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Oxidative acid leaching behavior of Fe–Ni–Co alloy powder derived from a laterite ore

International Journal of minerals,Metallurgy and Materials 2025年第4期32卷 825-834页

作者： Meishi Hu Jing Chen Mingjun Rao Siyu Chen Jun Luo Guanghui Li Tao Jiang School of Minerals Processing&Bioengineering Central South UniversityChangsha 410083China College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China

The demand for Ni and Co has surged due to the rapid expansion of the electric vehicle industry. Thus, developing efficient and eco-friendly metallurgical routes for extracting these metals has become imperative. This study introduces a sustainable and effective method for extracting Ni and Co from Ni–Co–Fe alloy powder obtained from limonitic laterite ores through selective reduction and magnetic separation. The leaching efficiency for Ni, Co, and Fe was 89.4%, 94.8%, and 96.5%, respectively, under the following conditions for leaching: 3 mol/L H_(2)SO_(4), 85℃, 10 m L/g liquid–solid ratio, and 90 min leaching time. The incorporation of H_(2)O_(2) enhanced the leaching efficiency for Ni, Co, and Fe. The redox potential of the solution plays a crucial role in acid dissolution, and H_(2)O_(2) enhances Ni and Co dissolution. Phosphate precipitation facilitated the removal of Fe from the leachate, affording a 96.1% Fe removal ratio and 2.29% Ni loss.

关键词： Ni–Co–Fe alloy powder atmospheric acid leaching oxidation–reduction potential of solution laterite ore

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Biosynthesis of jarosite and schwertmannite for efficient adsorption of rare earth elements from mine wastewater

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Journal of Central South University 2025年第3期32卷 962-976页

作者： ZHAO Chun-xiao WANG Jun TANG Gu-xiu LIU Yang YANG Bao-jun LIU Hong-chang QIU Guan-zhou School of Minerals Processing&Bioengineering Central South UniversityChangsha 410083China Key Laboratory of Biohydrometallurgy of Ministry of Education Changsha 410083China China Rare Earth Group Shandong Co. Ltd.Jining 277600China

With the growing awareness of environmental protection and the increasing demand for rare earth elements(REEs),it has become necessary to efficiently remove and recover REEs from mine *** this study,jarosite(Jar)and schwertmannite(Sch)were biosynthesized using Acidithiobacillus ferrooxidans for the adsorption of ***,the adsorption capacities of Jar and Sch for La^(3+),Ce^(3+),Pr^(3+),Nd^(3+),Sm^(3+),Gd^(3+),Dy^(3+),and Y^(3+)in mine wastewater were improved by mechanical ***,FTIR,BET,and SEM-EDS analyses revealed that mechanical activation did not alter the phase of the material,but increased the amount of surface-OH and SO42−groups,as well as the specific surface *** significantly enhanced the adsorption performance of Jar and Sch for *** optimum adsorption time and pH were determined through batch adsorption ***,the adsorption kinetics were studied and found to align well with the pseudo-second-order ***,the thermodynamic parameters(ΔG^(Θ),ΔH^(Θ)andΔS^(Θ))and adsorption isotherms were *** results indicated that mechanically activated schwertmannite(M-Sch)exhibited superior adsorption performance for REEs compared to mechanically activated jarosite(M-Jar).Moreover,M-Sch was reusable and exhibited high adsorption efficiency of REEs in actual mine wastewater,exceeding 92%.

关键词： mechanical activation Acidithiobacillus ferrooxidans adsorption rare earth elements jarosite schwertmannite

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Recycling technologies of spent lithium-ion batteries and future directions:A review

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Transactions of Nonferrous Metals Society of China 2025年第1期35卷 271-295页

作者： Xue-song GAO Meng WU Guang-jin ZHAO Kun-hong GU Jia-jia WU Hong-bo ZENG Wen-qing QIN Jun-wei HAN School of Minerals Processing&Bioengineering Central South UniversityChangsha 410083China Department of Chemical and Materials Engineering University of AlbertaEdmonton T6G 1H9Canada Electric Power Research Institute Henan Electric Power CompanySTATE GRID Corporation of ChinaZhengzhou 450052China

Lithium-ion batteries(LIBs)are the most popular energy storage devices due to their high energy density,high operating voltage,and long cycle ***,green and effective recycling methods are needed because LIBs contain heavy metals such as Co,Ni,and Mn and organic compounds inside,which seriously threaten human health and the *** this work,we review the current status of spent LIB recycling,discuss the traditional pyrometallurgical and hydrometallurgical recovery processes,and summarize the existing short-process recovery technologies such as salt-assisted roasting,flotation processes,and direct ***,we analyze the problems and potential research prospects of the current recycling process,and point out that the multidisciplinary integration of recycling will become the mainstream technology for the development of spent LIBs.

