A review of pretreatment of diasporic bauxite ores by flotation separation

被引：61

作者：

Gibson, B. ^{[1
]}

Wonyen, D. G. ^{[1
]}

Chelgani, S. Chehreh ^{[1
,2
]}

机构：

[1] Univ Liberia, Fac Engn, Dept Geol & Min Engn, Monrovia, Liberia

[2] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA

来源：

MINERALS ENGINEERING | 2017年 / 114卷

关键词：

Bayer process; Direct flotation; Reverse flotation; Diaspore; Flocculation and aggregation; REVERSE FLOTATION; ALUMINOSILICATE MINERALS; ADSORPTION MECHANISM; CATIONIC COLLECTORS; FROTH FLOTATION; KAOLINITE; PERFORMANCE; PYROPHYLLITE; ILLITE; STARCH;

D O I：

10.1016/j.mineng.2017.09.009

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The Bayer process is a conventional method for refining bauxite in the production of alumina. The Al/Si ratio in bauxite before feeding to the process must be enriched to more than eight by reducing impurities (mainly aluminosilicates). Therefore, diasporic bauxite ores (Al/Si < 6) have to be upgraded by pretreatment methods to meet the required quality for the Bayer process. Flotation separation (direct or reverse) followed by flocculation as an efficient pretreatment method is the main beneficiation technique for upgrading diaspore. Diaspore pretreatment by flotation favors several conditions and possesses certain limitations. This study has systematically explored various effective flotation factors (particle size, surface electrical charge, collectors, depressants, dispersants, flocculation and aggregation) and limitations in the pretreatment of diaspore and has compiled optimum results for its beneficiation. The summary offers various approaches for the selective flotation of diasporic ores via different conditions and suggests perspectives for further investigation.

引用

页码：64 / 73

页数：10

共 67 条

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