文献类型：期刊文献

英文题名：Equilibrium distribution of Mg in manganese electrolysis system

作者：Qin, Ji-Tao Wang, Jia-Wei Wang, Hai-Feng Zhao, Ping-Yuan Lu, Fang-Hai

第一作者：Qin, Ji-Tao

通信作者：Wang, JW[1];Wang, JW[2];Wang, JW[3]

机构：[1]Guizhou Univ, Coll Mat & Met, Guiyang 550025, Guizhou, Peoples R China;[2]Engn Technol & Res Ctr Manganese Mat Battery, Tongren 554300, Guizhou, Peoples R China;[3]Guizhou Prov Key Lab Met Engn & Energy Saving, Guiyang 550025, Guizhou, Peoples R China;[4]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, Guizhou, Peoples R China

第一机构：Guizhou Univ, Coll Mat & Met, Guiyang 550025, Guizhou, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Mat & Met, Guiyang 550025, Guizhou, Peoples R China;corresponding author), Engn Technol & Res Ctr Manganese Mat Battery, Tongren 554300, Guizhou, Peoples R China;corresponding author), Guizhou Prov Key Lab Met Engn & Energy Saving, Guiyang 550025, Guizhou, Peoples R China.

年份：2019

卷号：6

期号：9

外文期刊名：MATERIALS RESEARCH EXPRESS

收录：;EI(收录号：20193307322205);Scopus(收录号：2-s2.0-85070625638);WOS:【SCI-EXPANDED(收录号:WOS:000478687100003)】；

基金：The fund supports were from the National Natural Science Foundation of China (51764006, 51864012 and 51664010). Science and Technology Project of Guizhou Province([2017] 5788, [2018] 5071, [2019] 1411).

语种：英文

外文关键词：(NH4)(2)SO4-MgSO4 crystallization; pollution; electrolytic manganese; magnesium; equilibrium distribution

摘要：Aiming at the common problems of magnesium ion concentration being higher than manganese ion concentration in the electrolytic manganese industry, the equilibrium distribution of Mg in manganese electrolysis system was studied. It mainly included four main steps: the rhodochrosite was leached under acidic conditions, the Fe2+ was removed by precipitation after MnO2 oxidation, the heavy metals ware removed by SDD. Finally, the manganese metal was produced in the cathode by electrolysis of manganese sulfate solution. The morphology and phase composition of magnesium in the whole system were obtained by SEM and XRD. Under leaching conditions for industrial production, the temperature was 85 degrees C, liquid-solid ratio was 8:1, the excess coefficient of acid was 1.3, and the reaction time was 3 h, leaching rate of Mg was 38.19%, and the corresponding concentration of Mg2+ was 2.96 gl(-1) in the solution. The effect of Mg2+ concentration on manganese leaching rate was done, the result showed that the leaching rate of manganese decreased with the increasing of magnesium ion. When the Mg2+ was increased from 0% to 50%, the leaching rate of manganese decreased from 83.12% to 76.39%. At pH 5.5 and 85 degrees C, Fe2+ could be completely removed by using MnO2 as oxidant and 22.44% magnesium would be taken away with iron slag. The removing of heavy metals could be achieved under the condition of 60 +/- 5 degrees C, SDD dosage 3%o (according solution quantity) and 1 h, 0.4% magnesium would be taken away with heavy metal slag. The electrolysis experiments were carried out under the conditions, (NH4)(2)SO4 content was 100 gl(-1), pH was 7.2, reaction temperature was 45 degrees C and current density was 350 A m(-2). The results showed that 88.18% of magnesium was distributed in the anode solution and 11.4% in the cathode solution, and there was 0.08% and 0.34% of magnesium in the cathode manganese sheet and the anode slag, respectively.