| 难选高硅氧化锌矿碱浸出动力学 |
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| 引用本文： | 赵中伟,龙双,陈爱良,霍广生,李洪桂,贾希俊.难选高硅氧化锌矿碱浸出动力学[J].有色金属(冶炼部分),2009(6). |
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| 作者姓名： | 赵中伟 龙双 陈爱良 霍广生 李洪桂 贾希俊 |
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| 作者单位： | 中南大学冶金科学与工程学院,长沙,410083 |
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| 基金项目： | 国家重点基础研究发展计划支持项目(973)，教育部"新世纪优秀人才支持计划" |
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| 摘 要： | 研究了氢氧化钠处理难选高硅氧化锌矿的浸出动力学,考察了搅拌强度、浸出反应温度、氢氧化钠初始浓度对锌的浸出速率的影响。利用等浸出率法来确定其表观活化能和反应级数,得到表观活化能E=45.7 kJ/mol,属于化学反应控制;其反应级数K=1.4。实验结果表明,提高反应温度可显著提高锌的浸出率,而增大搅拌强度却对锌的浸出率基本无影响。
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| 关 键 词： | 高硅氧化锌矿 浸出 动力学 表观活化能 反应级数 |
Kinetics of the Refractory Hemimorphite Leached with Alkali |
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| ZHAO Zhong-wei,LONG Shuang,CHEN Ai-liang,HUO Guang-sheng,LI Hong-gui,JIA Xi-jun.Kinetics of the Refractory Hemimorphite Leached with Alkali[J].Nonferrous Metals(Extractive Metallurgy),2009(6). |
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| Authors: | ZHAO Zhong-wei LONG Shuang CHEN Ai-liang HUO Guang-sheng LI Hong-gui JIA Xi-jun |
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| Abstract: | The kinetics of leaching refractory hemimorphite with sodium hydroxide was studied.The stirred rapidity,leaching temperatures and the concentration of sodium hydroxide were researched.The apparent activation energy and reaction progressions were determined.The apparent activation energy was about 45.7 kJ/mol,and the leaching rate is controlled by the surface chemical reaction.The reaction progression is 1.4.The results indicated that enhancing the temperature may raise the leaching rate obviously.But the increase of stirring intensity had no obvious effect. |
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| Keywords: | Hemimorphite Leaching Kinetics Apparent activation energy Reaction progression |
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