关键词： spent lithium battery short-process recycling secondary resources pretreatment metal recovery

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Enrichment of Nb and Ti from carbonatite pyrochlore ore via calcining-slaking followed by gravity separation

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International Journal of Mining Science and Technology 2022年第3期32卷 615-626页

作者： Shuhui Zhang Mingjun Rao Rendong Xiao Jinxiang You Guanghui Li Tao Jiang School of Minerals Processing&Bioengineering Central South UniversityChangsha 410083China

In this work,a novel process consisting of calcining-slaking followed by gravity separation for the enrichment of niobium(Nb)and titanium(Ti)from carbonatite pyrochlore ore was proposed,validated and compared with the current mainstream flotation *** calcining of the pyrochlore ore,within which the carbonates were transformed into ***,when the calcined ore was slaked,lime was transformed into hydroxide with fine particles which were amenable to gravity *** calcining at 900℃for 60 min,slaking at 90℃for 10 min with a liquid–solid ratio of 3:1(mL/g),approximately 40%of tailings can be removed by gravity separation,the recoveries of Nb and Ti were 94.7%and 91.0%,and the enrichment ratios of Nb and Ti were 1.61 and 1.43,*** new approach exhibits high separation efficiency of carbonate gangue minerals and valuable minerals,satisfactory recoveries of niobium as well as titanium can be achieved.

关键词： Niobium Titanium Pyrochlore ore Calcination Gravity separation

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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

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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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不同晶型磁黄铁矿活化PDS降解工业废水中常见的罗丹明B:性能差异和机理

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Journal of Central South University 2023年第10期30卷 3276-3288页

作者：刘仕统王军刘洋杨宝军于世超洪茂鑫邱冠周 School of Minerals Processing&Bioengineering Central South UniversityChangsha 410083China Key Laboratory of Biohydrometallurgy of Ministry of Education Central South UniversityChangsha 410083China

本文研究了天然六方磁黄铁矿(HNP,Fe_(0.93)S)与天然单斜磁黄铁矿(MNP,Fe_(0.85)S)活化过硫酸盐(PDS)降解罗丹明B(RhB)的性能差异及其机理。结果表明,在酸性和弱碱性条件下,MNP/PDS体系的降解效率(pH=4时为97.15%)均高于HNP/PDS体系(pH=... 详细信息

本文研究了天然六方磁黄铁矿(HNP,Fe_(0.93)S)与天然单斜磁黄铁矿(MNP,Fe_(0.85)S)活化过硫酸盐(PDS)降解罗丹明B(RhB)的性能差异及其机理。结果表明,在酸性和弱碱性条件下,MNP/PDS体系的降解效率(pH=4时为97.15%)均高于HNP/PDS体系(pH=4时为86.91%),且两个体系的降解效率均随pH的升高而降低。MNP/PDS体系较高的降解效率与体系中较高的溶解铁浓度和MNP表面较强的反应性有关,且后者是主要因素,即降解反应主要发生在磁黄铁矿的表面及近表面处。MNP较强的表面反应性首先体现在其相对较高的Zeta电位,这使得MNP与PDS之间的静电引力更强,PDS更容易被MNP活化。其次,MNP表面具有更高的腐蚀电流密度,这有利于Fe(Ⅱ)对PDS的非均相活化以及表面还原性硫物种(如S^(2-)和S_(2)^(2-))作为电子给体将Fe(Ⅲ)还原为Fe(Ⅱ)(或Fe^(3+)还原为Fe^(2+))。此外,MNP表面的疏松氧化层在降解过程中容易脱落,进而暴露出新的表面活性位点。

关键词：天然磁黄铁矿不同晶型罗丹明B 过硫酸盐降解

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Comparison of sintering performance of typical specular hematite ores with distinct size distributions

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Journal of Iron and Steel Research International 2017年第10期24卷 1007-1015页

