摘要
硫酸锰矿液存在低浓度钙离子难分离的问题,不利于硫酸锰矿液的进一步利用。本研究对比了氟化法和氨化法分离硫酸锰矿液中钙的效果,并详细探究了氟化铵用量、pH值调节剂、碳酸铵沉淀剂用量、反应温度以及pH值对钙分离效果及锰离子损失的影响。实验表明,氟化法分离钙的较佳条件为:使用氨水调节pH值到4.5,氟化铵与锰的用量比为3∶1、碳酸铵与锰的用量为3∶4、反应温度为90℃。氨化法分离钙的较佳pH值为9.5。值得注意的是,两种方法不仅能分离低浓度的钙,也能使镁的分离率高于90.0%。对比氟化法,氨化法可使钙的分离率达到83.3%,且能将锰离子损失量降到较低。此外,将氨化法分离钙镁后所得的硫酸锰溶液中的锰离子进行进一步利用,成功制备出了高纯的碳酸锰。
The problem of difficult separation of low concentration calcium ions in manganese sulfate ore solution is not conducive to its further utilization.This study compared the effects of fluorination and ammonification methods on the separation of calcium from sulfuric acid manganese ore solution,and investigated in detail the effects of ammonium fluoride dosage,pH value regulator,ammonium carbonate precipitant dosage,reaction temperature,and pH value value on calcium separation efficiency and manganese ion loss.Experiments have shown that the optimal conditions for separating calcium by fluorination are:adjusting the pH value to 4.5 using ammonia water,a ratio of 3:1 between ammonium fluoride and manganese,a ratio of 3:4 between ammonium carbonate and manganese,and a reaction temperature of 90℃.The optimal pH value for separating calcium by ammonification method is 9.5.It is worth noting that both methods can not only separate low concentrations of calcium,but also achieve a separation rate of over 90%for magnesium.Compared to the fluorination method,the ammonification method can achieve a calcium separation rate of 83.3%and minimize the loss of manganese ions.In addition,high-purity manganese carbonate was successfully prepared by further utilizing the manganese ions in the manganese sulfate solution obtained by the ammonification method for separating calcium and magnesium.
作者
何思雨
黄瑞翔
王旭倩
陈飞宇
付义凡
张永奎
HE Siyu;HUANG Ruixiang;WANG Xuqian;CHEN Feiyu;FU Yifan;ZHANG Yongkui(College of Chemical Engineering,Sichuan University,Chengdu,Sichuan 610065,China;Sichuan Zhongzhe New Material Technology Co.,Ltd.,Guangyuan,Sichuan 628115,China)
出处
《矿产综合利用》
2025年第4期143-148,共6页
Multipurpose Utilization of Mineral Resources
关键词
冶金工程
低品位锰矿
资源利用
分离
低浓度钙
碳酸锰
metallurgical engineering
low-grade manganese ore
resource utilization
separation
low concentration calcium
manganese carbonate
