Effect of microwave pre-treatment on the magnetic properties of iron ore and its implications on magnetic separation

被引：80

作者：

Omran, Mamdouh ^{[1
,2
]}

Fabritius, Timo ^{[1
]}

Elmandy, Ahmed M. ^{[2
]}

Abdel-Khalek, Nagui A. ^{[2
]}

El-Aref, Mortada ^{[3
]}

Elmanawi, Abd El-Hamid

机构：

[1] Univ Oulu, Proc & Environm Engn Dept, Lab Proc Met Res Grp, SF-90100 Oulu, Finland

[2] Cent Met Res & Dev Inst, Mineral Proc & Agglomerat Lab, Cairo, Egypt

[3] Cairo Univ, Fac Sci, Dept Geol, Giza 12613, Egypt

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2014年 / 136卷

关键词：

Microwave radiation; Iron ore; Magnetic properties; Magnetic separation; IRRADIATION; RADIATION; ILMENITE; PYRITE;

D O I：

10.1016/j.seppur.2014.09.011

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The use of microwave heating is a potential means of energy savings and is a more effective alternative to the conventional thermal processing of minerals. The effect of microwave treatment on Egyptian iron ore samples was investigated. Changing the microwave exposure time and power as well as their reflection on the magnetic properties of iron ore before and after microwave pretreatment was analyzed using different techniques. Microwave treatment was found to be more efficient at larger particle sizes and longer exposure times for a fixed value of the applied power intensity. Magnetic separation of microwave treated and untreated iron ore indicated that iron recovery increased from 39.54% in the untreated sample to 97.95% in the microwave-treated sample. The results indicated that microwave radiation has a significant effect on the magnetic properties of hematite through the formation of new and more magnetic phases that facilitate their separation from non-magnetic minerals, thereby obtaining high recovery, reaching ca. 98%. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：223 / 232

页数：10

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