Optimization of Dephosphorization Rate of Converter Final Slag by Gasification Dephosphorization
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摘要: 利用溅渣护炉动力学条件,向终渣中加入焦粉可使终渣中P元素以气态形式脱除,处理后熔渣可循环利用。为进一步提升气化脱磷率进行了优化工业试验,试验表明:焦粉最佳加入量为1.1倍碳当量,其气化脱磷率为42.3%;将溅渣护炉时的底吹流量控制在350 m3/h气化脱磷率最大,为37.9%;焦粉粒度6~8 mm时气化脱磷率为34%,焦粉粒度细化至4~6 mm时气化脱磷率变化不大;若溅渣前加入1/2焦粉,溅渣开始10 s内加入其余部分,气化脱磷率可提高至37%。Abstract: The coke powder can be used to remove the P element in the final slag in the form of gaseous form,and the slag can be recycled after treatment.In order to further improve the gasification dephosphorization rate,the optimum industrial experiment was carried out.The results showed that the optimum amount of coke powder was 1.1 times of carbon equivalent,and resulting gasification dephosphorization rate was 42.3%.The gasification dephosphorization rate was as high as 37.9% when the bottom blown flow rate of the slag splashing furnace was controlled at 350 m~3/h.The gasification dephosphorization rate was 34% when the coke powder was 6~8 mm.Further refine of coke powder to 4~6 mm had litter effect on gasification dephosphorization rate.Adding 1/2 of coke powder before slag splash and the rest in 10 s after slag splash,the gasification dephosphorization rate can be increased to 37%.
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Key words:
- steelmaking /
- converter /
- slag splashing /
- gasification dephosphorization /
- bottom blowing
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