摘要
研究了西南稀土矿的矿石性质及分选工艺．原矿风化强烈，产生大约２０％的黑色风化物矿泥。－矿石中可工业利用的稀土赋存形式有矿物相和胶态相。矿物相稀土以氟碳铈矿为主，占９６％以上，重选或重浮选联合工艺可得到ＲＥＯ３０％，５０％和６０％的氟碳铈矿精矿，稀土回收率６５％。胶态相稀土则吸附在Ｆｅ－Ｍｎ非晶质氧化物矿物上，用热盐酸浸出，氨水除杂，草酸沉淀回收稀土，稀土回收率７４．３％，并副产铅。矿石和黑色风化物中稀土都强烈选择铈族稀土，∑ＣｅＯ２在９０％以上，且ＣｅＯ２＞Ｌａ２Ｏ３＞Ｎｄ２Ｏ３。
The ore properties of rare earth (RE) ore of Southwest Territory, China, and its beneficiation technology have been studied. The ore is strongly weathered to produce 20% black slime. RE available for commercial use in ore is occurred in two phases: mineral and colloidal. The main (>96%) RE mineral of mineral phase is bastnaesite. The bastnaesite concentrates (30%、 50% and 60% REO) can be obtained by gravity separation or gravity-flotation combined process at 65% recovery of RE. RE minerals of colloidal phase is absorbed in non-crystal minerals of Fe-Mn oxide. It can be recovered by hot HC1 leaching-purification with liquid ammonia-oxalic acid precipitation route at 74.3% of RE, and lead can be obtained as byproduct. The ore and the black weathered minerals are rich in cerium family RE (∑CeO2>90%, CeO2>La2O3>Nd2O3).
出处
《稀有金属与硬质合金》
CAS
CSCD
1994年第3期33-39,共7页
Rare Metals and Cemented Carbides
关键词
氟碳铈矿
分选
稀土
铅
bastnaesite, beneficiation, weathering action, colloid phase,rare earth
