半氧化锰矿的直接还原浸出工艺研究

Direct reductive leaching of manganese from semi-oxidized manganese ore

为探究在硫酸存在下以废糖蜜为还原剂浸取半氧化锰矿中锰的工艺条件,通过单因素实验,考察了废糖蜜初始浓度、硫酸浓度、反应时间和反应温度对浸出过程的影响,并采用响应面法分析废糖蜜初始浓度、硫酸浓度和反应时间对Mn浸出率的影响。结果表明,Mn浸出的最佳条件为:硫酸浓度2.82 mol/L,废糖蜜初始浓度27 g/L,反应时间132 min,反应温度90℃。在此条件下Mn浸出率可达到92%以上。

The technological conditions of manganese leaching from semi-oxidized manganese ore by using sugar cane molasses as reductant in sulfuric acid were studied. Single-factor experiments were employed to examine the influences of sugar cane molasses initial concentration, sulfuric acid concentration, reaction time and leaching temperature in the leaching process, and the effects of cane molasses initial concentration, sulfuric acid concentration and reaction time on the leaching rate of Mn were investigated by using the response surface methodology. The results indicated that the optimal conditions of Mn leaching were confirmed as H2SO4 concentration at 2. 82 mol/L, cane molasses initial concentration at 27 g/L, reaction time in 132 min and leaching temperature at 90℃. The leaching rate of Mn was more than 92% under such condition.