high pressure leaching of pgms

  • Enrichment of platinum group metals (PGMs SpringerLink

    The leaching solution is then processed by copper cementation and solvent extraction (SX) to recover PGMs and CuNiCo, respectively. (2) The iron residues are treated by pressure cyanidation leaching to selectively dissolve precious metals. The cyanidation solution is then cemented by zinc power reduction to produce Pt Pd concentrates.

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  • High pressure sulfuric acid/oxygen leaching of platinum

    High pressure sulfuric acid/oxygen leaching of platinum group metals bearing Ni Cu mattes investigate the behaviour of PGMs in high pressure leaching systems are discussed and compared with

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  • A new technique for extraction of platinum group metals by

    As shown in Table 3, under pressure acid leaching conditions, the Cu, Ni and Co in the flotation concentrates were almost completely leached into solution with > 99% extracted.Whilst Table 4 indicates that, after two stages of pressure cyanide leaching, the weight of cyanide leach residue was only 2025% of the flotation concentrates, and the Pt and Pd content in the residues were

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  • Pressure Leaching of Copper Concentrates

    2 October 25th, 2004 Presentation Outline Safety share Introduction Global copper reserves/resources Phelps Dodge production & reserves profile Commercial drivers for copper concentrate leaching The copper concentrate market and TC/RCs Phelps Dodge copper pressure leaching developments High temperature Medium temperature Critical success factors for

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  • Pressure and Ambient LeachingMiningSGS

    Pressure leaching, high pressure leaching and pressure oxidation are conducted in an autoclave at carefully controlled temperatures and pressures. These technologies involve a large capital investment and higher operating costs, but yield high recovery rates from difficult, complex or refractory ores. Advantages and limitations include:

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  • A conceptual flowsheet for heap leaching ScienceDirect

    No explanation was offered for this but perhaps such high concentrations are needed to successfully drive the reaction between cyanide and the PGMs. In gold leaching such high cyanide concentrations are used when leaching less cyanide soluble gold tellurides and arsenides, and when there is above 0.5% copper in the ore (Adams, 2005, Gupta and

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  • Leaching and recovery of platinum group metals from UG 2

    Leaching and recovery of platinum group metals from UG 2 concentrates yields were not good (less than 40 per cent). Platinum leaching was particularly poor with cyanide (ambient temperature). A HCl/chlorine leach on untreated material had the same effect as a cyanide leach with a nitric acid pre leach,

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  • A conceptual flowsheet for heap leaching of platinum group

    A conceptual flowsheet for heap leaching of platinum group metals (PGMs) from a low grade ore concentrate James M. Mwase 1, Jochen Petersen , J.J. Eksteen2 1. Department of Chemical Engineering, University of Cape Town, South Lane Road, Upper Campus,

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  • High pressure leaching of PGM flotation tailings in

    High pressure leaching of PGM flotation tailings in chloride and nitric acid media. Article · January 2008 (PGMs) in the mine tailings varied between 0.80 g/t and 1.01 g/t, which was upgraded

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  • Nitrous Sulfuric Acid Pressure Leaching of Platinum Group

    Testing of Stillwater smelter PGM mattes using Sunshine nitrous sulfuric acid pressure leaching was successful. A proposed flowsheet is presented in Figure 2. High grade PGM solids, which could be refined domestically, are produced from both the TBRC and Electric Furnace mattes.

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