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smelting sulfide gold ores

US1888164A US371123A US37112329A US1888164A US 1888164 A US1888164 A US 1888164A US 371123 A US371123 A US 371123A US 37112329 A US37112329 A US 37112329A US 1888164 A US1888164 A US 1888164A Authority US United States Prior art keywords furnace smelting ore heat iron Prior art date 1929-06-15 Legal status (The legal status is an assumption and is not a legal …

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  • Recovery of gold from sulfide refractory gold ore

    Recovery of gold from sulfide refractory gold ore

    Apr 01, 2021 Typically, gold is encapsulated or finely disseminated in refractory gold ores and the direct cyanidation is not effective for gold extraction from these ores, even after the ore is ground to exceeding small particles (Nazari, 2017, Corrans and Angove, 1991).Especially for sulfide refractory gold ores, in order to recover gold, many oxidation pretreatment technologies were proposed …

  • 12.3 Primary Copper Smelting

    12.3 Primary Copper Smelting

    dried and heated charge for the smelting furnace. Smelting of roasted (calcine feed) or unroasted (green feed) ore concentrate produces matte, a molten mixture of copper sulfide (Cu2S), iron sulfide (FeS), and some heavy metals. Converting the matte yields a high-grade blister copper, with 98.5 to 99.5 percent copper.

  • Sulfide Ore an overview ScienceDirect Topics

    Sulfide Ore an overview ScienceDirect Topics

    The nickel concentrate from sulfide ores normally contains approximately 10% Ni, 2% Cu, 40% Fe, and 30% S. Various processes may be used depending on the types of ores and the smelters employed. Smelting sulfide ores can be accomplished in a reverberatory, flash, or electric smelting furnace..keegan gold mine in chad Fote Mining Machinery Co

  • Sulphide Gold Ore Treatment by Leaching and Flotation Process

    Sulphide Gold Ore Treatment by Leaching and Flotation Process

    Apr 18, 2016 A Flowsheet to recovery gold from sulfide ores. There are many arrangements and combinations using flotation in conjunction with treatment of gold ores. The two gold process flowsheets shown, with some variations, are probably the most commonly used. In Gold Flowsheet No. 1 the ore is ground in water to such a size as to free the minerals ...

  • SMELTING SILVER

    SMELTING SILVER

    the ore prior to smelting, particularly for lower grades of ore. Biringuccio does ... 3 Most precious metal deposits are rich in sulfide minerals, ... 6 For sufficiently pure silver and gold in quartz, amalgamating with mercury was preferred over smelting.

  • Gold in Minerals and the Composition of Native Gold

    Gold in Minerals and the Composition of Native Gold

    The native elements contain the most gold, followed by the sulfide minerals. Several gold tellurides are known, but no gold selenides have been reported, and only one sulfide, the telluride-sulfide mineral nagyagite, ii:; known. The nonmetallic minerals carry the least gold, and the light-colored minerals generally contain less gold ...

  • Rebellious Ores Sulfides Selenides and Tellurides

    Rebellious Ores Sulfides Selenides and Tellurides

    It is extremely important when treating high sulfide ores with cyanide to keep a sufficient protective base in the solution. Many sulfide minerals also contain things like copper or antimony that can react with the cyanide, preventing the cyanide from leaching out the gold and silver.

  • EXTRACTING METALS FROM SULFIDE ORES

    EXTRACTING METALS FROM SULFIDE ORES

    EXTRACTING METALS FROM SULFIDE ORES. Many important metals are present in nature combined with sulfur as metal sulfides; these include cadmium, cobalt, copper, lead, molybdenum, nickel, silver, and zinc. In addition, gold and platinum group metals are associated with sulfidic base metal ores. The extraction of metals from their ores has been an ...

  • Calcium Sulfide Precipitation of Mercury During Cyanide

    Calcium Sulfide Precipitation of Mercury During Cyanide

    Numerous low-grade gold-silver ore de posits are being mined and milled throughout the Western United States (1-7).3 In addition to gold and silver, many deposits contain as much as 15 ppm of mercury. During cyanidation, 10 to 30 pct of the mercury and 85 to 90 pct of the gold are typically solubilized. The

  • Gold Flotation Gold Mining Process Gold Mining

    Gold Flotation Gold Mining Process Gold Mining

    Flotation is also used for the removal of interfering impurities before hydrometallurgical treatment, for the upgrading of low sulfide and refractory ores for further treatment. Flotation is considered to be the most cost-effective method for concentrating gold. Flotation process maximizes the enrichment of gold into sulfide minerals.

  • US5074910A Process for recovering precious metals from

    US5074910A Process for recovering precious metals from

    The present invention is a process to recover precious metals from sulfide ores. It involves chlorinating a mixture of an ore concentrate and salt to form a liquid melt. The salt preferably contains potassium chloride. This chlorination is carried out at a temperature between 300 and 600 C. while stirring. The process converts precious metals in the elemental and sulfide forms into ...

  • Smelting high sulfides Gold concentrates Gold Refining

    Smelting high sulfides Gold concentrates Gold Refining

    Jun 26, 2019 All sulfide ores will respond differently to milling, some will have the sulfides liberated at a coarse grind size, others will need fine milling to achieve liberation. Most small scale miners have neither the equipment nor the expertise to get good gravity separation on a sulfide ore.

  • Smelting and Roasting Ores to recover gold silver and

    Smelting and Roasting Ores to recover gold silver and

    The two of the best known processes are smelting and roasting. The two are actually different methods, but both involve heating the ore to high temperatures. Technically, any methods which consist of processing ore by heating it are called “pyrometallurgy”. The old timers took advantage of the chemical instability of sulfides by simply heating (or roasting) them to burn off the sulfur.

  • Small Scale Treatment of PM Sulfide Ores Gold Refining

    Small Scale Treatment of PM Sulfide Ores Gold Refining

    Feb 15, 2020 Small Scale Treatment of PM Sulfide Ores. There is no one universal way of treating sulfide rich precious metal ores - in the mineral kingdom there are all sorts of complex minerals which contain, in addition to gold or silver, complex combinations of lead, zinc, copper, iron, nickel, manganese, palladium, mercury, antimony, arsenic and others. In addition to sulfur, one may also have ores with …

  • Copper Smelting Chemistry Tutorial AUS e TUTE

    Copper Smelting Chemistry Tutorial AUS e TUTE

    Copper can be extracted from sulfide ores (usually higher grade ores) by direct smelting. The earliest evidence of copper smelting occurs in Serbian artefacts dating from around 5000 BC. Copper can be extracted from oxide ores using electrolysis ( electrowinning ) for low grade ores, or by the carbon reduction method of smelting for higher grade ores.

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