A study of the reprocessing of fine and ultrafine cassiterite from gravity tailing residues by using various flotation techniques

Leistner, Tom; Embrechts, M.; Leißner, Thomas; Chelgani, S. Chehreh; Osbahr, Inga; Möckel, Robert; Peuker, Urs A.; Rudolph, Martin

doi:10.1016/j.mineng.2016.06.020

Cited by 92 publications

(34 citation statements)

References 12 publications

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“…From an economic perspective, not only residual amounts of the initial primary resource of the mining operation, but the overall potential of value elements should be considered due to changing demands as a result of technological developments [4]. Advances in analytical techniques like the mineral liberation analysis (MLA) [5,6] as well as improvements in machinery, for example in fine and coarse particle recovery [7][8][9] or flotation techniques [10,11], can be applied to recover valuables.…”

Section: Valorization Of Tailingsmentioning

confidence: 99%

“…These properties will reduce the operational and capital costs of a potential reprocessing operation. However, the disadvantages are due to the physical properties of the tailing's material like an unfavorable particle size distribution [3,9,17], either being too fine or too coarse to be recovered by certain processes. Additionally, an insufficient liberation degree and alterations of bulk and surface properties limit potential reprocessing.…”

Section: Valorization Of Tailingsmentioning

confidence: 99%

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Reprocessing of a Southern Chilean Zn Tailing by Flotation—A Case Study

et al. 2018

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The reprocessing of tailings can have economic and environmental benefits compared to the processing of primary ore deposits. In this paper we present the characterization of a tailings dam in southern Chile by means of mineralogical and geochemical investigations, focusing on sphalerite and trace elements with the aim to investigate a potential reprocessing. The assessment is followed by a flotation study, focusing on the recovery of sphalerite with a high selectivity towards sulfidic and non-sulfidic gangue minerals. An in-depth analysis of a selected test based on mineral liberation analysis data is used to refine the liberation, concentration and flotation weighting function for future investigations.

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Section: Valorization Of Tailingsmentioning

confidence: 99%

Section: Valorization Of Tailingsmentioning

confidence: 99%

Reprocessing of a Southern Chilean Zn Tailing by Flotation—A Case Study

et al. 2018

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“…Tin is produced in almost equal amounts from ores (mostly conventionally mined but also via some artisanal mining) and secondary sources (recycled materials), both yielding some 300,000 tons per year [1]. The most important tin mineral is cassiterite (SnO 2 ), which is commonly concentrated by gravity separation methods owing to the differences between the density of the materials in the gangue (usually silicates) [2], and flotation techniques [3][4][5]. China and Indonesia together produce about 70% of the world's tin, and it is in these countries where most of the world's tin smelters are located.…”

Section: Introductionmentioning

confidence: 99%

Recovery and Purification of Tin from Tailings from the Penouta Sn–Ta–Nb Deposit

et al. 2018

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A concentrate obtained from mining tailings containing mainly cassiterite and columbotantalite was reduced for the production of tin metal. The compounds CaCO 3 , Na 2 CO 3 , K 2 CO 3 , and borax were used as fluxes in the pyrometallurgical reduction smelting process, and graphite was employed as the reducing agent. The greatest recovery of Sn (>95%) was obtained when using CaCO 3 as the flux; the purity of Sn was 96%. A slag equivalent to 25% of the mass of the initial concentrate was produced during the recovery of the Sn. This contained 45% Nb 2 O 5 and Ta 2 O 5 , adding extra value to the mine tailings. The tin metal ingot was purified by electrorefining involving a tin and H 2 SO 4 electrolyte solution and a 101.9 A/m 2 current applied for 148 h. Under these conditions, 90 wt % of the Sn in the ingot was recovered at a purity of 99.97%.

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“…However, the recovery of gravity separation can be as low as 60% to 70% when the cassiterite particle size is smaller than 40 µm [2,3]. Against such a background, froth flotation is usually used to rescue the fine and ultrafine cassiterite particles which are lost in gravity tailings [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

New Insights into the Adsorption of Oleate on Cassiterite: A DFT Study

et al. 2017

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Abstract:A new understanding of the adsorption mechanism of oleate on cassiterite surfaces is presented by density functional theory (DFT) calculations. Various convergence tests were conducted to optimize the parameter settings for the rational simulation of cassiterite bulk unit cell and surface slabs. The calculated surface energies of four low-index cassiterite cleavage planes form an increasing sequence of (110) < (100) < (101) < (001), demonstrating (110) is the most thermodynamically stable surface of cassiterite. The interaction strengths of the oleate ion (OL − ), OH − , and H 2 O on the SnO 2 (110) face are in the order of H 2 O < OH − < OL − , which reveals that the OL − is able to replace the adsorbed H 2 O and OH − on the mineral surfaces. Mulliken population calculations and electron density difference analysis show that electrons transfer from the Sn atoms on the cassiterite (110) surface to the O atoms offered by carboxyl groups of oleate during the interaction. The populations of newly formed O1-Sn1 and O2-Sn2 bonds are 0.30 and 0.29, respectively, indicating that these two bonds are of a very low covalency. Density of states analysis reveals that the formation of an O1-Sn1 bond mainly results from the 5s and 5p orbitals of the Sn1 atom and the 2p orbital of the O1 atom.

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A study of the reprocessing of fine and ultrafine cassiterite from gravity tailing residues by using various flotation techniques

Cited by 92 publications

References 12 publications

Reprocessing of a Southern Chilean Zn Tailing by Flotation—A Case Study

Reprocessing of a Southern Chilean Zn Tailing by Flotation—A Case Study

Recovery and Purification of Tin from Tailings from the Penouta Sn–Ta–Nb Deposit

New Insights into the Adsorption of Oleate on Cassiterite: A DFT Study

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