(中南工業(yè)大學(xué)有色冶金系， 長沙 410083)
摘 要: 針對(duì)酸性氯化物中黃鐵礦還原浸出錳結(jié)核的溶液成分特點(diǎn)，選擇黃鈉鐵礬法進(jìn)行了沉淀分離鐵的研究。結(jié)果表明溫度和晶種以及溶液pH值是影響鐵礬沉淀的重要因素。在pH2.0左右，溶液溫度高于90℃，足量晶種加入的情形下，150min后可將溶液中的鐵含量降至0.1g/L。沉礬過程的表觀活化能為94.66面kJ/mol。黃鐵礦氧化生成的硫酸根隨鐵一同沉淀，從而消除了SO42-在氯化物體系中的積累。
關(guān)鍵字: 錳結(jié)核 黃鈉鐵礬 除鐵
（Department of Nonferrous Metallurgy,
Central South University of Technology, Changsha 410083）
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.
Key words: manganese nodule jarosite iron precipitation
