硫酸镁在氯化物溶液中的结晶平衡  

Crystalline Equilibrium of Magnesium Sulfate in Chloride Solutions

作　　者：王恒 丁伟中[1] 谈定生[1] 

机构地区：[1]省部共建高品质特殊钢冶金与制备国家重点实验室上海市钢铁冶金新技术开发应用重点实验室上海大学材料科学与工程学院,上海200072

出　　处：《湿法冶金》2017年第1期46-49,共4页Hydrometallurgy of China

基　　金：国家重点基础研究发展计划(973计划)项目(2012CB722805)

摘　　要：研究了氯化物溶液体系中不同条件下与硫酸镁晶相平衡的Mg2+浓度的变化规律。试验结果表明:在75℃条件下形成硫酸镁结晶并达到平衡时,溶液中Mg2+浓度随H+、Fe3+浓度升高和SO2-4在阴离子中占比增大而降低;Fe3+浓度超过0.5mol/kg时,平衡固相为MgSO_4·H_2O和FeH(SO_4)_2·4H_2O的混合物;Fe^(3+)低于0.5mol/kg时,平衡固相为MgSO_4·H_2O。The changing rule of magnesium ions concentration equilibrating with crystal magnesium sulfate in chloride solution systems at different conditions was studied. The results show that the Mg2＋ concentration decreases with increasing of H＋ ,Fe3＋ concentration and the certain proportion of SO4 2- in the total anion at 75℃. The crystalline products are the mixture of MgSO4 · H2O and Fell （SO4）2 · 4H2O when the Fe3＋ concentration is over 0. 5 mol/kg. At the conditions of Fea＋ concentration less than 0.5 mol/kg,however ,the equilibrium solid phase is pure MgSO4 · H2O.

关 键 词：氯化物溶液 硫酸镁 结晶 镁离子 铁离子 

分 类 号：TF815[冶金工程—有色金属冶金]