅;隨鐵水初始Si含量升高,粉塵脫硅率增加.Abstract: In order to recycle Zn-bearing dusts in Baosteel, hot metal desiliconization with the dust was investigated in laboratory. The factors which affect desiliconization and Zn evaporation were discussed. Theresults show that the mixture of EAF dust and BOF dust containing Zn for hot metal desiliconization at 1500℃is better than sinter dust. The Zn evaporation rate in the slag can reach to 99 % and the height of foaming slag in desiliconization is lower. It benefits desiliconization by increasing temperature, enhancing stirring intensity or increasing the initial content of [Si].
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Key words:
- Zn-bearing dust /
- recycling /
- hot metal desiliconization
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