作者： Cong-cong Yang De-qing Zhu Ben-jing Shi Jian Pan Li-ming Lu Xiao-bo Li Ya-ping Mo School of Minerals Processing&Bioengineering Central South UniversityChangsha 410083HunanChina CSIRO Mineral Resources Brisbane QLD 4069Australia Products&Technique Management Department Baosteel Zhanjiang Iron and Steel Co.Ltd.Zhanjiang 524000GuangdongChina Ironmaking Plant Wuhan Iron and Steel Company LimitedWuhan 430083HubeiChina

The sintering performance of three typical specular hematite ores（coarse SO-A,intermediate SO-B and ultrafine SO-C）was compared in an industrial ore blend through pilot-scale sinter pot *** effect of particle size of specular hematite ores on their granulation and sintering performance was *** with the coarse SO-A fine and ultrafine SO-C concentrate,the intermediate SO-B showed inferior granulation and sintering performance characterized with poorer bed permeability and productivity,lower sinter strength and higher fuel rates.A new material preparation method was hence proposed and verified at both pilot and industrial *** proposed method by mixing SO-B with a high amount of goethitetype iron ore fines was found to be an effective way in improving the granulation and assimilative characteristics of ore blend comprising 31%intermediate SO-B,leading to improved sinter productivity and lowered fuel *** metallurgical properties and microstructure of sinters were also *** sinters obtained through the proposed preparation method were generally stronger and more reducible on account of better sinter structure with more relict hematite ultimately connected with needle-like silico-ferrite of calcium and aluminum and lower porosity.

关键词： Sinter Specularite Iron ore Size distribution Granulation Goethite

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Extraction of Cobalt from laterite ores by citric acid

Extraction of Cobalt from laterite ores by citric acid

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第五届国际湿法冶金学术会议(5th International Conference on Hydrometallurgy)

作者： Guanghui Li Mingjun Rao Qian Li Zhiwei Peng Tao Jiang School of Minerals Processing&Bioengineering Central South University Changsha Hunan 410083China

Citric acid has been proved to be one of the most effective organic acids to extract Nickel selectively from laterite *** attention has been paid to cobalt recovery compared to nickel recovery in many previous *** this paper, citric acid was used to particularly extract cobalt from laterite ores, and the effects of citric acid concentration, leaching time, and leaching temperature on cobalt extraction were investigated, and ammonium bifluoride was chosen to enhance the leaching of *** extraction of 84.5% Co was achieved from a laterite ore with 0.13% Co under the conditions of citric acid 30g/L, ammonium bifluoride 10g/L, leaching for 2 h at ambient temperature and atmospheric pressure, and 21.9% Ni was extracted from the ore at the same time.

关键词： laterite Cobalt citric acid ammonium bifluoride

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A promising method for recovery of LiMn_(2)O_(4) and graphite from waste lithium-ion batteries: Roasting enhanced flotation

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Journal of Central South University 2022年第9期29卷 2873-2887页

作者： HAN Jun-wei CHEN Ling-ling ZHONG Xue-hu WEI Xu-yi QIN Wen-qing School of Minerals Processing&Bioengineering Central South UniversityChangsha 410083China Department of Chemical and Materials Engineering University of AlbertaEdmonton T6G 1H9Canada

In this study,a roasting enhanced flotation process was proposed to recover LiMn_(2)O_(4) and grapite from waste lithium-ion batteries(LIBs).The effects of roasting temperature and time on the surface modification was investigated,and a series of analytical technologies were used to reveal process *** results indicate that LiMn_(2)O_(4) can be effectively separated from graphite via flotation after the *** flotation grade of LiMn_(2)O_(4) was significantly increased from 63.10%to 91.36%after roasting at 550℃for 2 *** TG-DTG analysis demonstrates that the difficulty in flotation separation of LiMn_(2)O_(4) from graphite is caused by the organic binder and electrolytes coating on their *** XRD,SEM,XPS,and contact angle analyses confirm that the organic films on the surfaces of those materials can be effectively removed by roasting,after which the wettability of LiMn_(2)O_(4) is regained and thus the surface wettability difference between the cathode and anode materials is increased *** closed-circuit flotation test indicates that a LiMn_(2)O_(4) sample with high grade of 99.81%is obtained,while the recovery of LiMn_(2)O_(4) is as high as 99.40%.This study provides an economical and eco-friendly way to recycling waste LIBs.

关键词： spent lithium-ion battery resource recycling roasting surface modification flotation

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