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以浸出速率、浸出反应、化学计量和试样静电位测定的实验结果为根据,从热力学和动力学方面研究了用氧化、还原浸出法水冶处理锰结核和硫化镍混合矿的可行性。实验结果摘要如下:1.由NiS和MnO_2混合矿浸出时,NiS的氧化浸出率和MnO_2的还原浸出率随盐酸浓度和溶液温度的增加而增加。但是,浸出率与溶液的搅拌速度无关。从NiS和MnO_2混合物中浸出的镍和锰离子,随NiS/MnO_2克分子比的增大而增加;2.锰结核和Ni_3S_2混合物中的锰结核还原浸出率较NiS和锰结核混合物大;3.硫化镍氧化浸出反应是同时形成硫酸盐离子和元素硫的一种反应;4.从热力学考查和试验研究得出结论:氧化-还原浸出法是适用于处理锰结核的水冶新工艺。
Based on the experimental results of leaching rate, leaching reaction, stoichiometry and electrostatic potential measurement, the feasibility of water treatment treatment of manganese nodule and nickel sulfide mixed ore by oxidation and reduction leaching method was studied from thermodynamics and kinetics. The experimental results are summarized as follows: 1. When NiS and MnO 2 mixed ore are leached, the leaching rate of NiS and the reduction leaching rate of MnO 2 increase with the increase of hydrochloric acid concentration and solution temperature. However, the leaching rate has nothing to do with the stirring speed of the solution. The Ni and Mn ions leached from the mixture of NiS and MnO 2 increased with the molar ratio of NiS / MnO 2. 2. The reduction and leaching rates of manganese nodules in the mixtures of manganese nodules and Ni 3 S 2 were larger than those of NiS and manganese nodules.3. Nickel sulfide leaching reaction is the formation of sulfate ions and elemental sulfur simultaneously; 4. From the thermodynamic and experimental studies concluded: oxidation-reduction leaching method is suitable for the treatment of manganese nodules new process of watermelting.