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Catalytic mechanism of manganese ions and visible light on chalcopyrite bioleaching in the presence of Acidithiobacillus ferrooxidans

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Chinese Journal of Chemical Engineering 2022年第1期35卷 457-465页

作者： Chunxiao Zhao Baojun Yang Rui Liao Maoxin Hong Shichao Yu Jun Wang guanzhou qiu Key Laboratory of Biohydrometallurgy of Ministry of Education School of Minerals Processing&BioengineeringCentral South UniversityChangsha 410083China

The bioleaching of chalcopyrite is low cost and environmentally friendly,but the leaching rate is *** explore the mechanism of chalcopyrite bioleaching and improve its leaching rate,the effect and mechanism of manganese ions(Mn^(2+))and visible light on chalcopyrite mediated by Acidithiobacillus ferrooxidans(***)were *** experiments showed that when both Mn^(2+)and visible light were present,the copper extraction was 14.38%higher than that of the control system(without Mn^(2+)and visible light).Moreover,visible light and Mn^(2+)promoted the growth of *** electron microscopy(SEM)and energy dispersive spectrometer(EDS)analysis revealed that Mn^(2+)promoted the formation of extracellular polymeric substance(EPS)on the surface of chalcopyrite,changed the morphology of ***,enhanced the adsorption of bacteria on chalcopyrite surface with light illumination,and thus promoted the bioleaching of ***–vis absorbance spectra indicated that Mn^(2+)promoted the response of chalcopyrite to visible light and enhanced the catalytic effect of visible light on chalcopyrite *** on X-ray photoelectron spectroscopy(XPS),the relevant sulfur speciation of chalcopyrite before and after bioleaching were analyzed and the results revealed that visible light and Mn^(2+)promoted chalcopyrite bioleaching by reducing the formation of passivation layer(S_(n)^(2-)/S0).Investigation into electrochemical results further indicated that Mn^(2+)and visible light improved the electrochemical activity of chalcopyrite,thus increasing the bioleaching rate.

关键词： Acidithiobacillus ferrooxidans Mn^(2+) Electrochemistry Catalysis Dissolution

Inhibition of hematite on acid mine drainage caused by chalcopyrite biodissolution

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Chinese Journal of Chemical Engineering 2022年第4期35卷 94-104页

作者： Baojun Yang Wen Luo Maoxin Hong Jun Wang Xueduan Liu Min Gan guanzhou qiu School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Key Laboratory of Biohydrometallurgy Ministry of EducationCentral South UniversityChangsha 410083China Department of Dermatology The First Hospital of ChangshaChangsha 410005China

Even though biodissolution of chalcopyrite is considered to be one of the key contributors in the formation of acid mine drainage(AMD),there are few studies to control AMD by inhibiting chalcopyrite ***,a novel method of using hematite to inhibit chalcopyrite biodissolution was proposed and *** results indicated that chalcopyrite biodissolution could be significantly inhibited by hematite,which consequently decreased the formation of *** the presence of hematite,the final biodissolution rate of chalcopyrite decreased from 57.9%to 44.4%at 20 *** in turn suggested that the formation of AMD was effectively suppressed under such *** to the biodissolution results,mineral composition and morphology analyses,and electrochemical analysis,it was shown that hematite promoted the formation and accumulation of passivation substances(jarosite and Cu2-xS)on chalcopyrite surface,thus inhibiting the biodissolution of chalcopyrite and limiting the formation of AMD.

关键词： Chalcopyrite Hematite Biodissolution Acid mine drainage Acidithiobacillus ferrooxidans

Chalcocite(bio)hydrometallurgy-current state,mechanism,and future directions:A review

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Chinese Journal of Chemical Engineering 2022年第1期35卷 109-120页

作者： Shichao Yu Rui Liao Baojun Yang Chaojun Fang Zhentang Wang Yuling Liu Baiqiang Wu Jun Wang guanzhou qiu School of Minerals Processing&Bioengineering Central South UniversityChangsha 410083China Key Lab of Biohydrometallurgy of Ministry of Education Changsha 410083China College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454000China Wanbao Mining Ltd. Beijing 100053China

There has been a strong interest in technologies suited for mining and processing of low-grade ores because of the rapid depletion of mineral resources in the *** most cases,the extraction of copper from such raw materials is achieved by applying the leaching ***,its low extraction efficiency and the long extraction period limit its large-scale commercial applications in copper recovery,even though bioleaching has been widely employed commercially for heap and dump bioleaching of secondary copper sulfide *** the technical challenges requires a better understanding of leaching kinetics and on-site microbial ***,this paper reviews the current status of main commercial biomining operations around the world,identifies factors that affect chalcocite dissolution both in chemical leaching and bioleaching,summarizes the related kinetic research,and concludes with a discussion of two on-site chalcocite heap leaching ***,the challenges and innovations for the future development of chalcocite hydrometallurgy are presented in the end.

