酸性条件下ZnS氧化浸出过程动力学的研究
来源期刊：中南大学学报(自然科学版)1992年第1期
论文作者：邓日章 赵天从 钟竹前 梅光贵
文章页码：36 - 42
关键词：ZnS; 湿法冶金; 动力学; 氧化浸出
Key words：ZnS; hydrometallurgy; kinetics; oxidation leach
摘 要：本文研究了在盐酸溶液中使用二氧化锰作氧化剂氧化浸出ZnS矿过程的动力学,详细考察了温度、搅拌速度、精矿粒度、HCl浓度、FeCl3浓度和MnO2量等因素对锌浸出速率的影 响。结果指出:浸出过程反应活化能为54.76kJ/mol;HCl和FeCl3在一定的浓度范围内对锌浸出速率均有影响。浸出过程符合内扩散控制模型,其中反应物H+(或含H+复合离子)和反应产物Fe2+,Zn2+等通过产物硫膜层的传输为整个过程的控制步骤。
Abstract: This paper deals with the kinetics of oxidative dissolution of sphalerite bymanganese dioxide in aqueous hydrochloric acid solutions.The influence of suchfactors as emperature,stirring speeds,particle size of sphalerite,HCl concen-tration,FeCl3 concentration nd quantities of MnO2,etc,on the dlissolutionrates of sphalerite has been investigated.The esults indicate that the activationenergy of the dissolution reaction of sphaierite is 54.76 J/mol which is reaso-nable for a rate limiting diffusion of the reaction products of Fe2,Zn2+ andthe reaction agents of H+(or its complex ions)through the reaction productcelemental sulphur)layer,and the concentrations of HCl and FeCl3 in theirsolutions in ertain range affect the dissolution rates of sphalerite.
