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Zinc extraction from zinc oxidized ore using(NH4)2SO4 roasting−leaching process

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International Journal of Minerals,metallurgy and Materials 2020年第11期27卷 1471-1481页

作者： Xiao-yi Shen Hong-mei Shao Ji-wen Ding Yan Liu Hui-min Gu Yu-chun Zhai key laboratory for ecological Utilization of multimetallic Mineral of ministry of education School of MetallurgyNortheastern UniversityShenyang 110819China School of Environmental and Chemical Engineering Shenyang Ligong UniversityShenyang 110159China School of Computer Science and Engineering Northeastern UniversityShenyang 110819China

An improved method of(NH4)2SO4 roasting followed by water leaching to utilize zinc oxidized ores was *** operating parameters were obtained by investigating the effects of the molar ratio of(NH4)2SO4 to zinc,roasting temperature,and holding time on zinc *** roasting process followed the chemical reaction control mechanism with the apparent activation energy value of 41.74 kJ·mol^−*** transformation of mineral phases in roasting was identified by X-ray diffraction analysis combined with thermogravimetry–differential thermal analysis *** water leaching conditions,including the leaching temperature,leaching time,stirring velocity,and liquid-to-solid ratio,were discussed,and the leaching kinetics was *** reaction rate was obtained under outer diffusion without product layer control;the values of the apparent activation energy for two stages were 4.12 and 8.19 kJ·mol^−*** maximum zinc extraction ratio reached 96%while the efficiency of iron extraction was approximately 32%under appropriate *** work offers an effective method for the comprehensive use of zinc oxidized ores.

关键词： zinc oxidized ore ammonium sulfate roasting,water leaching kinetics mechanism extraction ratio

metal-slag separation strengthening through in situ slagging during CuW composite preparation by metallothermic reduction

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Rare metals 2024年第11期43卷 6113-6121页

作者： Chu Cheng Xin-Yu Wang Ting-An Zhang Zhi-He Dou Ke-Xing Song Meng-Xin Wang Yan-Shuo Feng Tao Huang Hai-Tao Liu Xiao-Heng Li Kai Li School of Materials Science and Engineering Henan University of Science and TechnologyLuoyang 471023China Provincial and Ministerial Co-Construction of Collaborative Innovation Center for Non-Ferrous metal New Materials and Advanced Processing Technology Luoyang 471023China Henan key laboratory of Non-Ferrous Materials Science&Processing Technology Henan University of Science and TechnologyLuoyang 471003China key laboratory of ecological Utilization of multi-metal intergrown ores of ministry of education Northeastern UniversityShenyang 110819China Henan key laboratory of Advanced Conductor Materials Institute of MaterialsHenan Academy of Sciences Henan Academy of SciencesZhengzhou 450002China Henan Zhongyuan Gold Smelter. LLCSanmenxia 472100China Henan Pinggao Electric Co. LTDPingdingshan 467000China

CuW is widely used in high-voltage electrical switch contacts,rocket nozzle throat linings,electronic packaging materials and other major high-end *** is typically fabricated using infiltration and high-temperature sintering methods based on powder *** CuW composites fabricated using these methods have the disadvantages of low density and uneven microstructural distribution,the preparation of CuW composites by alu-minothermic reduction was proposed.

关键词： composites composite preparation

硫化银在硫酸铜-酒石酸盐-硫代硫酸盐溶液中的浸出研究

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Journal of Central South University 2023年第3期30卷 677-690页

作者：陈俊南谢锋王伟符岩王剑徐斌 key laboratory for ecological metallurgy of multimetallic ores(ministry of education) Northeastern UniversityShenyang 110819China School of metallurgy Northeastern UniversityShenyang 110819China Faculty of Materials Metallurgy and ChemistryJiangxi University of Science and TechnologyGanzhou 341000China School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China

由于氰化物具有高毒性,研究人员正在寻找一种环境友好和可持续的贵金属浸出工艺。硫代硫酸盐被认为是最有前途的替代浸出体系之一。传统的硫代硫酸盐浸出液一般由硫酸铜和氨组成,其中硫酸铜作为氧化剂,氨作为铜离子稳定剂。然而,氨也是... 详细信息

由于氰化物具有高毒性,研究人员正在寻找一种环境友好和可持续的贵金属浸出工艺。硫代硫酸盐被认为是最有前途的替代浸出体系之一。传统的硫代硫酸盐浸出液一般由硫酸铜和氨组成,其中硫酸铜作为氧化剂,氨作为铜离子稳定剂。然而,氨也是有毒试剂。为此,本文研究了一种新型的、环保的硫酸铜-酒石酸盐-硫代硫酸盐体系用于硫化银的浸出,并考察了转速、温度、初始pH值、硫酸铜、酒石酸盐和硫代硫酸盐浓度以及不同气氛对硫化银溶解速率的影响。在硫酸铜-酒石酸盐-硫代硫酸盐溶液中,硫化银的溶解过程受化学反应控制,其表观活化能为43.49 kJ/mol。硫化银浸出的反应级数与硫酸铜、酒石酸盐和硫代硫酸盐浓度的关系分别为0.491、1.366和0.916。对比Ag_(2)S浸出前、后的XRD分析结果,提出了Ag_(2)S在硫酸铜-酒石酸盐-硫代硫酸盐溶液中可能的溶解路线,即Ag_(2)S被Cu(Ⅰ)-S_(2)O_(3)^(2-)逐步取代,生成中间产物Ag_(3)CuS_(2)、AgCuS和(Ag,Cu)_(2)S,最终以Ag(S_(2)O_(3))_(2)^(3-)的形式进入溶液。XPS分析结果表明单质S是Ag_(2)S中硫离子的最终氧化产物。

关键词：硫化银酒石酸盐硫代硫酸盐浸出

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

Effect of temperature on leaching behavior of copper minerals with different occurrence states in complex copper oxide ores

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Transactions of Nonferrous metals Society of China 2019年第10期29卷 2192-2201页

作者： Gai-rong WANG Yuan-yuan LIU Lin-lin TONG Zhe-nan JIN Guo-bao CHEN Hong-ying YANG key laboratory for ecological metallurgy of multimetallic Mineral (ministry of education) Northeastern UniversityShenyang 110819China School of metallurgy Northeastern UniversityShenyang 110819China CNMC Luanshya Copper Mines Plc (CLM) Independence AvenueLuanshya City90456Zambia

The effect of temperature on leaching behavior of copper minerals with different occurrence states in complex copper oxide ores was carried out by phase analysis means of XRD, optical microscopy and SEM-EDS. The results indicated that at ambient temperature, the easily leached copper oxide minerals were completely dissolved, while the bonded copper minerals were insoluble. At lukewarm temperature of 40℃, it was mainly the dissolution of copper in isomorphism state. With increasing temperature to 60℃, the copper leaching rate in the adsorbed state was significantly accelerated. In addition, when the temperature increased to 80℃, the isomorphic copper was completely leached, leaving 11.2% adsorbed copper un-leached. However, the copper in feldspar-quartz-copper-iron colloid state was not dissolved throughout the leaching process. Overall, the leaching rates of copper in different copper minerals decreased in the order: malachite, pseudo-malachite > chrysocolla > copper-bearing chlorite > copper-bearing muscovite > copper-bearing biotite > copper-bearing limonite > feldspar-quartz-copper-iron colloid.

关键词： complex copper oxide ores occurrence state temperature leaching behavior copper minerals