铁闪锌矿加压浸出动力学-有色金属（冶炼部分）-北京矿冶研究总院.DOC

铁闪锌矿低温加压浸出过程中锌、硫、铁的行为 徐志峰1，江庆政1，王成彦2 （1. 江西理工大学 冶金与化学工程学院，江西赣州 341000；2. 北京矿冶研究总院，北京 100070） 摘要：以人工合成的高纯度铁闪锌矿为研究对象，基于对388 K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。 关键词：铁闪锌矿；低温加压浸出；锌；硫；铁；浸出行为 中图分类号：TF813；TF111.31 文献标识码：A 文章编号：1007-7545（2012）07-0000-00 Behavior of Zinc, Sulfur and Iron in Low-temperature Pressure Leaching Process of Marmatite XU Zhi-feng1, JIANG Qing-zheng1, WANG Cheng-yan2 (1. School of Metallurgical and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China; 2. Beijing General Research Institute of Mining and Metallurgy, Beijing 100070, China) Abstract: 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. Key words: marmatite; low-temperature pressure leaching; zinc; sulfur; iron; leaching behavior 我国锌资源中以铁闪锌矿形式赋存的锌储量占了很大比例。铁闪锌矿中的铁是以类质同相形式混入闪锌矿晶格，铁含量最高可以达到26%，采用机械磨矿及选矿的