关键词： Chalcocite Bioleaching Heap leaching Kinetics Copper sulfides Hydrometallurgy

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生物冶金技术的研究现状及发展趋势

生物学杂志 2024年第3期41卷 1-10页

作者：杨宝军刘洋刘红昌李咏梅甘敏王军廖蕤章可朱振宇邱冠周中南大学资源加工与生物工程学院长沙410083 中南大学生物冶金教育部重点实验室长沙410083 南华大学资源环境与安全工程学院衡阳421001

低品位矿产资源的开发利用制约着全球绿色可持续发展,生物冶金技术是实现矿物加工和有色金属冶金领域绿色可持续发展的前沿性技术,同时在矿山重金属污染场地原位修复中发挥重要作用。综述了生物冶金技术的基本概念、微生物生理特征和作... 详细信息

低品位矿产资源的开发利用制约着全球绿色可持续发展,生物冶金技术是实现矿物加工和有色金属冶金领域绿色可持续发展的前沿性技术,同时在矿山重金属污染场地原位修复中发挥重要作用。综述了生物冶金技术的基本概念、微生物生理特征和作用机制,以及生物冶金在硫化铜矿浸出、难处理金矿氧化预处理、铀矿浸提、稀土提取等方面的应用和研究现状,提出未来应针对高效浸出微生物选育、生物浸出界面作用机制、高效节能装置和工程化技术等方面开展研究,并进一步拓展生物冶金技术研究及应用领域。

关键词：生物冶金铜矿金矿铀矿稀土

Design and development of expert system for controlling sintering process

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中国有色金属学会会刊：英文版 1999年第3期9卷 651-654页

作者： Wang Haidong(王海东) qiu guanzhou(邱冠周) Huang Shengsheng(黄圣生) Cent S Univ Technol Dept Mineral Engn Changsha 410083 Peoples R China

The general structure of expert system for controlling sintering process has been proposed. It includes knowledge base, inference engine, data acquisition system, learning system, knowledge base management system, explanation system and so on. The control functions consist of sintering chemical composition control centered on basicity and sintering process state control centered on permeability. The adaptive prediction of sintering chemical composition, the control strategy centered on basicity, the control strategy centered on permeability, the judgement of permeability and the prediction of burn through point were studied. The software of system, which includes about 1 000 expert rules, was successfully applied in off line control of sintering process in a sintering plant.

关键词： sintering expert system process control

FLOTATION　CLASSIFICATION　APPROACH　BY　CONTROLLING　INTERACTIONS　BETWEEN　PARTICLES

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中国有色金属学会会刊：英文版 1995年第4期5卷 58-63页

作者： Luo, Lin qiu, guanzhou Hu, Yuehua Wang, Dianzuo He, Boquan Central South Univ of Technology Changsha China

ＦＬＯＴＡＴＩＯＮＣＬＡＳＳＩＦＩＣＡＴＩＯＮＡＰＰＲＯＡＣＨＢＹＣＯＮＴＲＯＬＬＩＮＧＩＮＴＥＲＡＣＴＩＯＮＳＢＥＴＷＥＥＮＰＡＲＴＩＣＬＥＳＬｕｏＬｉｎ；ＱｉｕＧｕａｎｚｈｏｕ；ＨｕＹｕｅｈｕａ；ＷａｎｇＤｉａｎ... 详细信息

ＦＬＯＴＡＴＩＯＮＣＬＡＳＳＩＦＩＣＡＴＩＯＮＡＰＰＲＯＡＣＨＢＹＣＯＮＴＲＯＬＬＩＮＧＩＮＴＥＲＡＣＴＩＯＮＳＢＥＴＷＥＥＮＰＡＲＴＩＣＬＥＳＬｕｏＬｉｎ；ＱｉｕＧｕａｎｚｈｏｕ；ＨｕＹｕｅｈｕａ；ＷａｎｇＤｉａｎｚｕｏ（ＤｅｐａｒｔｍｅｎｔｏｆＭ...

