Mineral properties and leaching characteristics of volcanic weathered crust elution-deposited rare earth ore

被引：15

作者：

Hu Guhua ^{[1
]}

Feng Zongyu ^{[2
]}

Dong Jinshi ^{[2
]}

Meng Xianglong ^{[2
]}

Xiao Yanfei ^{[2
]}

Liu Xiangsheng ^{[2
]}

机构：

[1] Chalco Guangxi Nonferrous Rare Earth Dev Co Ltd, Nanning 530000, Peoples R China

[2] Grirem Adv Mat Co Ltd, Gen Res Inst Nonferrous Met, Natl Engn Res Ctr Rare Earth Mat, Beijing 100088, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2017年 / 35卷 / 09期

关键词：

rare earth; volcanic; weathered crust; ammonium sulfate leaching; magnesium sulfate leaching; CLAY-MINERALS; SORPTION; SULFATE;

D O I：

10.1016/S1002-0721(17)60993-1

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Weathered crust elution-deposited rare earth ore is an important resource of rare earths, including grantic weathered crust elution-deposited rare earth ore and volcanic weathered crust elution-deposited rare earth ore. The development condition of the weathered crust, weathering degree and mineral composition of these ores will be different because of the differences between their parent rocks and weathered crust causes of mineralogy path. Therefore, mineral properties and leaching characteristics of volcanic weathered crust elution-deposited rare earth ore from Chongzuo (CZ), Guangxi province were investigated. It was found that the CZ rare earth ore was a typical mid-yttrium and rich-europium ore, with the overall rare earth (REE) grade in ion-exchangeable phase of 0.15%. Partide size classification showed that finer particle had a higher REE grade. Column leaching tests showed that the leaching efficiency of REE was above 94% with leaching agent concentration of 0.20 mol/L, liquid-solid ratio of 4: 3, flow rate of 0.60 mL/min, and initial pH value around 5.67. Compared to ammonium sulfate leaching, magnesium sulfate leaching was advantaged by nearly zero ammonia nitrogen emission while their REE leaching was almost equivalent.

引用

页码：906 / 910

页数：5

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