无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (4): 65-71.doi: 10.19964/j.issn.1006-4990.2022-0374

• 研究与开发 • 上一篇    下一篇

复盐结晶法对除菱锰矿浸出液中镁分配规律研究

王松1,2(), 王家伟1,2(), 勾碧波1,2, 杨攀1,2, 贺跃1,2, 杨春元1,2, 王海峰1,2   

  1. 1.贵州大学材料与冶金学院,贵州 贵阳 550025
    2.贵州省冶金工程与过程节能重点实验室,贵州 贵阳 550025
  • 收稿日期:2022-06-20 出版日期:2023-04-10 发布日期:2023-04-13
  • 通讯作者: 王家伟,男,教授,硕士生导师,主要研究固废资源综合利用及硫酸锰溶液深度净化除杂;E-mail:67749951@qq.com
  • 作者简介:王松(1997— ),男,硕士研究生,研究方向为硫酸锰溶液深度净化除杂及锰氧化物制备;E-mail:475761730@qq.com

Study on distribution law of magnesium in leaching solution of rhodochrosite by complex salt crystallization method

WANG Song1,2(), WANG Jiawei1,2(), GOU Bibo1,2, YANG Pan1,2, HE Yue1,2, YANG Chunyuan1,2, WANG Haifeng1,2   

  1. 1. College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China
    2. Guizhou Provincial Key Laboratory of Metallurgical Engineering and Energy Saving,Guiyang 550025,China
  • Received:2022-06-20 Published:2023-04-10 Online:2023-04-13

摘要:

电解锰生产系统中Mg2+循环累积已成为该行业的共性技术难题,研发经济实用的除镁方法,符合双碳目标背景下的技术发展方向。研究了一种复盐结晶法来控制电解锰系统中Mg2+浓度。在硫酸锰溶液中加入Al2(SO43·18H2O生成无定形态氢氧化铝,利用无定形态氢氧化铝的特殊性质,结合传统的复盐结晶技术,将硫酸锰溶液中Mg2+的质量浓度控制在20 g/L以下,并获得有一定附加值的锰镁铝氧化物的前驱体。利用XRD、EDS、ICP-MS等检测手段,通过单因素和正交实验得到以下结论:当以铝镁物质的量比为0.3加入铝盐、反应温度为80 ℃、反应pH为6、反应时间为1 h时,Mg2+分配系数为0.43、Mn2+损失率为31.51%,溶液中Mg2+质量浓度为17.525 g/L、Al3+质量浓度为0.205×10-3 g/L,达到预期目标,可保证电解锰生产系统的健康运行。

关键词: 复盐结晶法, 硫酸锰电解液, 硫酸铵镁, 分配系数

Abstract:

The cyclic accumulation of Mg2+ in electrolytic manganese production system has become a common technical problem in the industry.Developing economical and practical magnesium removal method is in line with the technical development direction under the background of dual-carbon target.A complex salt crystallization method was studied to control the concentration of Mg2+ in electrolytic manganese system.Al2(SO43∙18H2O was added into the manganese sulfate solution to generate amorphous Al(OH)3.Based on the special properties of amorphous Al(OH)3 and the traditional double salt crystallization technology,the concentration of Mg2+ in the manganese sulfate solution was controlled below 20 g/L.And the precursor of Mn-Mg-Al oxide with certain added value was obtained.By means of XRD,EDS and ICP-MS,the following conclusions were obtained by single factor and orthogonal experiment:when aluminum salt was added with aluminum magnesium molar ratio of 0.3,the reaction temperature was 80 ℃,the reaction pH was 6 and the reaction time was 1 h,the Mg2+ distribution coefficient was 0.43,the Mn2+ loss rate was 31.51%,the Mg2+ concentration in the solution was 17.525 g/L,and the Al3+ concentration was 0.205×10-3 g/L,which reached the expected goal and ensured the healthy operation of the electrolytic manganese production system.

Key words: complex salt crystallization, MnSO4 electrolyte, magnesium ammonium sulfate, distribution coefficient

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