THE DISSOLUTION OF CHALCOPYRITE IN FERRIC SULFATE AND FERRIC-CHLORIDE MEDIA
THE DISSOLUTION OF CHALCOPYRITE IN FERRIC SULFATE AND FERRIC-CHLORIDE MEDIA
复制标题
DOI：
10.1007/bf02654471
复制
发表时间：
1981-01-01
期刊：
影响因子：
--
通讯作者：
DUTRIZAC, JE
中科院分区：
文献类型：
--
作者：
DUTRIZAC, JE
对黄铜矿的铁离子浸出的文献进行了调查，以确定那些已经确立的浸出参数，并概述需要进一步研究的领域。为解决仍有争议的问题，进行了新的实验工作。似乎已经确定，黄铜矿在氯化铁或硫酸铁介质中的溶解不依赖于高于悬浮颗粒所需的搅拌速度和高于将铁保持在溶液中所需的酸浓度。在氯化物体系中，反应速率较快，活化能约为42 kJ/mol;在硫酸铁溶液中，活化能约为75 kJ/mol。已经证实，在氯化物和硫酸盐介质中，该速率与黄铜矿的表面积成正比。硫酸盐浓度，特别是FeSO 4浓度，大大降低浸出率;此外，CuSO 4不促进硫酸盐体系中的浸出。在高温下，向硫酸盐溶液中加入氯化物会略微加快溶解速率。实验结果表明，在硫酸铁体系中，浸出几乎与Fe ~（3+）浓度无关，ka[Fe ~（3+）]= 0.12。在氯化铁溶液中，铁浓度依赖性更大，并且在45至100 °C的区间内似乎与温度无关。
The literature on the ferric ion leaching of chalcopyrite has been surveyed to identify those leaching parameters which are well established and to outline areas requiring additional study. New experimental work was undertaken to resolve points still in dispute. It seems well established that chalcopyrite dissolution in either ferric chloride or ferric sulfate media is independent of stirring speeds above those necessary to suspend the particles and of acid concentrations above those required to keep iron in solution. The rates are faster in the chloride system and the activation energy in that medium is about 42 kJ/mol; the activation energy is about 75 kJ/mol in ferric sulfate solutions. It has been confirmed that the rate is directly proportional to the surface area of the chalcopyrite in both chloride and sulfate media. Sulfate concentrations, especially FeSO4concentrations, decrease the leaching rate substantially; furthermore, CuSO4does not promote leaching in the sulfate system. Chloride additions to sulfate solutions accelerate slightly the dissolution rates at elevated temperatures. It has been confirmed that leaching in the ferric sulfate system is nearly independent of the concentration of Fe3+, ka[Fe3+]0.12. In ferric chloride solutions, the ferric concentration dependence is greater and appears to be independent of temperature over the interval 45 to 100 °C.