摘要
以人工合成的高纯度铁闪锌矿为研究对象,基于对388K温度条件下浸出过程物相及矿物表面性质变化的分析,研究锌、硫、铁等元素的低温加压浸出行为。结果表明,元素锌仅发生溶解反应而且溶解锌能稳定存在于水溶液中;浸出初期,铁闪锌矿电化学氧化反应滞后,而铁闪锌矿酸溶反应才是浸出初期最主要的化学反应,浸出初期无SO42-氧化生成,但在浸出后期,可能有少量单质硫进一步氧化生成SO42-。单质硫是铁闪锌矿最主要的氧化产物;浸出过程中,铁溶出与溶解铁的水解沉淀反应是同步进行的。在浸出初期,铁的溶出占主导地位,而在浸出后期,溶解铁的水解沉淀则是主要反应而且铁的沉淀形态可以调控。
The low-temperature pressure leaching of synthesized marmatite was studied. The leaching behavior of zinc, sulfur and iron was discussed based on the analysis of the phase change and the mineral surface properties at 388 K. The results indicate that only the dissolving reaction takes place for zinc and the dissolved zinc can exist in the solution stably. The acidic dissolving of marmatite, other than the electrochemical oxidation is the main chemical reaction in the initial leaching. No sulfate ion is produced in the initial leaching while a small quantity of elemental sulfur is further oxidized into sulfate in the terminal leaching. Elemental sulfur is the main oxidization product of marmatite. The dissolving and hydrolysis precipitation of iron occur simultaneously in the leaching. In term of iron, the dissolving is the main reaction in the initial leaching while the hydrolysis precipitation is predominant in the terminal leaching and the form of precipitates can be controlled.
出处
《有色金属（冶炼部分）》
CAS
北大核心
2012年第7期6-11,共6页
Nonferrous Metals（Extractive Metallurgy)
基金
国家自然科学基金资助项目(50964004)
江西省第四批青年科学家培养对象资助项目(赣科发计字[2010]209号)
关键词
铁闪锌矿
低温加压浸出
锌
硫
铁
浸出行为
marmatite
low-temperature pressure leaching
zinc
sulfur
iron
leaching behavior
