摘要
针对四川攀西 ｗ（ ＭｎＯ） ＝ ８－２ ％ 的稀土矿泥，采用ＳＯ２ 作还原剂，在２００ Ｌ 反应釜中进行预脱锰，在ｎ（ＳＯ２） ｎ（ Ｍｎ） ＝ ２－４ ，ＬＳ＝ ３∶１ 的条件下，锰的浸出率为７０ ％ 以上，而稀土及铁的浸出率分别小于１ ％ 及３ ％ 。锰浸出液除杂后采用碳酸氢铵沉淀得到碳酸锰产品， 产品纯度达到９６－７８ ％ 。脱锰矿泥与氯化铵按ｍ（ＮＨ４ Ｃｌ） ｍ（ 矿泥） ＝ ０－２ ～０－３ 混合，在５２０ ℃下焙烧２－５ ｈ ，稀土浸出率达到８０ ％ 以上，比原矿泥直接氯化焙烧的回收率提高约４０ ％ 。
In a zool reactor, removal of Mn from Panxi black slimes containing 8 7% MnO was conducted using SO 2 as reductant. At the n (SO 2)/ n (Mn) ratio of 2.4 and the L/S ratio of 3, the leach yield of Mn was above 70% and the leach yields of RE and iron are less than 1% and less than 3%, respectively. Purified Mn leach solution was precipitated using ammonium bicarbonate, obtaining maganese carbonate with a purity of 96.78%. The slime after manganese removal was mixed with ammonium chloride in the ratio of 0.2～0.3, and roasted for 2.5 h at 520 ℃,obtaining a RE leach yield of above 80%, which is 40% higher than the leach yield obtained by direct chloridizing roast of the original slimes.
出处
《矿冶工程》
CAS
CSCD
北大核心
1999年第4期37-39,42,共4页
Mining and Metallurgical Engineering
基金
国家自然科学基金!59804004
59674021
国家杰出青年基金!59725408
关键词
稀土
锰
回收
稀土矿泥
中间试验
rare earth (RE)
manganese (Mn)
black weathered slime
pilot test
