Concentration of rare earth minerals from coal by froth flotation

Q2 Materials Science
Wencai Zhang, R. Honaker, J. Groppo
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引用次数: 34

Abstract

Rare earth elements (REEs) found in coal are in the form of minerals, ion-adsorbed onto clay surfaces or inner layers, or organically bound. Rare earth minerals such as monazite exist in coal and have grain sizes smaller than 5 µm. In this study, froth flotation was successful in concentrating rare earth minerals existing in a thickener underflow material derived from Fire Clay seam coal that contained around 431 ppm of total rare earth elements (TREE) on a dry ash basis. Conditioning with fatty acid followed by processing using multiple stages of conventional flotation produced a final concentrate containing 2,300 ppm TREE. Using a laboratory flotation column to limit hydraulic entrainment, the TREE content was further enriched to around 4,700 ppm, which equated to an enrichment ratio of 10:1..
泡沫浮选法从煤中富集稀土矿物
在煤中发现的稀土元素以矿物的形式存在,离子吸附在粘土表面或内层上,或有机结合。稀土矿物如独居石存在于煤中,颗粒尺寸小于5µm。在本研究中,泡沫浮选成功地富集了来自Fire Clay煤层煤的浓缩机底流材料中的稀土矿物,该材料在干灰基础上含有约431 ppm的总稀土元素(TREE)。用脂肪酸进行调理,然后采用常规浮选的多个阶段进行处理,最终精矿的TREE含量为2300 ppm。使用实验室浮选柱限制水力夹带,进一步将TREE含量富集到约4700 ppm,相当于10:1的富集比。
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来源期刊
Minerals & Metallurgical Processing
Minerals & Metallurgical Processing 工程技术-矿业与矿物加工
CiteScore
0.84
自引率
0.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: For over twenty-five years, M&MP has been your source for the newest thinking in the processing of minerals and metals. We cover the latest developments in a wide range of applicable disciplines, from metallurgy to computer science to environmental engineering. Our authors, experts from industry, academia and the government, present state-of-the-art research from around the globe.
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