康密劳氧化锰小粒子矿还原焙烧及浸出实验研究

An Experimental Study on Comilog Manganese Oxide Ore Reduction Roasting and Small Particles Leaching

通过还原剂配比、焙烧温度、焙烧时间的条件实验,得出最佳还原剂配比为10%,焙烧温度为900℃,焙烧时间为60 min,Mn^(4+)的转化率可达99%以上。还原焙烧矿粉在酸矿比为0.94、浸出时间为60 min的浸出条件下,Mn^(4+)的浸出率达97%以上。经过添加氨水和SDD除杂后,得到合格电解锰溶液。对比采用大新碳酸锰矿,采用还原焙烧康密劳氧化锰矿进行制备电解锰溶液,矿耗少,酸耗低,氨耗低,成本比较低。证明了采用康密劳氧化锰矿进行还原焙烧制备电解锰溶液的可行性。

By reducing the ratio, calcination temperature and calcination time of experimental conditions, we have got optimum ratio of 10% with calcination temperature of 900 ℃ , roasting time is 60 min, Mn4＋ conversion rate of 99% . Reductive roasting ore in acid mine is 0. 94 with leaching time 60 min under leaching conditions and Mn4＋ leaching rate of 91%. After adding ammonia and SDD cleaning, we will get qualified EMM solution. Compared with Daxin manganese carbonate to use Comilog reduction in roasting of manganese oxide solution prepared manganese, we have obtained less ore consumption with low acid consumption and low consumption of ammonia. The cost is relatively low. It demonstrated the feasibility of using Comilog manganese oxide reduction to calcinate EMM solution.