(1. 北京科技大学 土木与环境工程学院, 北京 100083;
2. 中国科学院 过程工程研究所, 北京 100080)
摘 要: 研究了大洋多金属锰结核酸浸贵液中铁锰元素与铜、 钴、 镍有价金属的分离。 根据溶液所含金属的特点， 选用可以回收利用的MnO2作为Fe2＋的氧化剂先将Fe2＋氧化为Fe3＋； 采用黄铵铁矾法与Fe(OH)3相结合的二步法除铁工艺， 并对溶液pH、 反应温度、 反应时间等操作参数进行优化， 铁的沉淀率达到99.8%， 净化后溶液中含铁量低于0.01 g/L， 钴、 铜、 镍、 锰的回收率分别达到99.5%、 93.3%、 99.6%、 99.3%； 硫化沉淀分离锰和铜、 钴、 镍过程中， 硫化钠适宜用量为理论用量的4.5倍， 适宜pH值4.5， 适宜温度80 ℃， 沉淀时间1 h， 铜、 钴、 镍的沉淀率在99%左右， 而锰的沉淀率仅为0.46%。
关键字: 大洋多金属结核; 溶液净化; 沉淀法
（ 1. School of Civil and Environment Engineering,
University of Science and Technology Beijing, Beijing 100083, China;
2. Institute of Process Engineering, Chinese Academy of Sciences,
Beijing 100080, China）
Abstract: The removal of iron and manganese element from the ocean multimetallic nodules acid leaching solution was discussed. For being recycled, MnO2 was choosed to oxygenate Fe2＋ to Fe3＋ firstly. The two steps method was used to remove iron element from the solution, which consists of jarosite and Fe(OH)3 method, and the operation parameters such as pH value, reacting temperature, reacting time were optimized. The sedimentation rate of iron can reach 99.8%, the content of iron in the purified solution is below 0.01 g/L. The recoveries of Co, Cu, Ni, Mn are 99.5%, 93.3%, 99.6%, 99.3% respectively. It is shown that the usage of Na2S is 4.5 times of theory usage, the suitable reacting parameters are pH 4.5, temperature 80 ℃, and reacting time 1 h. The sedimentation rates of Co, Cu and Ni are 99%, the sedimentation rate of Mn is only 0.46%.
Key words: ocean multimetallic nodules; solution purification; sedimentation
