硫氧混合鉛鋅礦中鋅的氧化氨浸動力學

賈楠楠; 王會剛; 郭敏; 張梅

doi:10.13374/j.issn2095-9389.2017.03.009

硫氧混合鉛鋅礦中鋅的氧化氨浸動力學

doi: 10.13374/j.issn2095-9389.2017.03.009

北京科技大學冶金與生態工程學院, 北京 100083

基金項目:

國家重點基礎研究發展規劃資助項目（2014CB643401，2013AA032003）；國家自然科學基金資助項目（51372019）

詳細信息

中圖分類號: TF813
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出版歷程
- 收稿日期: 2016-05-31

Oxidative ammonia leaching kinetics of zinc extracted from mixed sulfide-oxide lead and zinc ore

School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 常壓低溫條件下在NH₃-（NH₄）₂SO₄體系中使用過硫酸銨作為氧化劑對硫氧混合鉛鋅礦中的鋅進行浸出實驗，系統研究了攪拌速度、浸出劑濃度、氧化劑濃度與溫度對于鋅浸出率的影響.結果表明，在最優條件下鋅的浸出率可達93.2%，且浸出過程中幾乎沒有其他離子進入溶液，實現了鋅的選擇性高效浸出，從而簡化了后續的浸出液凈化與材料制備過程.動力學研究表明，硫氧混合鉛鋅礦中鋅的氧化氨浸過程遵循固體產物層擴散控制的未反應核收縮模型，浸出反應的表觀活化能為17.89 kJ·mol^-1.
- 鉛鋅礦處理 /
- 過硫酸銨 /
- 浸出動力學 /
- 選擇性
Abstract: The leaching experiments of zinc from mixed sulfide-oxide lead and zinc ore were performed in NH₃-(NH₄)₂SO₄ solution with ammonium persulfate as an oxidant under atmospheric pressure and relatively low temperature. The effects of stirring speed, lixiviants, oxidant concentration and reaction temperature on the leaching rate of zinc were studied. The results show that under the optimal conditions, the leaching rate of zinc can reach 93. 2%, and nearly no other metal ions enter into lixivium during the leaching process, which shows that this ammoniacal leaching system has a high efficiency and selectivity. This is significant to simplify the following purification process and product preparation process. Leaching kinetics indicates that the oxidative leaching of zinc could be represented by a shrinking core model with product layer diffusion and the activation energy for the dissolution reaction is calculated as 17. 89 kJ·mol^-1.
- lead zinc ore treatment /
- ammonium persulfate /
- leaching kinetics /
- selectivity

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參考文獻(13)

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