摘要
阐述了采用铵盐法从低品位碳酸锰矿石中富集回收锰的方法,该方法是将低品位碳酸锰矿石与NH4Cl通过研磨混合均匀,在管式炉中于450℃焙烧1h,焙砂采用热水浸取,得到氯化锰浸出溶液。用焙烧过程产生的氨气及二氧化碳气体通过真空通入浸出液,将锰沉淀下来,过滤、干燥后得到锰精矿;滤液蒸发浓缩、结晶,得到了NH4Cl固体,可以复用。结果表明,采用该工艺的锰回收率达90%以上。认为该方法是一种从低品位碳酸锰矿石中富集回收锰的绿色化学工艺。
The ammonium salt roasting method is proposed to enrich and recover Mn from low grade ore of manganese carbonate. It included a process of mixing the ore with NH_4Cl by ball milling, roasting this mixed ore in pipe stove at 450℃ for one hour and leaching the calcine with hot water to obtain MnCl_2 solution. Further, manganese is precipitated by NH_3·H_2O and CO_2 released from roasting process, washing and drying to get concentrated manganese ore. The NH_4Cl obtained by vaporizing the filtrate solution can be reused for the ammonium salt roasting process. The result indicates that Mn recovery rate can be reached to be more than 90%. This method is considered to be a green chemistry process to enrich and recover Mn from low grade ore of manganese carbonate.
出处
《矿产与地质》
2005年第1期93-96,共4页
Mineral Resources and Geology
基金
广西重点财源项目"广西金属矿产资源综合利用研究及产业化开发"(编号:桂经[2003]215)资助
关键词
化学选矿
碳酸锰矿石
铵盐
富集
绿色化学工艺
chemical beneficiation, manganese carbonate, ammonium salt, enrich, green chemistry process
