转炉终渣气化脱磷优化试验研究
|
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 m~3/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%。
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%.
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%.
引文
[1] Ouyang Fengrui.Study on management system of urban solid waste recycling in China[D].Harbin:Harbin Institute of Technology,2007.(欧阳丰瑞.我国城市固体废弃物资源化管理体系研究[D].哈尔滨:哈尔滨工业大学,2007.)
[2] Cao Jianhong.Analysis of converter slag property improvement and its application in Xiangtan Steel[J].Metal Materials and Metallurgical Engineering,2017,45(1):50-54,60.(曹建红.湘钢转炉渣理化性质及改善应用分析[J].金属材料与冶金工程,2017,45(1):50-54,60.)
[3] Sha Jun,Zhu Miaoyong,Wan Licheng,et al.Study on physical properties of slag used for slag splashing in BOF[J].Steelmaking,2001(4):36-39.(沙骏,朱苗勇,万利成,等.转炉溅渣护炉炉渣物性研究[J].炼钢,2001(4):36-39.)
[4] Guo Hui.Study on the reconstruction of steel slag and its composition and performance[D].Guangzhou:South China University of Technology,2010.(郭辉.钢渣重构及其组成、性能的基础研究[D].广州:华南理工大学,2010.)
[5] Jiang Yuanhai,Zhou Suping.New technology of steel slag activation and its application in cement production[J].Iron Steel Vanadium Titanium,1994,15(2):40-43.(蒋元海,邹苏萍.钢渣活化新技术及其在水泥生产中的应用[J].钢铁钒钛,1994,15(2):40-43.)
[6] Zhang Yuzhu,Lei Yunbo.Influence of cooling intension on microstructure and content of f-CaO in steel slag[J].Iron Steel Vanadium Titanium,2011,32(2):20-24.(张玉柱,雷云波.冷却方式对钢渣中f-CaO显微形貌及含量的影响[J].钢铁钒钛,2011,32(2):20-24.)
[7] Dippenear R.The use and re-use of iron and steelmaking slags[J].Ironmaking and steelmaking,2005,32(1):35-46.(迪佩尼尔.钢和钢渣的利用及循环利用[J].炼钢与炼铁,,2005,32(1):35-46.)
[8] Wang Yici,Li Haiyang et al.Thermodynamic analysis and experiment on gasification dephosphorization reaction of converter Slag[J].Journal of Iron and Steel Research,2016,28(6):31～34.(王艺慈,李海洋等.转炉钢渣气化脱磷反应的热力学分析及试验[J].钢铁研究学报,2016,28(6):31～34.)
[9] Ai Liqun,Zhang Yanlong,Zhu Yiheng.Research on carbothermic reduction for dephosphorization from converter slag by microwave heating[J].Iron Steel Vanadium Titanium,2015,36(6):63-67.(艾立群,张彦龙,朱祎姮.微波碳热还原转炉钢渣脱磷研究[J].钢铁钒钛,2015,36(6):63-67.)
[10] Wang Shuhuan.Thermodynamic analysis of gasification and dephosphorization of slag in silicon reduction converter[J].Steelmaking,2008,24(1):31-34.(王书桓.硅还原转炉熔渣气化脱磷热力学分析[J].炼钢,2008,24(1):31-34.)
[11] Li Guangqiang,Zhang Feng,Zhang Li,et al.Study on the re-conversion of converter slag by high temperature carburizing[J].Journal of Materials and Metallurgy,2003,2(3):167-172.(李光强,张峰,张力,等.高温碳热还原进行转炉渣资源化的研究[J].材料与冶金学报,2003,2(3):167-172.)
[2] Cao Jianhong.Analysis of converter slag property improvement and its application in Xiangtan Steel[J].Metal Materials and Metallurgical Engineering,2017,45(1):50-54,60.(曹建红.湘钢转炉渣理化性质及改善应用分析[J].金属材料与冶金工程,2017,45(1):50-54,60.)
[3] Sha Jun,Zhu Miaoyong,Wan Licheng,et al.Study on physical properties of slag used for slag splashing in BOF[J].Steelmaking,2001(4):36-39.(沙骏,朱苗勇,万利成,等.转炉溅渣护炉炉渣物性研究[J].炼钢,2001(4):36-39.)
[4] Guo Hui.Study on the reconstruction of steel slag and its composition and performance[D].Guangzhou:South China University of Technology,2010.(郭辉.钢渣重构及其组成、性能的基础研究[D].广州:华南理工大学,2010.)
[5] Jiang Yuanhai,Zhou Suping.New technology of steel slag activation and its application in cement production[J].Iron Steel Vanadium Titanium,1994,15(2):40-43.(蒋元海,邹苏萍.钢渣活化新技术及其在水泥生产中的应用[J].钢铁钒钛,1994,15(2):40-43.)
[6] Zhang Yuzhu,Lei Yunbo.Influence of cooling intension on microstructure and content of f-CaO in steel slag[J].Iron Steel Vanadium Titanium,2011,32(2):20-24.(张玉柱,雷云波.冷却方式对钢渣中f-CaO显微形貌及含量的影响[J].钢铁钒钛,2011,32(2):20-24.)
[7] Dippenear R.The use and re-use of iron and steelmaking slags[J].Ironmaking and steelmaking,2005,32(1):35-46.(迪佩尼尔.钢和钢渣的利用及循环利用[J].炼钢与炼铁,,2005,32(1):35-46.)
[8] Wang Yici,Li Haiyang et al.Thermodynamic analysis and experiment on gasification dephosphorization reaction of converter Slag[J].Journal of Iron and Steel Research,2016,28(6):31～34.(王艺慈,李海洋等.转炉钢渣气化脱磷反应的热力学分析及试验[J].钢铁研究学报,2016,28(6):31～34.)
[9] Ai Liqun,Zhang Yanlong,Zhu Yiheng.Research on carbothermic reduction for dephosphorization from converter slag by microwave heating[J].Iron Steel Vanadium Titanium,2015,36(6):63-67.(艾立群,张彦龙,朱祎姮.微波碳热还原转炉钢渣脱磷研究[J].钢铁钒钛,2015,36(6):63-67.)
[10] Wang Shuhuan.Thermodynamic analysis of gasification and dephosphorization of slag in silicon reduction converter[J].Steelmaking,2008,24(1):31-34.(王书桓.硅还原转炉熔渣气化脱磷热力学分析[J].炼钢,2008,24(1):31-34.)
[11] Li Guangqiang,Zhang Feng,Zhang Li,et al.Study on the re-conversion of converter slag by high temperature carburizing[J].Journal of Materials and Metallurgy,2003,2(3):167-172.(李光强,张峰,张力,等.高温碳热还原进行转炉渣资源化的研究[J].材料与冶金学报,2003,2(3):167-172.)