采用硫酸铵焙烧方法从低品位碳酸锰矿中富集回收锰  

Process of Enriching and Recovering Mn by Roasting the Low-Grade Manganese Carbonate Ore with Ammonium Sulfate

作　　者：朱国才[1] 李赋屏[2] 肖明贵[3] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084 [2]中国地质大学(北京),北京100083 [3]桂林工学院,广西桂林541004

出　　处：《桂林工学院学报》2005年第4期534-537,共4页Journal of Guilin University of Technology

基　　金：广西区经贸委;财政厅重点财源开发项目(桂经贸投资[2003]215)

摘　　要：研究了采用硫酸铵焙烧法从低品位碳酸锰矿富集回收锰的工艺.将碳酸锰矿与(NH4)2SO4通过研磨混合均匀,在马弗炉中300～500℃焙烧0.5～3 h.将焙烧过程铵盐分解产生的氨气及二氧化碳气体通过真空通入上一次的浸出液,将硫酸锰沉淀下来.焙砂采用60～90℃热水,在液固为(3～10)∶1的条件下浸取10～20 min,得到硫酸锰浸出溶液,作为下一次焙烧过程的吸收液,对吸收液中过滤得到的滤饼进行干燥后得到锰精矿.吸收液过滤后得到的滤液蒸发浓缩,结晶后又得到了(NH4)2SO4固体,可以复用.采用该工艺的锰回收率达80%以上,是一种从低品位碳酸锰矿富集回收锰的新工艺.A method of enriching and recovering Mn from low-grade manganese carbonate ore with ammonium sulfate roasting method is investigated. It includes the ore with （ NH4 ） 2SO4 by ball-milling , roasting this mixed ore in muffle for 0. 5 -3 h at 300 -500℃ and leaching the calcine with 60 -90℃ hot water as S： L = （3 - 10） ： 1 for 10 - 20 min to obtain MnSO4 solution. The Mn^2 ＋ is precipitated by NH3 · H2O and CO2 released from roasting process, by washing and drying to gain manganese carbonate concentrate. The recovered （NH4 ）2SO4 by vaporizing the filtrate solution can be re-used for the ammonium sulfate roasting process. The Mn recovery is over 80%, a new process of enriching and recovering Mn from low-grade manganese carbonate ore.

关 键 词：低品位碳酸锰矿 硫酸铵 焙烧 富集 锰 

分 类 号：TD951.2[矿业工程—选矿]