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Agglomeration and leaching behaviors of copper oxides with different chemical binders

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International Journal of Minerals,Metallurgy and Materials 2021年第7期28卷 1127-1134页

作者： sheng-hua yin Lei-ming Wang Xun Chen Ai-xiang Wu Key Laboratory of the Ministry of Education of China for High-Efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China Department of Materials Engineering University of British Columbia309-6350 Stores RoadVancouverBC V6T 1Z4Canada

The chemical binder is one of the critical factors affecting ore agglomeration behavior and leaching *** this study,we in-vestigated the effect of the type of binder and mass fraction of the H_(2)SO_(4)solution used on the curing,soaking,and leaching behavior of *** results revealed that Portland cement(3CaO·SiO_(2),2CaO·SiO_(2),and 3CaO·Al_(2)O_(3))was the optimal binder for obtaining a well-shaped,stable agglomeration structure.A higher extraction rate was achieved when using Portland cement than that obtained using sodi-um silicate,gypsum,or acid-proof *** excessive geometric mean size is not conducive to obtaining well-shaped agglomerations and desirable *** computed tomography(CT)and MATLAB,the porosity of two-dimensional CT images in sample concentrations L1-L3 was observed to increase at least 4.5vol%after acid *** agglomerations began to be heavily destroyed and even to disinteg-rate when the sulfuric acid solution concentration was higher than 30 g/L,which was caused by the excessive accumulation of reaction products and residuals.

关键词： agglomeration binder acid leaching copper oxide sulfuric acid solution

Simulation of solute transportation within porous particles during the bioleaching process

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International Journal of Minerals,Metallurgy and Materials 2010年第4期17卷 389-396页

作者： sheng-hua yin Ai-xiang Wu Shao-yong Wang Hong-jiang Wang School of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China School of Mechanical Engineering University of Western Australia Perth 6009 Australia

A mathematical model, accounting for the sulfuric acid and ferric ions diffusion and the copper sulfide mineral leaching process, was developed for an ore particle by considering its porous structure. It was simulated with the simulation tool COMSOL Multiphysics. The simulation results show that the highest acid and ferric concentrations near the particle surface are apparent, while the concentrations in the central particle increase slightly as the less-porous ore core with low permeability prevents the oxidation from penetrating. The extraction of the mineral near the particle surface is the maximum, mainly because of ample sulfuric acid, ferric ions, bacteria, and oxygen available for the leaching process. Because of low oxidation concentration in the central part of the particle, the reaction rate and copper sulphide conversion are small. The simulation shows good agreement with the experimental results.

关键词： simulation solute transportation bioleaching copper sulphide porous particle

Review and prospects of bioleaching in the Chinese mining industry

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International Journal of Minerals,Metallurgy and Materials 2021年第9期28卷 1397-1412页

作者： sheng-hua yin Wei Chen Xing-le Fan Jia-ming Liu Li-bo Wu Key Laboratory of Ministry of Education for High-Efficient Mining and Safety of Metal University of Science and Technology BeijingBeijing 100083China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China

As the world’s second largest economy experiencing rapid economic growth,China has a huge demand for metals and *** recent years,China ranks first,among all the countries in the world,in the production and consumption of several metals such as copper,gold,and rare earth ***,which is an approach for mining low grade and refractory ores,has been applied in industrial production,and bioleaching has made great contributions to the development of the Chinese mining *** exploration and application of bioleaching in China are reviewed in this *** and consumption trends of several metals in China over the past decade are *** processes at key bioleaching operations in China,such as at the Zijinshan Copper Mine and Mianhuakeng Uranium Mine,are ***,the current challenges faced by bioleaching operations in China are ***,prospects such as efficiency improvement and environmental protection are proposed based on the current situation in the Chinese bioleaching industry.