关键词： flotation classification interactions theoretical model

MOLTEN SALT PHASE DIAGRAMS CALCULATION USING ARTIFICIAL NEURAL NETWORK OR PATTERN RECOGNITION-BOND PARAMETERS PART *** OF LIQUIDUS TEMPERATURE AND EXPERT SYSTEM

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中国有色金属学会会刊：英文版 1998年第3期8卷 150-154页

作者： Wang, Xueye qiu, guanzhou Wang, Dianzuo Li, Chonghe Chen, Nianyi Central South Univ of Technology Changsha China

１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｅｘｐｅｒｉｍｅｎｔａｌｄａｔａｏｎｔｈｅｌｉｑｕｉｄｕｓｌｉｎｅｓｏｒｓｕｒｆａｃｅｓｉｎｂｉｎａｒｙｏｒｔｅｒｎａｒｙｓｙｓｔｅｍｓｆｒｏｍｒｅｆｅｒｅｎｃｅｓａｒｅａｌｗａｙｓ... 详细信息

１ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅｅｘｐｅｒｉｍｅｎｔａｌｄａｔａｏｎｔｈｅｌｉｑｕｉｄｕｓｌｉｎｅｓｏｒｓｕｒｆａｃｅｓｉｎｂｉｎａｒｙｏｒｔｅｒｎａｒｙｓｙｓｔｅｍｓｆｒｏｍｒｅｆｅｒｅｎｃｅｓａｒｅａｌｗａｙｓｆｉｎｉｔｅ．Ｓｏｍｅｔｉｍｅｓｔ...

关键词： phase diagram calculation artificial neural network bond parameter molten salt system expert system

Electrochemical behaviors of silicon wafers in silica slurry

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Journal of University of Science and Technology Beijing 2008年第4期15卷 495-499页

作者： Xiaolan Song Haiping Yang Xunda Shi Xi He guanzhou qiu Department of Inorganic Materials School of Minerals Processing and Bioengineering Central South University Changsha 410083 China Silicon Wafer Manufacture Department Grinm Semiconductor Materials Co. Ltd. Beijing 100088 China

The electrochemical behaviors of n-type silicon wafers pH value and solid content of the slurry on the corrosion of silicon in silica-based slurry were investigated, and the influences of the wafers were studied by using electrochemical DC polarization and AC impedance techniques. The results revealed that these factors affected the corrosion behaviors of silicon wafers to different degrees and had their suitable parameters that made the maximum corrosion rate of the wafers. The corrosion potential of （100） sttrface was lower than that of（111）, whereas the current density of （100） was much higher than that of（111）.

关键词： silicon wafers electrochemical behavior impedance corrosion polarization curves

CARRIER FLOTATION OF ULTRAFINE PARTICLE WOLFRAMITE

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中国有色金属学会会刊：英文版 1994年第4期4卷 10-15页

作者： Hu, Yuehua qiu, guanzhou Luo, Lin Xu, Jin Wang, Dianzuo Central South Univ of Technology Changsha China

ＣＡＲＲＩＥＲＦＬＯＴＡＴＩＯＮＯＦＵＬＴＲＡＦＩＮＥＰＡＲＴＩＣＬＥＷＯＬＦＲＡＭＩＴＥ￥Ｈｕ，Ｙｕｅｈｕａ；Ｑｉｕ，Ｇｕａｎｚｈｏｕ；Ｌｕｏ，Ｌｉｎ；Ｘｕ，Ｊｉｎ；Ｗａｎｇ，Ｄｉａｎｚｕｏ（ＭｉｎｅｒａｌＥｎｇｉ... 详细信息

ＣＡＲＲＩＥＲＦＬＯＴＡＴＩＯＮＯＦＵＬＴＲＡＦＩＮＥＰＡＲＴＩＣＬＥＷＯＬＦＲＡＭＩＴＥ￥Ｈｕ，Ｙｕｅｈｕａ；Ｑｉｕ，Ｇｕａｎｚｈｏｕ；Ｌｕｏ，Ｌｉｎ；Ｘｕ，Ｊｉｎ；Ｗａｎｇ，Ｄｉａｎｚｕｏ（ＭｉｎｅｒａｌＥｎｇｉｎｅｅｒｉｎｇＤｅｐａｒｔｍｅｎｔ...

关键词： wolframite carrier flotation mechanism