稀盐酸中锰结核还原浸出溶液净化除铁
来源期刊：中国有色金属学报1997年第4期
论文作者：郭学益 张多默 刘志宏 葛荣德 陈慧光
文章页码：53 - 56
关键词：锰结核 黄钠铁矾 除铁
Key words：manganese nodule jarosite iron precipitation
摘 要：针对酸性氯化物中黄铁矿还原浸出锰结核的溶液成分特点，选择黄钠铁矾法进行了沉淀分离铁的研究。结果表明温度和晶种以及溶液pH值是影响铁矾沉淀的重要因素。在pH2.0左右，溶液温度高于90℃，足量晶种加入的情形下，150min后可将溶液中的铁含量降至0.1g/L。沉矾过程的表观活化能为94.66面kJ/mol。黄铁矿氧化生成的硫酸根随铁一同沉淀，从而消除了SO42-在氯化物体系中的积累。
Abstract: Jarosite process was selected for iron removal due to the characteristics of the solution originated from the reduction leaching of manganese nodules by pyrite in chloride system. The temperature, pH and crystal seeds were found to be critical for Fe precipitation as jarosite. The content of Fe in the solution could be decreased to 0.1g/L at pH around 2.0 and temperatrue above 90℃ for 150 min, with proper addition of seeds. The apparent activation energy for the jarosite formation was 94.66 kJ/mol, which indicated that the process was chemically controlled. The SO42- originated from the FeS2 oxidation in the leaching step precipitated with the irons, which eleminated the accumulations of SO42- in chloride solution.
