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投稿时间：2021-02-05 修订日期：2021-02-09
投稿时间：2021-02-05 修订日期：2021-02-09
中文摘要: 硝酸作为浸出剂可以循环再生,文章研究了酸浓度、固液比、搅拌转速、浸出时间、浸出温度在常压条件下对红土镍矿中Ni、Co、Fe和Mg四种元素的浸出影响,求解了镍的浸出动力学。结果表明：在酸浓度为300g/L、固液比为1：12g/mL、搅拌转速为250rpm、浸出时间为150min、浸出温度为85℃的条件下,Ni、Co、Fe和Mg的浸出率分别为98.75%、91.66%、81.45%、94.21%。镍的浸出过程符合收缩核模型,反应活化能为38.804kJ/mol,反应过程受化学反应和内扩散混合控制。
Abstract:Nitric acid can be recycled as a leaching agent. The article studies the influence of acid concentration, solid-liquid ratio, stirring speed, leaching time, leaching temperature on the leaching of four elements of Ni、Co、Fe and Mg from laterite nickel ore under normal pressure. Solve the leaching kinetics of nickel. The results showed that: under the conditions of acid concentration of 300g/L, solid-liquid ratio of 1:12g/mL, stirring speed of 250rpm, leaching time of 150min, and leaching temperature of 85℃, Ni, Co, Fe, and Mg. The leaching rates of sulphate were 98.75%, 91.66%, 81.45%, 94.21%. The leaching process of nickel conforms to the shrinking nucleus model, the reaction activation energy is 38.804kJ/mol, and the reaction process is controlled by chemical reaction and internal diffusion mixing.
文章编号：20210205001 中图分类号： 文献标志码：
基金项目:清远市科技计划项目(清科函[2019]126号 300)；广东省重点实验室专项(2020年粤财科教[2020]50号)
引用文本：
黄诗汉,吴 浩,郑江峰,文定强,张 颖,何玉娴.硝酸常压浸出红土镍矿特性及镍浸出动力学[J].矿冶,2021,30(5):.
黄诗汉,吴 浩,郑江峰,文定强,张 颖,何玉娴.硝酸常压浸出红土镍矿特性及镍浸出动力学[J].矿冶,2021,30(5):.
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