钒钛磁铁矿精矿弱还原—低酸浸出制备钛富集料的工艺研究
发布时间：2021-08-17 11:25
中国的钒钛磁铁矿（VTM）是典型的复杂多金属有价矿物资源。目前VTM精矿中有价元素回收利用的典型技术为高炉法。然而,采用这种冶炼方法,精矿中的钛元素基本进入高炉渣而难以回收,同时,高炉法的钒回收率也较低。为获得优质的TiO2富集料用于钛提取,本论文设计了一种提钛新工艺。主要技术手段是利用还原剂（碳或氢）弱还原VTM精矿后,经稀硫酸浸出,浸出残渣即为目标产物。弱还原可以破坏VTM的稳定结构,促进铁在弱酸中的浸出,实现TiO2的富集。本文主要结果如下:VTM精矿经还原后,大部分铁在浸出过程中会转移至液相,获得富含TiO2的残渣。结果表明,还原程度与后续的浸出效果密切相关。优化条件为:还原温度1000℃,保护气氛下还原3h,配碳量为VTM精矿质量的6%;在80℃下用0.2mol/L的H2SO4溶液（L/S比为100:1）浸出3-4 h。浸出残渣含少量水合水,由锐钛矿、Al2FeO4和Fe3O4组成。脱水后,TiO2含量为72.2wt%,主物相为金红石,伴生相为Fe2TiO5和Fe2O3。通过测定不同碳量还原后的相组成,得出铁的还原途径为原始磁铁矿→Fe2.75Ti0.25O4→Fe2.5Ti...
【文章来源】：中国科学院大学(中国科学院过程工程研究所)北京市
【文章页数】：96 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
Annotations of Symbols
1 Introduction
1.1 Background
1.2 Research Scope and Objectives
2 Background and Literature Review
2.1 Brief Introduction of VTM
2.2 Current Routes for the Utilization of the VTM
2.2.1 Blast furnace (BF) smelting process
2.2.2 Non-BF processes
2.3 Research Progress on the Gas-based Reduction of VTM
2.4 Summary of the Literature Review
3 Utilization of VTM by Partial Carbon Reduction and Mild AcidLeaching
3.1 Introduction
3.2 Experiment
3.2.1 Materials
3.2.2 Characterization of the VTM concentrates
3.2.3 Experimental procedures
3.2.4 Analysis methods
3.3 Results and Discussion
3.3.1 Direct leaching of VTM concentrates by mild acid without carbon reduction
3.3.2 Reduction of VTM concentrates with carbon characterized by leachingperformance with mild acid
3.3.3 Mild acid leaching of the reduced VTMs to concentrate titanium
3.3.4 Characterizations under the optimized conditions
3.4 Conclusions
4 Leaching of the Partially Reduced VTM by FeCl_3 Solution
4.1 Introduction
4.2 Experimental
4.2.1 Materials
4.2.2 Experimental procedures
4.2.3 Analysis methods
4.3 Results and Discussion
4.3.1 Leaching of the reduced VTMs with different reduction degrees by FeCl_3solution
4.3.2 The performance of other elements during FeCl_3 leaching after carbonreduction
4.3.3 Combined leaching of carbon reduced VTM by FeCl_3 solution followed bymild H_2SO_4 solution
4.4 Conclusions
5 Partial Reduction of VTM by H_2 Gas and the Effectiveness of MildAcid Leaching
5.1 Introduction
5.2 Experiment
5.2.1 Materials
5.2.2 Experimental procedures
5.2.3 Analysis methods
5.3 Results and Discussion
5.3.1 Effect of reduction temperature and time on weight loss
5.3.2 Leaching performance of the reduced VTMs with various reduction degrees
5.3.3 Phase compositions of the reduced VTMs and the leaching residues
5.3.4 Effect of acid intensity on the leaching of deep-reduced VTM
5.4 Conclusions
6 Conclusions and Future Work
6.1 Conclusions
6.2 Future Work
References
Acknowledgements
The author's resume and a list of published papers and research resultsduring study
【参考文献】：
期刊论文
