Thermogravimetric study of the dehydration and reduction of red mud

Teplov, O. A.; Korenovskiǐ, N. L.; Lainer, Yu. A.

doi:10.1134/s0036029515010127

Cited by 2 publications

(1 citation statement)

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“…The yield of the non-magnetic fraction was 85.77 wt %. The carbon concentrate can be reused for combustion in thermal power plants or as an additive in metallurgical processes, for example, when replacing coal or hydrogen flow in the reductive roasting of magnetite pellets and red mud at temperatures below 1000 • C [30][31][32]. Based on the results of research, the following flowsheet of the CFA enrichment process using wet magnetic separation and flotation is suggested (Figure 11).…”

Section: Carbon Flotation Of the Non-magnetic Fraction Of Cfamentioning

confidence: 99%

Magnetite and Carbon Extraction from Coal Fly Ash Using Magnetic Separation and Flotation Methods

et al. 2019

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In this study, enrichment methods for coal fly ash (CFA) from Omsk thermal power station No. 4 (TPS-4) were investigated. The magnetite and unburned carbon concentrates were obtained by magnetic separation and flotation methods. The wet magnetic separation used in the study increased the magnetite content in the magnetic fraction from 10.48 to 12.72 wt % compared to dry magnetic separation. The XRD analysis showed that the magnetic fraction primarily consists of magnetite, mullite, and quartz. The SEM analysis demonstrated that magnetite is located primarily on the surface of alumosilicate spheres and has three types of shape: dendritic structures, hexagonal bulk agglomerates, and star-like structures. For the flotation tests, a low-price diesel was used as the collector. It was found that, if CFA particles of 40–71 µm are used, ~99% of unburned carbon can be recovered. It was also found by SEM that, if CFA particles of 71–100 µm are used, alumosilicates on a carbon surface prevent complete interaction of diesel with carbon particles and decrease thereby carbon recovery to 83%.

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Section: Carbon Flotation Of the Non-magnetic Fraction Of Cfamentioning

confidence: 99%