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  • The Extraction of Gold from E-waste by Hydrometallurgy : Oriental ...

    extraction; gold; 0.5 M sodium thiosulfate; leaching; e-waste ... In the hydrometallurgical process of copper anode sludge, valuable metals like gold and silver .... compounds but has covalent bonds with oxygen, nitrogen, sulfur, or hydrogen.

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  • Metal Extraction Processes for Electronic Waste and Existing ...

    Feb 19, 2014 ... presence of precious metals (PMs) in e-waste such as gold (Au), silver ..... In the sulfur-based route (primary copper smelting), copper matte...

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  • How copper is made - material, used, processing, steps, product ...

    The first mention of the systematic extraction of copper ore comes from about 3800 ... The most common are known as sulfide ores in which the copper is chemically bonded with sulfur. ... Many copper ores also contain significant quantities of gold, silver, nickel, and ... The first step is to remove some of this waste material.

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  • ABB helps turn electronic scrap into gold

    Mar 19, 2012 ... ABB helps turn electronic scrap into gold. ... recovering copper and precious metals from electronic scrap using only a fraction of the ... After smelting, the molten metals are transferred to the adjoining ... as well as considerable quantities of lead, gold, silver, zinc clinker, sulfuric acid and liquid sulfur dioxide.

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  • Sulphur Refining of Gold - Mineral Processing / Metallurgy

    Mar 23, 2016 ... 1 Refining with Sulphur and other Metals Together; 2 Refining with ... If a large proportion of copper be alloyed with gold then by .... The regulus or mixed sulphides is melted with scrap iron to precipitate the silver and lead.

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  • Extraction of Precious Metal "GOLD" from Electronic Waste by ...

    Oct 25, 2015 ... Keywords: Electronic waste, metal extraction/recovery, Pyro ... lbs. of copper, 800 lbs. of silver , 80 lbs. of gold, 30 lbs. of palladium. ...... extraction of electrons and bond breaking by [Fe3+], extraction of sulfur by polysulfide and...

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  • The Life Cycle of Copper, its Co-Products and By-Products - IIED

    Jan 24, 2002 ... Sulfur recovery . .... Recovery and recycling of electronic scrap . ..... production of 1 tonne of copper from concentrate(a) and scrap, Germany...

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  • Copper Processing

    The copper processing industry refines copper from metal ores or scrap copper ... End uses of copper include construction materials, electronic products, and ... Copper can be produced as either a primary product or as a co-product of gold, lead, ... Sulfur dioxide gases are also collected and made into sulfuric acid for use in...

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  • Copper smelter revenue stream - Boliden.com

    Nov 4, 2008 ... Treatment Charge and Refining Charge for copper. ▫ Refining .... Electronic scrap (containing copper, gold, silver and lead). – Copper/zinc...

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  • Copper, Silver and Gold

    Nov 24, 2002 ... Copper, silver and gold are found in elemental or "native" form at the earth's surface. ... All three metals are important in technology, especially in electronics. ... This process of annealing could have been the first metallurgical ..... to slag off iron and more sulphur, producing a black matte consisting mainly of...

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