[1]Thermodynamic studies on gas-based reduction of vanadium titano-magnetite pellets[J]. Jun-wei Chen,Yang Jiao,Xi-dong Wang. International Journal of Minerals Metallurgy and Materials. 2019(07)
[2]A novel process for the recovery of iron,titanium,and vanadium from vanadium-bearing titanomagnetite:sodium modification–direct reduction coupled process[J]. Yi-min Zhang,Ling-yun Yi,Li-na Wang,De-sheng Chen,Wei-jing Wang,Ya-hui Liu,Hong-xin Zhao,Tao Qi. International Journal of Minerals Metallurgy and Materials. 2017(05)
[3]Gas-based reduction of vanadium titano-magnetite concentrate: behavior and mechanisms[J]. Yu-lei Sui,Yu-feng Guo,Tao Jiang,Xiao-lin Xie,Shuai Wang,Fu-qiang Zheng. International Journal of Minerals Metallurgy and Materials. 2017(01)
[4]Reduction roasting–magnetic separation of vanadium tailings in presence of sodium sulfate and its mechanisms[J]. Yu-Lei Sui,Yu-Feng Guo,Andrew Yakovlevich Travyanov,Tao Jiang,Feng Chen,Guan-Zhou Qiu. Rare Metals. 2016(12)
[5]Metalizing reduction and magnetic separation of vanadium titano-magnetite based on hot briquetting[J]. Shuang-yin Chen,Man-sheng Chu. International Journal of Minerals Metallurgy and Materials. 2014(03)
[6]浓硫酸焙烧高钛渣的反应动力学（英文）[J]. 隋丽丽,翟玉春. Transactions of Nonferrous Metals Society of China. 2014(03)
[7]钒钛磁铁矿金属化球团熔分及TiO2富集试验研究[J]. 杨双平,汪剑,杜新,刘杰. 矿冶工程. 2014(01)
[8]Sticking of iron ore pellets in direct reduction with hydrogen and carbon monoxide:Behavior and prevention[J]. 易凌云,黄柱成,李铁辉,姜涛. Journal of Central South University. 2014(02)
[9]钒钛磁铁矿金属化球团熔分深还原试验研究[J]. 张宗旺,陈士朝,吴轩,郭振霆,杨华钧,陈钢. 钢铁研究. 2013(04)
[10]钒钛磁铁矿含碳球团的还原机制[J]. 曹明明,张建良,邢相栋,王春龙,白亚楠,文永才. 钢铁. 2012(08)
本文编号：3347674
【文章来源】：中国科学院大学(中国科学院过程工程研究所)北京市
【文章页数】：96 页
【学位级别】：硕士
【文章目录】：
摘要
Abstract
Annotations of Symbols
1 Introduction
1.1 Background
1.2 Research Scope and Objectives
2 Background and Literature Review
2.1 Brief Introduction of VTM
2.2 Current Routes for the Utilization of the VTM
2.2.1 Blast furnace (BF) smelting process
2.2.2 Non-BF processes
2.3 Research Progress on the Gas-based Reduction of VTM
2.4 Summary of the Literature Review
3 Utilization of VTM by Partial Carbon Reduction and Mild AcidLeaching
3.1 Introduction
3.2 Experiment
3.2.1 Materials
3.2.2 Characterization of the VTM concentrates
3.2.3 Experimental procedures
3.2.4 Analysis methods
3.3 Results and Discussion
3.3.1 Direct leaching of VTM concentrates by mild acid without carbon reduction
3.3.2 Reduction of VTM concentrates with carbon characterized by leachingperformance with mild acid
3.3.3 Mild acid leaching of the reduced VTMs to concentrate titanium
3.3.4 Characterizations under the optimized conditions
3.4 Conclusions
4 Leaching of the Partially Reduced VTM by FeCl_3 Solution
4.1 Introduction
4.2 Experimental
4.2.1 Materials
