高炉瓦斯泥自还原提取铁和锌的机理研究
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摘要
利用非等温热重分析和马弗炉定温加热试验研究高炉瓦斯泥加热自还原的变化过程,并运用HCS热力学计算软件计算瓦斯泥自还原过程中Fe、Zn氧化物还原的平衡组成及其金属化率,探讨了瓦斯泥加热自还原过程铁和锌氧化物还原规律。结果发现,高炉瓦斯泥自还原过程可分为五个阶段:Ⅰ阶段(22.0~390.1℃),发生C的气化反应和物理吸附;Ⅱ阶段(437.7~758.9℃),发生铁氧化物还原,金属化率不断增大;Ⅲ阶段(758.9~936.1℃),铁、锌氧化物还原共存,铁、锌金属化率仍不断增加;Ⅳ阶段(936.1~1 031.7℃),铁氧化物和锌氧化物还原较充分,铁、锌金属化率最大分别达到70%和99.7%;Ⅴ阶段(1 031.7~1 255.3℃),铁氧化物和锌氧化物反应完全,此过程气态锌可能发生氧化。
The heating self-reduction process of blast furnace( BF) gas slime was studied by non-isothermal thermogravimetric( TG) analysis and isothermal heating in Muffle Furnace. The equilibrium compositions and metallization rate of iron and zinc oxides for BF gas slime in reduction process were calculated by HSC thermodynamic calculation software,and the mechanism for reduction of iron and zinc oxides was also discussed. The results show that the heating self-reduction process of BF gas slime may be divided into five stages: I( 22. 0 ~390. 1 ℃),physical adsorption of carbon gasification reaction; II( 437. 7 ~ 758. 9 ℃),reduction of iron oxide with increase in metallization rate; III( 758. 9 ~ 936. 1 ℃),co-reduction of iron and zinc oxides with increase in metallization rate of iron and zinc; IV( 936. 1 ~ 1 031. 7 ℃),iron and zinc oxides are reduced sufficiently,with maximum 70% and 99. 7% of metallization rate for iron and zinc,respectively; V( 1 031. 7 ~ 1 255. 3℃),iron and zinc oxides are reduced completely,and zinc gas may be oxidized.
The heating self-reduction process of blast furnace( BF) gas slime was studied by non-isothermal thermogravimetric( TG) analysis and isothermal heating in Muffle Furnace. The equilibrium compositions and metallization rate of iron and zinc oxides for BF gas slime in reduction process were calculated by HSC thermodynamic calculation software,and the mechanism for reduction of iron and zinc oxides was also discussed. The results show that the heating self-reduction process of BF gas slime may be divided into five stages: I( 22. 0 ~390. 1 ℃),physical adsorption of carbon gasification reaction; II( 437. 7 ~ 758. 9 ℃),reduction of iron oxide with increase in metallization rate; III( 758. 9 ~ 936. 1 ℃),co-reduction of iron and zinc oxides with increase in metallization rate of iron and zinc; IV( 936. 1 ~ 1 031. 7 ℃),iron and zinc oxides are reduced sufficiently,with maximum 70% and 99. 7% of metallization rate for iron and zinc,respectively; V( 1 031. 7 ~ 1 255. 3℃),iron and zinc oxides are reduced completely,and zinc gas may be oxidized.
引文
[1]Peng Kaiyu,Zhou Yun,Li Liaosha,et al.The present situation and development of comprehensive utilization of zinc-borne dust in steel and iron plants[J].China Resources Comprehensive Utilization,2005,6(6):8-12.(彭开玉,周云,李辽沙,等.冶金含锌尘泥资源化的现状与展望[J].中国资源综合利用,2005,6(6):8-12.)
[2]Liu Bingguo,Peng Jinhui,Zhang Libo,et al.Present condition of research on recycling utilization of blast furnace sludge or flue dust[J].Express Information of Mining Industry,2007,23(5):14-19.(刘秉国,彭金辉,张利波,等.高炉瓦斯泥(灰)资源化循环利用研究现状[J].矿业快报,2007,23(5):14-19.)
[3]Asadi Z,Fathi K.Zinc recovery from blast furnace flue dust[J].Hydrometallurgy,1997,47:113-125.
[4]Wang Dongyan,Chen Weiqin,Zhou Rongzhang,et al.Direct reduction process of pellet containing carbon with addition of Zn-Pbbearing iron and steel plant dust[J].Journal of University of Science and Technology Beijing,1997,4(2):130-133.(王东彦,陈伟庆,周荣章,等.钢铁厂含锌铅粉尘配碳球团的直接还原工艺[J].北京科技大学学报,1997,4(2):130-133.)
[5]Smith W R.HSC chemistry for windows 2.0[J].J.Chem.Inf.Comput.Sci.,1996.36(1):151-152.
[6]Zhou Yong,Li Zhengbang.Thermodynamic analysis on direct alloying of V2O5[J].Iron Steel Vanadium Titanium,2006,27(4):38-42.(周勇,李正邦.V2O5直接合金化的热力学分析[J].钢铁钒钛,2006,27(4):38-42.)
[7]Li Jinlian,Wang Qi,Li Yanru.Kinetics of carbon gasification reaction mechanism and thermal analysis[J].Chemical Engineering&Equipment,2009(12):21-24.(李金莲,汪琦,李艳茹.碳气化反应的机理及热分析动力学研究[J].化学工程与装备,2009(12):21-24.)
