method for processing pyritic concentrate containing gold

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concentrate gold typical layout

process flow diagram for gold concentrate plant 99/10 Inquire Now concentrator plant flow chart paralokanesthamin gold mining block flow diagram of Ok Tedi porphyry sulphi typical flow diagram of a The stage 1 The iron ore concentrate produced in the process will consist...

Extraction of Gold

The so-called brown gold is formed by the action of nitric acid on an alloy of gold and silver containing 20 per cent of gold The silver dissolves leaving the gold as a brown spongy sheet reconverted at 1040 176 C into ordinary gold The brown form β differs from ordinary α gold in density and magnetic properti...

Methods of Processing of the Gold

Alternative methods of processing the refractory gold-sulfide ores and concentrates were worked out The gold-containing refractory sulfide ores of chalcopyrite pyrite barite-polymetallic quartzites copper-zinc antimonite were used in the research As a result of investigation the optimal...

Extraction of metal values from ores or concentrates

A process is described for leaching ores or concentrates containing one or more metallic sulphides with a circulating liquor so as to solubilize desired metal values therefrom if said metal values are capable of dissolution in an acidic ferric sulphate solution eg copper or so as to render the desired metal values eg gold more accessible to subsequent processing in each case by...

Gold processing

Gold processing - Gold processing - Mining and concentrating The nature of the ore deposit determines the mining and mineral processing techniques applied Oxide ore deposits are frequently of such low grade eg 3 to 10 parts per million that extensive mineral processing cannot economically be justified In this case they are merely shattered by explosives and then piled into heaps for...

Gold Mineral Jigging followed by a Flotation Circuit

Mar 09 2016 0183 32 CIRCUIT PROCESS FLOWSHEET DESCRIPTION A Gold Jig ahead of the flotation circuit with or without amalgamation of the Jig concentrat ORE TREATED Most gold ores where flotation is used for final recovery Lead or lead-silver ores containing coarse lead sulphides or lead oxide minerals also pyritic ores containing gold and silver...

Rcovery of gold in pyritic ores

The most difficult particles to gravity concentrate are the fines and 75 microns to 2 microns are definitely very fine So even if the ore were ground to 2 microns it may not be recoverable using current gravity technology That appears to leave froth flotation as still the best method of recovering the gold from pyritic...

Patents Assigned to Newmont Gold Company

Mar 17 1997 0183 32 Abstract Provided is a method for processing a gold-bearing sulfide ore which involves maintaining the ore in a substantially oxygen free environment preferably beginning with comminution of the ore and ending when a desired final concentrate enriched in sulfide minerals is obtained by flotation In one embodiment nitrogen gas is used to substantially prevent contact between the ore...

PDF RECOVERY OF SILVER FROM CYANIDE LEACH SOLUTIONS

This solution was produced by cyanide leaching of a pyritic gold concentrate 62 g/t containing high levels of silver 110 g/t 3 g/L NaCN pH 105-11 35 w/w 20 176 C 24 h and 10 L...

US5254320A

A method for roasting sulphide ores or ore concentrates containing precious metals is practiced in a furnace typically in a fluidized bed The ore and a sulphur-binding lime-containing material are supplied to a roasting furnace in which the ore is roasted with the emission of heat and sulphur dioxide The lime-containing material--such as calcium hydroxide--is mixed into the cooling water...

PDF Nitric Acid Leaching for Pre

The extraction of gold/silver from a copper-bearing pyritic gold concentrate 62 g/t Au 110 g/t Ag and 03 Cu in thiosulphate solutions was investigated in this study...

Method for processing gold

Provided is a method for processing a gold-bearing sulfide ore which involves maintaining the ore in a substantially oxygen free environment preferably beginning with comminution of the ore and ending when a desired final concentrate enriched in sulfide minerals is obtained by flotation...

Arsenic Pyrite Gold Extraction by Alkaline Leaching Oxidation

Jul 22 2017 0183 32 The gold and silver extractions were 90 and 76 pct respectively by cyanidation of the leach residue When the leaching procedure was applied to a concentrate prepared from an ore containing 01 tr oz/st Au and 01 tr oz/st Ag the gold...

Method for processing mineral material containing acid

Method for processing gold-bearing sulfide ores involving preparation of a sulfide concentrate 1998-11-17 Simmons et al 5653945 Method for processing gold-bearing sulfide ores involving preparation of a sulfide concentrate 1997-08-05 Gathje et al 5489326 Gold recovery using controlled oxygen distribution pressure oxidation 1996-02-06...

Gold extraction

The solubility of gold in a water and cyanide solution was discovered in 1783 by Carl Wilhelm Scheele but it was not until the late 19th century that an industrial process was developedThe expansion of gold mining in the Rand of South Africa began to slow down in the 1880s as the new deposits being found tended to be pyritic oreThe gold could not be extracted from this compound with any...

PDF EFFECT OF ULTRAFINE

Effect of leaching time and cyanide concentration on the extraction of gold and silver d80 22 181 m pH 105 25 3 C flow rate of air 18 L/min solid to liquid ratio 20 w/w stirring speed...

Novel Method for Comprehensive Processing of Low

Low grade copper concentrate composed mainly of plagioclase quartz pyrite chlorite chalcopyrite glauconite is a promising source for the future recovery of copper and other valuable components which processing by existing methods is not economical An alkali fusion-leaching method followed by acid leaching for extraction of copper aluminum silica iron and silver from such low-grade...

