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Application of dry high-intensity magnetic separation in upgrading low-grade iron ore of Rouina deposit, Algeria

作者：

Messai A. , Idres A. , Menendez-Aguado J.M.

作者单位：

University of Badji Mokhtar, Faculty of Earth Sciences, Mining Department, Laboratory of Mineral Resources Valorization and Environment, Annaba, Algeria , University of Oviedo, Polytechnic School of Mieres, Mineral Raw Materials Processing Research Group, Spain

摘要：

The recent developments of steel and iron industries generated a huge consumption of iron ores which has attracted much attention for utilizing low-grade iron resources to satisfy this increasing demand. The present study focuses on the characterization and enrichment of the low-grade iron ores from Rouina deposit-Ain Defla-. Currently, the ore is used in the cement industry because it is considered a low-grade iron ore. After the sampling process, a physico-chemical and mineralogical characterization was carried out and the results revealed that the sample consists of hematite, limonite and goethite as major opaque oxide minerals whereas silicates as well as clays form the gangue minerals in the sample. The average grade of FeTotal, SiO2 and Al2O3 contents in the raw material collected from the mine of the case study are 30.85%, 23.12% and 7.77% respectively. Processes involving combination of classification, washing and dry high-intensity magnetic separation were carried out to upgrade the low-grade iron ore sample to make it suitable as a marketable product. The sample was first ground and each closed size sieve fractions were subjected to washing followed by drying than dry high intensity magnetic separation and it was observed that limited upgradation is possible. As a result, it was possible to obtain a magnetic concentrate of 54.09% with a recovery degree of 89.30% and yield of 62.82% using a magnetic field intensity equal to 2.4 Tesla at the size fraction [-0.125 +0.063 mm].

语种：

EN,SR

来源期刊：

Journal of Mining and Metallurgy. Section A: Mining

出版商：

University of Belgrade, Technical Faculty Bor

年，卷（期）：

2020;56(1):47-58