[8]Li Jinlian.Study of the reduetion of iron oxide/carbon composites by thermal analysis-mass spectrometry and analysis kinetics[D].Anshan:University of Science and Technology Liaoning,2008.(李金莲.铁氧化物/碳混合物还原的热分析质谱法研究及热分析动力学解析[D].鞍山:辽宁科技大学,2008.)
[9]Liu Guisu,John V S,Lucas A,et al.Thermal investigations of direct iron ore reduction with coal[J].Thermochimica Acta,2004(410):133-140.
[10]Xu Kai,Zhang Yanling,Li Shiqi,et al.Laboratory test and research about extracting iron zinc from blast furnace dust[J].Hebe Metallurgy,2014(3):1-5.(徐凯,张延玲,李士琦,等.唐钢高炉粉尘提取铁、锌的实验室研究[J].河北冶金,2014(3):1-5.)
[11]Liu Yu,Liu Bingguo,Xing Xiaozhong.Research on dezincification of blast furnace flue slime by carbothermal reduction method[J].Inorganic Chemicals Industry,2013,45(10):39-41.(刘瑜,刘秉国,邢晓钟.高炉瓦斯泥碳热还原脱锌研究[J].无机盐工业,2013,45(10):39-41.)
[12]Liu Jianhua,Zhang Jiayun,Zhou Tuping.Influence of foreign oxides on reduction kinetics of iron oxides[J].Journal of Iron and Steel Research,2000,12(4):55-58.(刘建华,张家芸,周土平,氧化物杂质对铁氧化物还原动力学的影响[J].钢铁研究学报,2000,12(4):55-58.)
[13]Nasr M I,Omar A A,Khedr M H.Effect of nickel oxide doping on the kinetics and mechanism of iron oxide reduction[J].Transactions of the Iron&Steel Institute of Japan,1995,35(9):1043-1049.
[2]Liu Bingguo,Peng Jinhui,Zhang Libo,et al.Present condition of research on recycling utilization of blast furnace sludge or flue dust[J].Express Information of Mining Industry,2007,23(5):14-19.(刘秉国,彭金辉,张利波,等.高炉瓦斯泥(灰)资源化循环利用研究现状[J].矿业快报,2007,23(5):14-19.)
[3]Asadi Z,Fathi K.Zinc recovery from blast furnace flue dust[J].Hydrometallurgy,1997,47:113-125.
[4]Wang Dongyan,Chen Weiqin,Zhou Rongzhang,et al.Direct reduction process of pellet containing carbon with addition of Zn-Pbbearing iron and steel plant dust[J].Journal of University of Science and Technology Beijing,1997,4(2):130-133.(王东彦,陈伟庆,周荣章,等.钢铁厂含锌铅粉尘配碳球团的直接还原工艺[J].北京科技大学学报,1997,4(2):130-133.)
[5]Smith W R.HSC chemistry for windows 2.0[J].J.Chem.Inf.Comput.Sci.,1996.36(1):151-152.
[6]Zhou Yong,Li Zhengbang.Thermodynamic analysis on direct alloying of V2O5[J].Iron Steel Vanadium Titanium,2006,27(4):38-42.(周勇,李正邦.V2O5直接合金化的热力学分析[J].钢铁钒钛,2006,27(4):38-42.)
[7]Li Jinlian,Wang Qi,Li Yanru.Kinetics of carbon gasification reaction mechanism and thermal analysis[J].Chemical Engineering&Equipment,2009(12):21-24.(李金莲,汪琦,李艳茹.碳气化反应的机理及热分析动力学研究[J].化学工程与装备,2009(12):21-24.)
[8]Li Jinlian.Study of the reduetion of iron oxide/carbon composites by thermal analysis-mass spectrometry and analysis kinetics[D].Anshan:University of Science and Technology Liaoning,2008.(李金莲.铁氧化物/碳混合物还原的热分析质谱法研究及热分析动力学解析[D].鞍山:辽宁科技大学,2008.)
[9]Liu Guisu,John V S,Lucas A,et al.Thermal investigations of direct iron ore reduction with coal[J].Thermochimica Acta,2004(410):133-140.
[10]Xu Kai,Zhang Yanling,Li Shiqi,et al.Laboratory test and research about extracting iron zinc from blast furnace dust[J].Hebe Metallurgy,2014(3):1-5.(徐凯,张延玲,李士琦,等.唐钢高炉粉尘提取铁、锌的实验室研究[J].河北冶金,2014(3):1-5.)
[11]Liu Yu,Liu Bingguo,Xing Xiaozhong.Research on dezincification of blast furnace flue slime by carbothermal reduction method[J].Inorganic Chemicals Industry,2013,45(10):39-41.(刘瑜,刘秉国,邢晓钟.高炉瓦斯泥碳热还原脱锌研究[J].无机盐工业,2013,45(10):39-41.)
[12]Liu Jianhua,Zhang Jiayun,Zhou Tuping.Influence of foreign oxides on reduction kinetics of iron oxides[J].Journal of Iron and Steel Research,2000,12(4):55-58.(刘建华,张家芸,周土平,氧化物杂质对铁氧化物还原动力学的影响[J].钢铁研究学报,2000,12(4):55-58.)
[13]Nasr M I,Omar A A,Khedr M H.Effect of nickel oxide doping on the kinetics and mechanism of iron oxide reduction[J].Transactions of the Iron&Steel Institute of Japan,1995,35(9):1043-1049.