(1. 北京科技大學(xué) 土木與環(huán)境工程學(xué)院, 北京 100083;
2. 中國科學(xué)院 過程工程研究所, 北京 100080)
摘 要: 研究了大洋多金屬錳結(jié)核酸浸貴液中鐵錳元素與銅、 鈷、 鎳有價金屬的分離。 根據(jù)溶液所含金屬的特點， 選用可以回收利用的MnO2作為Fe2＋的氧化劑先將Fe2＋氧化為Fe3＋； 采用黃銨鐵礬法與Fe(OH)3相結(jié)合的二步法除鐵工藝， 并對溶液pH、 反應(yīng)溫度、 反應(yīng)時間等操作參數(shù)進行優(yōu)化， 鐵的沉淀率達到99.8%， 凈化后溶液中含鐵量低于0.01 g/L， 鈷、 銅、 鎳、 錳的回收率分別達到99.5%、 93.3%、 99.6%、 99.3%； 硫化沉淀分離錳和銅、 鈷、 鎳過程中， 硫化鈉適宜用量為理論用量的4.5倍， 適宜pH值4.5， 適宜溫度80 ℃， 沉淀時間1 h， 銅、 鈷、 鎳的沉淀率在99%左右， 而錳的沉淀率僅為0.46%。
關(guān)鍵字: 大洋多金屬結(jié)核; 溶液凈化; 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
