用测定电势的方法来控制氨浸过程

• 机 构: 北京矿冶研究院冶金室,青海钢铁厂试验组
• 出 处: 有色金属(冶炼部分)
• 发表日期: 1974年09期
• 关键词: 浸出过程 氨浸 红土矿 焙砂 饱和甘汞电极 小型试验 离子浓度 碳酸铵 镍铁合金 氨溶液

我们在研究国内某红土矿的处理方法时采用了还原焙烧-常压氨浸流程。在用碳酸铵-氢氧化铵浸出还原后的焙砂时,用Pt-饱和甘汞电极测定浸出过程电势的变化,以此来控制浸出速度及指示浸出的完成。但是,对于浸出过程电势变化的本质及解析电势变化曲线过去一直不太清楚。本文在小型试验的基础上,试图从电化学和物理化学的观点来探讨这个问题。

We are studying the treatment of a laterite ore using a reduction roasting - atmospheric ammonia leaching process. The Pt-saturated calomel electrode was used to measure the change in potential of the leaching process when the reduced calcine was leached with ammonium carbonate-ammonium hydroxide to control leaching rate and indicate completion of leaching. However, the nature of the potential change in the leaching process and the analysis of the potential curve have not been clear in the past. This article attempts to explore this issue from the viewpoint of electrochemistry and physicochemistry on the basis of small experiments.