The beneficiation of tailing of coal preparation plant by heavy-medium cyclone

Bahrami, AtaallahDepartment of Mining EngineeringUrmia UniversityUrmiaIran (author)

Dense-medium cyclones have been used for beneficiation of fine particles of coal. In this study, the usability of cyclones in the beneficiation of tailings of a coal preparation plant was investigated. For this purpose, separation tests were conducted using spiral concentrator and heavy medium cyclones with the specific weight of medium 1.3–1.8 (g/cm3) on different grading fractions of tailing in an industrial scale (the weight of tail sample was five tons). Spiral concentrator was utilized to beneficiate particles smaller than 1 mm. In order to evaluate the efficiency of cyclones, sink and float experiments using a specific weight of 1.3, 1.5, 1.7 and 1.9 g/cm3, were conducted on a pilot scale. Based on the obtained results, the recovery of floated materials in cyclones with the specific weight of 1.40, 1.47 and 1.55 g/cm3 are 17.75%, 33.80%, and 50%, respectively. Also, the cut point (ρ50), which is the relative density at which particles report equally to the both products are 1.40, 1.67 and 1.86 g/cm3. The probable errors of separation for defined specific weights for cyclones are 0.080, 0.085 and 0.030, respectively. Also, the coefficients of variation was calculated to be 0.20, 0.12 and 0.03. Finally, it could be said that the performance of a cyclone with a heavy medium of 1.40 g/cm3 specific weight is desirable compared with other specific weights.

Ghorbani, YousefLuleå tekniska universitet,Mineralteknik och metallurgi(Swepub:ltu)yougho (author)
Mirmohammadi, MirsalehSchool of Mining EngineeringUniversity of TehranTehranIran (author)
Sheykhi, BehnamDepartment of Mining EngineeringUrmia UniversityUrmiaIran (author)
Kazemi, FatemehDepartment of Mining EngineeringUrmia UniversityUrmiaIran (author)
Department of Mining EngineeringUrmia UniversityUrmiaIranMineralteknik och metallurgi (creator_code:org_t)

In:International journal of coal science & technology: Springer5:3, s. 374-3842095-82932198-7823

By the author/editor: Bahrami, Ataalla ...; Ghorbani, Yousef; Mirmohammadi, Mi ...; Sheykhi, Behnam; Kazemi, Fatemeh

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Metallurgy and M ...

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