以富锰渣为原料制备碳酸锰.pdf

维普讯htp:www.covipcon
第16卷第2期
中
矿业
Vol 16. No. 2
2007年2月
CHINA MINING MAGAZINE
February 2007
以富锰渣为原料制备碳酸錳
原金海2谭世语贾云1龙度辉
(1,重庆科技学院化学与生物学院?重庆40050;2.重庆大学资源与
环境科学学院?重庆400044;3.重庆大学化学化工学院?重庆400044)
摘要:以98%的浓硫酸为浸取介质,浓硫酸(ml):富锰渣(g)=0.57:1,不加热,强搅拌下
反应三个小时,将富锰渣中锰、铁、钙、镁等可溶性物质溶出,锰的浸出率可达97.85%,过滤,洗涤
以MnO2为氧化剂将Fe2+氧化为Fe3+,以NIH3?H2O和BaS为联合除杂剂以除去铁、钙、镁及其它重
金属离子,得到纯度较高的硫酸锰溶液,调节硫酸锰溶液浓度及温度,以NH3?H2O调节溶液pH值
向硫酸锰溶液加人碳酸氨溶液,缓慢搅拌,即有碳酸锰沉淀析出。
通过正交实验得到如下最佳的碳化条件:碳酸铵与硫酸锰的摩尔比为1.5:1;碳酸铵的浓度为
mol/L;硫酸锰浓度为0.4mol/Ls;碳化时,pH值调节为5.5;温度为75C。将以上得到的较纯净的硫
酸锰溶液,在此条件下可制得碳酸锰沉淀,过滤,于70~80℃下于燥得到产品,该产品符合GB10503
关键词:富锰渣酸浸硫酸锰碳酸铵碳酸锰
中图分类号:TF111,51文就标识码:A文章编号:1004-4051(2007)02-0090一03
PREPARING MNCO3 FROM RICH-MANGANESE SLAGS
Yuan Jinhail,2 Tan Shiyu'jia Yi
ong r a
1. The Department of Chemistry & Biology Engineering, Chong Qing University of
Science & Technology. Chong Qing 400050; 2. The College of R
esource an
Environment Science, Chong Qing University.Chong Qing 400045;
3. The College of Chemistry and Chemical Engineering
Chong Qing University. Chong Qing 400045)
Abstract: Lixiviated rich-manganese slags Using sulfate acid (98%), under the conditions: sulfate
acid (ml rich-manganese slags(g)=0.57 1, no heat, strong stired, reacted for 3 hours, dissolved
out Mn, Fe, Ca, Mg, etc. and 97.85% of manganese was transferred to solution. Using H2O as oxi
dization reagent to oxidize Fe*to Fe., Using NH; H2O and Bas to deposit Fe, Ca, Mgand
other heavy metal ion. So got pure Mnso, solution, Adjusted the concentration of Mnso solution and the
temperature of the solution, Adj usted PH using NH;. H:O, Added (NH,)a C(
3 solution to
tion stirred slowly, then, got Mnco, sedimentation After filtration, dryed at 70-80C, then got the
product Mnco.
By means of orthogonal experiments, got optimal carbonization conditions: (NH, )2CO; (mol) Mn
SO (mol) =1. 5: 1, the concentration of(NH,) CO solution and Mnso solution are 2 mol/L and 0. 4
mol/L, the PH is 5.5, the temperature of carbonization is 75C. The Mnco prepared accords with
GB10503-89.
Gers_ Key words: Rich-manganese slags Lixiviate Manganese sulfate Ammonium carbonate
anganese
目前,碳酸锰的生产方法有:①以菱锰矿为原料,采用无机酸浸取,获取相应的锰盐溶液,锰盐
与碳酸盐沉淀剂再进行复分解反应制备MnCO。
收稿日期:2006-09-1
②锰盐溶液通人CO2和NH3制备MnCO。(3)用
作者简介:原金海(1978-)男讲师重庆大学资源与环境科贫锰矿湿法直接生产高纯度碳酸锰。本文以富锰渣
学学院在读博士