4.2.2 Experimental procedures
4.2.3 Analysis methods
4.3 Results and Discussion
4.3.1 Leaching of the reduced VTMs with different reduction degrees by FeCl_3solution
4.3.2 The performance of other elements during FeCl_3 leaching after carbonreduction
4.3.3 Combined leaching of carbon reduced VTM by FeCl_3 solution followed bymild H_2SO_4 solution
4.4 Conclusions
5 Partial Reduction of VTM by H_2 Gas and the Effectiveness of MildAcid Leaching
5.1 Introduction
5.2 Experiment
5.2.1 Materials
5.2.2 Experimental procedures
5.2.3 Analysis methods
5.3 Results and Discussion
5.3.1 Effect of reduction temperature and time on weight loss
5.3.2 Leaching performance of the reduced VTMs with various reduction degrees
5.3.3 Phase compositions of the reduced VTMs and the leaching residues
5.3.4 Effect of acid intensity on the leaching of deep-reduced VTM
5.4 Conclusions
6 Conclusions and Future Work
6.1 Conclusions
6.2 Future Work
References
Acknowledgements
The author's resume and a list of published papers and research resultsduring study
【参考文献】：
期刊论文
[1]Thermodynamic studies on gas-based reduction of vanadium titano-magnetite pellets[J]. Jun-wei Chen,Yang Jiao,Xi-dong Wang. International Journal of Minerals Metallurgy and Materials. 2019(07)
[2]A novel process for the recovery of iron,titanium,and vanadium from vanadium-bearing titanomagnetite:sodium modification–direct reduction coupled process[J]. Yi-min Zhang,Ling-yun Yi,Li-na Wang,De-sheng Chen,Wei-jing Wang,Ya-hui Liu,Hong-xin Zhao,Tao Qi. International Journal of Minerals Metallurgy and Materials. 2017(05)
[3]Gas-based reduction of vanadium titano-magnetite concentrate: behavior and mechanisms[J]. Yu-lei Sui,Yu-feng Guo,Tao Jiang,Xiao-lin Xie,Shuai Wang,Fu-qiang Zheng. International Journal of Minerals Metallurgy and Materials. 2017(01)
[4]Reduction roasting–magnetic separation of vanadium tailings in presence of sodium sulfate and its mechanisms[J]. Yu-Lei Sui,Yu-Feng Guo,Andrew Yakovlevich Travyanov,Tao Jiang,Feng Chen,Guan-Zhou Qiu. Rare Metals. 2016(12)
[5]Metalizing reduction and magnetic separation of vanadium titano-magnetite based on hot briquetting[J]. Shuang-yin Chen,Man-sheng Chu. International Journal of Minerals Metallurgy and Materials. 2014(03)
[6]浓硫酸焙烧高钛渣的反应动力学（英文）[J]. 隋丽丽,翟玉春. Transactions of Nonferrous Metals Society of China. 2014(03)
[7]钒钛磁铁矿金属化球团熔分及TiO2富集试验研究[J]. 杨双平,汪剑,杜新,刘杰. 矿冶工程. 2014(01)
[8]Sticking of iron ore pellets in direct reduction with hydrogen and carbon monoxide:Behavior and prevention[J]. 易凌云,黄柱成,李铁辉,姜涛. Journal of Central South University. 2014(02)
[9]钒钛磁铁矿金属化球团熔分深还原试验研究[J]. 张宗旺,陈士朝,吴轩,郭振霆,杨华钧,陈钢. 钢铁研究. 2013(04)
[10]钒钛磁铁矿含碳球团的还原机制[J]. 曹明明,张建良,邢相栋,王春龙,白亚楠,文永才. 钢铁. 2012(08)
本文编号：3347674
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