Enrichment of Cobalt Values by Dry Magnetic Separation from Low-Grade Manganese Ores of Bonai-Keonjhar Belt, Orissa

Rapid reduction roasting of low grade manganese carbonate ore by coal and biomass fuels from Hunan, China was investigated. Magnetic separation behaviors and magnetic properties of raw manganese ore and roasted manganese ores were analyzed. After reduction by coal and biomass fuels, the manganese ores demonstrate a new Mn-Fe oxide phase, showing obvious mixed magnetic behaviors of ferromagnet and paramagnet, and the magnetic susceptibilities of roasting ores rapidly increase to almost two orders of magnitude in comparison of the raw ores. The results show that magnetizing roasting technology could enhanced the magnetic properties of the manganese ores about two orders of magnitude higher than raw manganese ore at low roasting temperature. Thereby, we deduce that the weak magnetic separation combined with high magnetic separation could be adequate for roasted manganese ore to satisfy the requirement of electrolytic manganese industry. Application of biomass in manganese ore roasting process is promising to the effective use of biomass and for decreasing the consumption of fossil fuels in the manganese industry.

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Characterizations on phase reconstruction, microstructure evolution and separation of magnetic ferrite ceramics from low-grade manganese ores by novel uphill reaction diffusion and magnetic separation

Materials Characterization ◽

10.1016/j.matchar.2021.111028 ◽

2021 ◽

pp. 111028

Author(s):

Bingbing Liu ◽

Li Zhang ◽

Bei Zhang ◽

Jia Wang ◽

Yuanbo Zhang ◽

...

Keyword(s):

Magnetic Separation ◽

Microstructure Evolution ◽

Reaction Diffusion ◽

Low Grade ◽

Phase Reconstruction ◽

Manganese Ores

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The Development of Preconcentration Technology in Low-Grade Magnetite’s Beneficiation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.361-363.324 ◽

2011 ◽

Vol 361-363 ◽

pp. 324-327

Author(s):

Chun Hong Xu

Keyword(s):

Magnetic Separation ◽

Steel Industry ◽

Iron Ore ◽

Separation Process ◽

Low Grade ◽

High Grade ◽

Separation Technology ◽

Great Progress ◽

Dry Magnetic Separation ◽

Production Practices

Exhaustion of high-grade magnetite resources and large demand for iron ore in the rapidly developing steel industry promotes the mining enterprises to exploit low-grade magnetite. Low-grade magnetite with a low content of valuable minerals is hard to be separated with the conventional separation process flow because of its high beneficiation costs. By preconcentration technology, enriching valuable minerals and discarding large amounts of gangue as soon as possible before grinding, low beneficiation costs can be achieved in low-grade magnetite’s beneficiation. After continuous researches and production practices and the development of relevant efficient crushing and separating equipments, preconcentration technology has made great progress: from crushing-dry magnetic separation technology to grinding-wet magnetic separation technology, then to ultrafine crushing-wet magnetic separation technology. Now preconcentration has become an indispensable stage in low-grade magnetite’s beneficiation.

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