关键词： bioleaching China mining copper uranium rare earth oxides gold

Unsaturated flow and solute transport in a porous column using spherical ore particles

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International Journal of Minerals,Metallurgy and Materials 2014年第2期21卷 113-121页

作者： Xiu-xiu Miao Ai-xiang Wu Bao-hua Yang Jin-zhi Liu sheng-hua yin Hong-jiang Wang Key Laboratory of High-Efficient Mining and Safety of Metal Mines (Ministry of Education) University of Science and Technology Beijing School of Information Science and Engineering Hunan International Economics University College of Information Technology Shanghai Ocean University

This paper dealt with the development of a two-dimensional （2D） mathematical model for column leaching and confirmed the important simulation parameters through experiment. The unsaturated state of the variably saturated flow column and the solute transport of copper ions were studied during leaching. The fluid flow problem was handled using the Richards equation on the premise of an ambient pressure column air, where the van Genuchten formulas were applied to define the nonlinear relationships of pressure head with the retention and permeability properties. The ore column permeability test gave a varied hydraulic conductivity, which was analyzed in the model. In the solute transport problem, the copper ion concentration was solved using the advection-diffusion-reaction equation whose reaction term was determined by the joint analysis of experimental copper leaching rate and the shrinking core model. Particle-and column-scale leaching tests were carried out to illustrate the difference and connection of copper extraction in both processes. This fluid flow and solute transport cou-pled model was determined through the finite element method using the numerical simulation software, COMSOL Multiphysics.

关键词： mathematical models leaching unsaturated flow solute transport

Research progress in enhanced bioleaching of copper sulfides under the intervention of microbial communities

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International Journal of Minerals,Metallurgy and Materials 2019年第11期26卷 1337-1350页

作者： sheng-hua yin Lei-ming Wang Ai-xiang Wu Xun Chen Rong-fu Yan Key Laboratory of the Ministry of Education of China for High-Efficient Mining and Safety of Metal Mines University of Science and Technology BeijingBeijing 100083China School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China Department of Materials Engineering University of British ColumbiaVancouver V6T 1Z4Canada

Compared with the traditional pyrometallurgical process, copper bioleaching has distinctive advantages of high efficiency and lower cost, enabling efficiently extracts of valuable metal resources from copper sulfides. Moreover, during long-term industrial applications of bioleaching, many regulatory enhancements and technological methods are used to accelerate the interfacial reactions. With advances in microbial genetic and sequencing technologies, bacterial communities and their mechanisms in bioleaching systems have been revealed gradually. The bacterial proliferation and dissolution of sulfide ores by a bacterial community depends on the pH, temperature, oxygen, reaction product regulation, additives, and passivation substances, among other factors. The internal relationship among the influencing factors and the succession of microorganism diversity are discussed and reviewed in this paper. This paper is intended to provide a good reference for studies related to enhanced bioleaching.

关键词： bioleaching copper sulfide heap leaching microbial community succession enhanced mechanism

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安陆方言物量词比较研究

中南民族大学学报（人文社会科学版） 2005年第1期25卷 167-170页

作者：盛银花湖北教育学院中文系湖北武汉430060

在安陆方言物量词中,有的为安陆方言所特有,有的与普通话相同,但在和名词的配合上,与普通话并不一一对应,这就形成了安陆方言物量词与普通话物量词之间多义性与交叉性、近义性与差异性、具体性与模糊性的对立。这些差异的根源在于古汉... 详细信息

在安陆方言物量词中,有的为安陆方言所特有,有的与普通话相同,但在和名词的配合上,与普通话并不一一对应,这就形成了安陆方言物量词与普通话物量词之间多义性与交叉性、近义性与差异性、具体性与模糊性的对立。这些差异的根源在于古汉语物量词的不同遗留和特有的民俗文化的影响。

关键词：安陆方言普通话物量词语义语法

Advancements and Challenges in Organic–Inorganic Composite Solid Electrolytes for All‑Solid‑State Lithium Batteries

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Nano-Micro Letters 2025年第1期17卷 46-97页

作者： Xueyan Zhang Shichao Cheng Chuankai Fu Geping yin Liguang Wang Yongmin Wu hua Huo State Key Laboratory of Space Power‑Sources School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001People’s Republic of China College of Chemical and Biological Engineering Zhejiang UniversityHangzhou 310058People’s Republic of China State Key Laboratory of Space Power-Sources 2965 Dongchuan RoadMinhang DistrictShanghai 200240People’s Republic of China

