| 高碱性脉石低品位氧化锌矿低浓度氨浸动力学研究 |
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| 引用本文： | 王念卫,王成彦,尹飞,陈永强.高碱性脉石低品位氧化锌矿低浓度氨浸动力学研究[J].矿冶,2010,19(1):36-39. |
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| 作者姓名： | 王念卫 王成彦 尹飞 陈永强 |
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| 作者单位： | 北京矿冶研究总院,北京,100044 |
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| 基金项目： | 国家重点基础研究计划(课题编号2007CB613505) |
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| 摘 要： | 对高碱性脉石低品位氧化锌矿氨浸动力学进行了研究。结果表明,氧化锌矿氨浸遵循"未反应核缩减"模型,动力学方程遵从1-2a/3-(1-a)2/3=kt,其表观活化能25.84kJ/mol,浸出过程属于固体膜层扩散控制。提高浸出液的浓度、温度,均可加速锌的浸出速度,提高浸出率。
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| 关 键 词： | 低品位氧化锌矿 氨 浸出动力学 |
STUDY ON KINETICS OF LOW CONCENTRATION AMMONIA LEACHING ON LOW-GRADE ZINC OXIDE ORE WITH HIGH ALKALITY GANGUES |
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| WANG Nian-wei,WANG Cheng-yan,YIN Fei,CHEN Yong-qiang.STUDY ON KINETICS OF LOW CONCENTRATION AMMONIA LEACHING ON LOW-GRADE ZINC OXIDE ORE WITH HIGH ALKALITY GANGUES[J].Mining & Metallurgy,2010,19(1):36-39. |
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| Authors: | WANG Nian-wei WANG Cheng-yan YIN Fei CHEN Yong-qiang |
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| Affiliation: | Beijing General Research Institute of Mining & Metallurgy;Beijing 100044;China |
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| Abstract: | Based on low grade zinc oxide ore,the kinetics of low concentration ammonia leaching is studied.The results shows that the ammonia leaching of zinc oxide follows an unreacted shrinking core model,which conforms to the kinetic equation: 1-2a/3-(1-a)2/3=kt,the apparent activation energy of the leaching reaction is 25.84kJ/mol,and the leaching process is controlled by diffusion procedures.Thus the leaching rate and recovery can be improved by increasing the concentration and temperature of lixiviant. |
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| Keywords: | low grade zinc oxide ammonia leaching kinetics |
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