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NH3.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,向硫酸锰溶液加入碳酸氨溶液,缓慢搅拌,即有碳酸锰沉淀析出。
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 H2O2 as oxidization reagent to oxidize Fe^2＋ to Fe^3＋ , Using NH3 · H2O and BaS to deposit Fe^3＋ , Ca^2＋ , Mg^2＋ and other heavy metal ion. So got pure MnSO4 solution. Adjusted the concentration of MnSO4 solution and the temperature of the solution, Adjusted pH using NH3 · H2O, Added （NH4）2CO3 solution to MnSO4 solution stirred slowly, then, got MnCO3 sedimentation. After filtration, dryed at 70-80℃, then got the product MnCO3. By means of orthogonal experiments, got optimal carbonization conditions： （NH4）2 CO3 （mol） ： MnSO4 （mol） = 1.5 ： 1, the concentration of （NH4）2CO3 solution and MnSO4 solution are 2 mol/L and 0.4 mol/L, the pH is 5.5, the temperature of carbonization is 75℃. The MnCO3 prepared accords with GB10503-89.
出处
《中国矿业》
北大核心
2007年第2期90-92,共3页
China Mining Magazine
关键词
富锰渣
酸浸
硫酸锰
碳酸铵
碳酸锰
Rich-Manganese slags Lixiviate Manganese sulfate Ammonium carbonate Manganese carbonate