To address the limitations of contemporary lithium-ion batteries,particularly their low energy density and safety concerns,all-solid-state lithium batteries equipped with solid-state electrolytes have been identified as an up-and-coming *** the various SEs,organic–inorganic composite solid electrolytes(OICSEs)that combine the advantages of both polymer and inorganic materials demonstrate promising potential for large-scale ***,OICSEs still face many challenges in practical applications,such as low ionic conductivity and poor interfacial stability,which severely limit their *** review provides a comprehensive overview of recent research advancements in ***,the influence of inorganic fillers on the main functional parameters of OICSEs,including ionic conductivity,Li+transfer number,mechanical strength,electrochemical stability,electronic conductivity,and thermal stability are systematically *** lithium-ion conduction mechanism of OICSE is thoroughly analyzed and concluded from the microscopic ***,the classic inorganic filler types,including both inert and active fillers,are categorized with special emphasis on the relationship between inorganic filler structure design and the electrochemical performance of ***,the advanced characterization techniques relevant to OICSEs are summarized,and the challenges and perspectives on the future development of OICSEs are also highlighted for constructing superior ASSLBs.

关键词： Composite solid electrolytes Inorganic filler Interfacial stability Li-ion conduction mechanism Characterization techniques

Effect of ore size and heap porosity on capillary process inside leaching heap

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Transactions of Nonferrous Metals Society of China 2016年第3期26卷 835-841页

作者：尹升华王雷鸣陈勋吴爱祥北京科技大学金属矿山高效开采与安全教育部重点实验室北京100083 北京科技大学土木与环境工程学院北京100083

The capillary process coexists with gravity flow within leaching heap due to the dual-porosity structure. Capillary rise is responsible for the mineral dissolution in fine particle zones and interior coarse rock. The effect of particle size and heap porosity on the capillary process was investigated through a series of column tests. Macropore of the ore heap was identified, and its capillary rise theory analysis was put forward. Two groups of ore particles, mono-size and non-uniform, were selected for the capillary rise test. The result shows that particle size has an inverse effect on the capillary ultimate height, and smaller particles exhibit higher capillary rise. Meanwhile, the poorly graded group exhibits small rise height and velocity, while the capillary rise in the well-graded particles is much greater. The relationship between porosity and fitting parameters of capillary rise was obtained. Low porosity and high surface tension lead to higher capillary height of the fine gradation. Moisture content increases with the capillary rise level going up, the relationship between capillary height and moisture content was obtained.

关键词： heap leaching capillary process ore size heap porosity

Multiple Tin Compounds Modified Carbon Fibers to Construct Heterogeneous Interfaces for Corrosion Prevention and Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第1期17卷 507-527页

作者： Zhiqiang Guo Di Lan Zirui Jia Zhenguo Gao Xuetao Shi Mukun He hua Guo Guanglei Wu Pengfei yin College of Science Sichuan Agricultural UniversityYa’an 625014People’s Republic of China School of Materials Science and Engineering Hubei University of Automotive TechnologyShiyan 442002People’s Republic of China Institute of Materials for Energy and Environment State Key Laboratory of Bio‑Fibers and Eco‑TextilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071People’s Republic of China Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’anShaanxi 710072People’s Republic of China

Currently,the demand for electromagnetic wave(EMW)absorbing materials with specific functions and capable of withstanding harsh environments is becoming increasingly ***-component interface engineering is considered an effective means to achieve high-efficiency EMW ***,interface modulation engineering has not been fully discussed and has great potential in the field of EMW *** this study,multi-component tin compound fiber composites based on carbon fiber(CF)substrate were prepared by electrospinning,hydrothermal synthesis,and high-temperature thermal *** utilizing the different properties of different substances,rich heterogeneous interfaces are *** effectively promotes charge transfer and enhances interfacial polarization and conduction *** prepared SnS/SnS_(2)/SnO_(2)/CF composites with abundant heterogeneous interfaces have and exhibit excellent EMW absorption properties at a loading of 50 wt%in epoxy *** minimum reflection loss(RL)is−46.74 dB and the maximum effective absorption bandwidth is 5.28 ***,SnS/SnS_(2)/SnO_(2)/CF epoxy composite coatings exhibited long-term corrosion resistance on Q235 steel ***,this study provides an effective strategy for the design of high-efficiency EMW absorbing materials in complex and harsh environments.

关键词： Electrostatic spinning Component regulation Heterogeneous interfaces Electromagnetic wave absorption Corrosion protection