Leaching of a zinc ore and concentrate using the Geocoat™ technology

Soleimani, Mohammad; Petersen, Jochen; Roostaazad, Reza; Hosseini, S.H.; Mousavi, Seyed Farhad; Najafi, Alireza; Vasiri, A. Kazemi

doi:10.1016/j.mineng.2010.10.003

Cited by 8 publications

(4 citation statements)

References 16 publications

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“…In the case of refractory gold concentrates or platinum group element (PGE) extraction, the leached de-sulfidised residues would be washed off the support rocks and re-processed for the extraction of the metal. For base metals, soluble metals were recovered from the pregnant leach solutions (e.g., laboratory-scale tests for zinc and copper concentrates [174][175][176]). The use of vat leaching for readily-leached oxidised ores has been largely superseded by dumps or heaps.…”

Section: Technology Developmentsmentioning

confidence: 99%

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

Watling

2014

Minerals

137

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This review has as its underlying premise the need to become proficient in delivering a suite of element or metal products from polymetallic ores to avoid the predicted exhaustion of key metals in demand in technological societies. Many technologies, proven or still to be developed, will assist in meeting the demands of the next generation for trace and rare metals, potentially including the broader application of biohydrometallurgy for the extraction of multiple metals from low-grade and complex ores. Developed biotechnologies that could be applied are briefly reviewed and some of the difficulties to be overcome highlighted. Examples of the bioleaching of polymetallic mineral resources using different combinations of those technologies are described for polymetallic sulfide concentrates, low-grade sulfide and oxidised ores. Three areas for further research are: (i) the development of sophisticated continuous vat bioreactors with additional controls; (ii) in situ and in stope bioleaching and the need to solve problems associated with microbial activity in that scenario; and (iii) the exploitation of sulfur-oxidising microorganisms that, under specific anaerobic leaching conditions, reduce and solubilise refractory iron(III) or manganese(IV) compounds containing multiple elements. Finally, with the successful applications of stirred tank bioleaching to a polymetallic tailings dump and heap bioleaching to a polymetallic black schist ore, there is no reason why those proven technologies should not be more widely applied.

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Section: Technology Developmentsmentioning

confidence: 99%

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

Watling

2014

Minerals

137

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“…Sphalerite is one of the most important sources for Zn production in the world. Zn extraction from sphalerite using bioleaching has recently attracted more attention due to the economic and ecological advantages of this technology over traditional roasting and smelting (Deveci et al, 2004;Giaveno et al, 2007;Haghshenas et al, 2009;Mousavi et al, 2007;Rodriguez et al, 2003;Shi et al, 2006;Soleimani et al 2011;Souza et al, 2007).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Zinc recovery during refractory ore biooxidation by an indigenous consortium

Marchevsky

Urbieta

Bernardelli

et al. 2015

International Journal of Mineral Processing

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“…baffles, plates and screens, resulting in increased costs. Therefore, it is significant to be able to design a rational geometrical structure to achieving a more desirable oxygen transfer rate in practical application …”

Section: Introductionmentioning

confidence: 99%

Oxygen mass transfer characteristics in an internal‐loop airlift reactor with preset trumpet‐shaped riser

Huang

et al. 2014

Asia-Pacific J Chem Eng

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A size-adjustable trumpet-shaped riser was installed into a conventional airlift reactor to form a modified internal-loop airlift reactor (ILAR). The volumetric oxygen mass transfer coefficient (k L a) and gas holdup of the ILAR were heavily influenced by the height ratio of riser to static fluid level above the spargers (h/H), the cross-sectional area ratio of riser to downcomer (A r /A d ) and the superficial gas velocity in the riser (U g ) when deoxidized distilled water was used as the oxygen absorbent. An oxygen transfer rate of (2.17 ± 0.11) × 10 À5 kg m À3 s À1 , k L a of (27.88 ± 1.12) × 10 À3 s À1 and gas holdup of 0.031 were obtained with the ILAR of A r /A d = 1.09 and h/H = 0.73 at U g = 18 mm s À1 . As the well-constructed preset trumpet-shaped riser provided ideal conditions for complete circulation and blending of the fluid, enhanced oxygen transfer efficiency was achieved. The gas holdup and k L a were increased by 16.2% and 10.2% at 19°C, as compared with those of the conventional airlift reactor without this preset riser. The fluid rising velocity in the riser (V R ) and falling velocity in the downcomer (V D ) may be expressed by power-law functions of U g and A r /A d , respectively. These metrics indicate that the ILAR has better performance, as compared with a conventional airlift reaction, for oxygen transfer and microorganism culture for chemical engineering, biological fermentation and environmental protection.

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Leaching of a zinc ore and concentrate using the Geocoat™ technology

Cited by 8 publications

References 16 publications

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

Review of Biohydrometallurgical Metals Extraction from Polymetallic Mineral Resources

Zinc recovery during refractory ore biooxidation by an indigenous consortium

Oxygen mass transfer characteristics in an internal‐loop airlift reactor with preset trumpet‐shaped riser

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