| 高钙型低品位铜矿酸性浸出动力学研究 |
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| 引用本文： | 高昭伟,曹成超,李耀山,孔德鸿,唐大才,刘远,王铧泰. 高钙型低品位铜矿酸性浸出动力学研究[J]. 矿冶工程, 2021, 41(6): 170-173. DOI: 10.3969/j.issn.0253-6099.2021.06.041 |
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| 作者姓名： | 高昭伟 曹成超 李耀山 孔德鸿 唐大才 刘远 王铧泰 |
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| 作者单位： | 西部矿业集团科技发展有限公司,青海 西宁810000;青海省高原矿物加工工程与综合利用重点实验室,青海 西宁 810000;青海省有色矿产资源工程技术研究中心,青海 西宁810000;肃北西矿钒科技有限公司,甘肃 酒泉736300 |
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| 基金项目： | 青海省重大科技专项资助项目计划项目(2018-GX-A7) |
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| 摘 要： | 通过单因素实验及动力学分析研究了低品位氧化铜矿的浸出过程，考察了矿物粒度、浸出温度、硫酸浓度和液固比对浸出过程的影响。结果表明，适宜的浸出条件为: 矿物粒度-0.074 mm粒级占比85%、浸出温度60 ℃、浸出时间120 min、硫酸浓度2.5 mol/L、液固比4∶1，此时铜浸出率为96.23%; CaCO3的存在导致浸出过程硫酸消耗增加; 浸出过程可用未反应核收缩模型来描述，反应速率受固膜界面传质和扩散混合控制，浸出过程活化能为8.78 J/mol。
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| 关 键 词： | 铜矿 硫酸浸出 动力学 |
| 收稿时间： | 2021-06-04 |
Leaching Kinetics of High-Calcium Low-Grade Copper Ore with Sulfuric Acid |
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| GAO Zhao-wei,CAO Cheng-chao,LI Yao-shan,KONG De-hong,TANG Da-cai,LIU Yuan,WANG Hua-tai. Leaching Kinetics of High-Calcium Low-Grade Copper Ore with Sulfuric Acid[J]. Mining and Metallurgical Engineering, 2021, 41(6): 170-173. DOI: 10.3969/j.issn.0253-6099.2021.06.041 |
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| Authors: | GAO Zhao-wei CAO Cheng-chao LI Yao-shan KONG De-hong TANG Da-cai LIU Yuan WANG Hua-tai |
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| Affiliation: | 1.Western Mining Group Technology Development Co Ltd, Xining 810000, Qinghai, China; 2.Key Laboratory of Plateau Mineral Processing Engineering and Comprehensive Utilization of Qinghai Province, Xining 810000, Qinghai, China; 3.Qinghai Provincial Engineering Technology Research Center for Non-ferrous Mineral Resources, Xining 810000, Qinghai, China; 4.Subei Mongolian Autonomous County West Mining Vanadium Technology Co Ltd, Jiuquan 736300, Gansu, China |
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| Abstract: | The leaching process of low-grade copper oxide ore was studied by performing single factor experiment and kinetic analysis, and the effects of particle size, leaching temperature, sulfuric acid concentration and liquid-solid ratio on the leaching process were investigated. It is found that the 120 min-leaching process at a temperature of 60 ℃, with the particle size of -0.074 mm 85%, the sulfuric acid concentration of 2.5 mol/L and liquid-solid ratio of 4∶1 can finally result in the copper leaching rate reaching 96.23%, and the presence of CaCO3 increases the consumption of sulfuric acid. The leaching kinetics follows the shrinking unreacted core model and the reaction rate is controlled by mass transfer and diffusion at the solid-film interface, showing the activation energy is 8.78 J/mol. |
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| Keywords: | copper ore sulfuric acid leaching kinetics |
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