Production or Refining of Metals Pretreatment of Raw

METHOD FOR PROCESSING PYRITIC CONCENTRATE CONTAINING GOLD COPPER AND ARSENIC The invention relates to a method for processing pyritic copper sulphide concentrate in which in addition to copper there is arsenic and gold bound to the sulphide minerals or invisible gold In the method concentrate is leached into WO/2009/069781A1...

extracting gold from arsenic ore method

Ore Extraction Arsenic - sailmarineeu extracting gold from arsenic ore method The process of extracting copper from copper ore varies according to the type of...

Gold Pyrite Pyrrhotite and Arsenopyrite Recovery

Apr 15 2018 0183 32 Gold Pyrite Pyrrhotite and Arsenopyrite Recovery One of the more common classes of ores containing gold is when gold is associated with pyrite pyrrhotite and arsenopyrite This is the area of gold recovery that has probably received the most research and plant optimization support especially in light of the long history of South African...

Extracting gold without cyanide

Oct 01 2018 0183 32 CSIRO gold processing team leader Paul Breuer says the CSIRO process targets small high-grade deposits with good gold liberation at a coarse grind size suitable for the gravity tails to be vat-leached A tank-leach process using this leach system is...

Bioprocessing of mine waste effects of process conditions

Jun 10 2019 0183 32 Stored pyritic flotation tailings of copper-zinc ores containing 026 of copper 022 of zinc and 067 g/t of gold were studied A continuous process of biooxidation of this waste was studied at three temperature settings of 35 40 and 45 176 C...

method statement for offshore pipes installation

SPECIFICATION FOR PIPEWORK WELDING INSPECTION 2019-11-12 installation of pipelin ABS will certify or verify design construction and installation of offshore pipelines when requested by the Owner or mandated by government regulations to verify compliance with this Guide a set of specific requirements national standards or other applicable industry standards...

PDF Sequential Bioleaching of Pyritic Tailings and

Dec 07 2020 0183 32 In this work we proposed a method for biohydrometallurgical processing of mining old pyritic flotation tailings and metallurgical slag wastes to recover gold and other nonferrous metals...

method of extracting iron from its ore

The process of separating a metal from its ore is known as smelting Smelting is widely practiced today and has a long history dating back to the Bronze Age when ancient peoples first learned the technique Smelting methods range from the basic to the high-tech and are applied to a variety of materials including aluminum iron and copper...

Historical mercury losses from the gold mines of Victoria

Jul 23 2020 0183 32 Although gold reefs in the area did not contain large quantities of pyrites below the water line several companies developed significant expertise in treating pyritic concentrat These companies installed reverberatory furnaces and mercury-amalgamating equipment to roast and treat pyritic sands from their own crushing plants while...

Flotation processing including recovery of soluble

Method for processing gold-bearing sulfide ores involving preparation of a sulfide concentrate Examples of some iron-containing sulfide minerals include pyritic minerals such as pyrite pyrrhotite and marcasite 134 by biooxidation or pressure oxidation may be accomplished by any technique for processing normal sulfide ores or...

Arsenic Pyrite Gold Extraction by Alkaline Leaching Oxidation

Jul 22 2017 0183 32 The gold and silver extractions were 90 and 76 pct respectively by cyanidation of the leach residue When the leaching procedure was applied to a concentrate prepared from an ore containing 01 tr oz/st Au and 01 tr oz/st Ag the gold extraction...

US20030154822A1

A process for leaching precious metals from material containing precious metals such as oxidic and sulfidic gold-bearing ores is disclosed The process includes the steps of i leaching the precious metal with a leach solution containing a thiosulfate-based lixiviant ii treating the material by oxidising precious metal in the material into a form that is leachable in a subsequent...

CA2326037C

The invention relates to a method of increasing the leaching yield of gold in the cyanide treatment of refractory ores or concentrates of such ores while delivering air in an alkaline environment at atmospheric pressure wherein gold present in said ores or concentrates is bound as tellurid The method is characterised by carrying out the cyanide treatment at a temperature above room...

Flotation kinetics of a pyritic gold ore

Jan 17 2011 0183 32 Research Highlights Flotation kinetics of a pyritic gold ore was studied with respect to particle size Gold recovery increased by 4 with grinding from a P 80 of 205 microns to 53 microns Second order kinetics is a much better representation of semi-batch flotation The first order flotation rate constant is independent of particle size in this range The second order flotation rate constant...

CA2663356C

A process for the indirect bioleaching of zinc sulphide is disclosed and includes leaching solvent extraction electrowinning and oxidant regeneration steps in a closed circuit The leaching step utilizes ferric iron as an oxidant the solvent extraction step utilizes di-2 ethylhexyl phosphoric acid D2EHPA as a solvent extraction reagent the oxidant regeneration step includes the...

PDF Recovering gold from copper concentrate via the

Gold is leached at potentials gt 600 mV vs Ag/AgCl and recovered from the solution by precipitating it on activated carbon or copper concentrate Hyvärinen et al 2004 Haavanlammi et al 2007b...

methods of concentrate gold in africa

Gold prospecting methods that are proven gold may concentrate on the inside of the initial curve also known as gold belts in Australia Canada and Africa Inquire Now method for processing pyritic concentrate containing gold method for processing pyritic concentrate containing gold...

Gold Ore Roasting Techniques

Jul 14 2016 0183 32 A more recent paper Roasting of Arsenical Gold Ores and Concentrates by F R Archibald contains a bibliography listing 23 references on the subject of roasting gold and silver or There are four general types of roasting furnace in use the horizontal multiple-spindle type of which the Edwards furnace and modifications of it are...

US5256186A

A method for the treatment of a mixture of lead dusts and pyritic concentrates said method including the steps of a feeding a mixture of lead dust and pyritic concentrate to a furnace containing molten slag b smelting the mixture by injecting air or oxygen enriched air into the slag by means of a submerged lance to produce a lead bearing slag and c recycling fume to the furnace...