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ore leaching sulfide

ore leaching sulfide

Sulphide Leaching - Mineral Processing & Metallurgy

Jun 24, 2015 · Most sulphides are oxidized to sulphate. From the sulphated ore, all of the zinc, copper and iron can be leached with water while lead, silver,

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WO2013163712A1 - Sulfide ore leaching process - Google Patents

The present invention discloses a new process for leaching sulfide minerals consisting of leaching crushed ore in a vat reactor, wherein the leaching solution is fed with an ORP value close to the upper limit suitable for leaching and the exiting leaching solution leaves the reactor with an ORP above the lower limit suitable for leaching the ore.

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Sulphide Gold Ore Treatment by Leaching and Flotation Process

Apr 18, 2016 · Two examples are the large low-grade ore bodies which require very fine grinding and refractory sulphides which have to be concentrated and roasted to expose gold to cyanide action. A Flowsheet to recovery gold from sulfide ores There are many arrangements and combinations using flotation in conjunction with treatment of gold ores.

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Industrial Heap Bioleaching of Copper Sulfide Ore Started ...

Nov 22, 2021 · these tests proved that it was possible to achieve the goal of starting the heap bioleaching only by water irrigation, but some critical points should still be followed to accelerate the process: (1) select the ore with higher pyrite content and lower alkali gangue mineral; (2) wet the ore earlier to guarantee more time for sulfide mineral

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A fundamental study of the alkaline sulfide leaching of gold

been the dominant method for oxidising sulfide bearing gold ores and concentrates. However, with the cost associated with treating SO 2 gas and the increasing concerns over emissions, many gold mines have considered other technologies such as bacterial leaching and pressure oxidation for treating sulfide containing ores.

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What is the best method for sulfide copper leaching?

A low grade sulphide ore leaching could be contemplated using an oxidative / bacterial heap leach. Another option is to concentrate the sulphides using flotation, then atmospheric or

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Guides For High-sulfide Gold Processing

Mar 17, 2020 · Flotation-roasting-cyanidation leaching process for high-sulfide gold ore The symbiotic relationship between gold and sulfide in high-sulfide gold ore is close, and most of the gold is wrapped in sulfide, so the gold recovery rate of direct leaching will be extremely low.

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Leaching Kinetics of Antimony from Refractory Gold Ore in ...

Dec 01, 2020 · The leaching kinetics of antimony from refractory gold ore in alkaline sodium sulfide was investigated under ultrasound. The influence of factors such as stirring speed, temperature, the concentration of sodium hydroxide and sodium sulfide and particle size, was studied. The leaching kinetics has also been studied under convention and ultrasound.

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Extraction of copper from complex carbonaceous sulfide ore ...

Nov 01, 2021 · Therefore, sulfide precipitation offers a great potential to treat pregnant leach solutions obtained after leaching complex sulfide ores. Industrial processes such as the PLATSOL TM, SART, and Terrafame processes are known to incorporate sulfide precipitation in

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Oxidative leaching of sulfide ores and / or concentrates ...

May 26, 2009 · KR-20120039534-A chemical patent summary.

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Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous ...

Jul 25, 2018 · Copper extraction from primary copper sulfide ore from a typical porphyry copper deposit from Antofagasta, Chile, was investigated after leaching with a chloride-ferrous media at two temperatures. The study focused on whether this chemical leaching system could be applied at an industrial scale. Leaching tests were conducted in columns loaded with approximately

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Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous ...

Copper extraction from primary copper sulfide ore from a typical porphyry copper deposit from Antofagasta, Chile, was investigated after leaching with a chloride-ferrous media at two temperatures. The study focused on whether this chemical leaching system could be applied at an industrial scale. Leaching tests were conducted in columns loaded with approximately 50

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Accelerating Copper Leaching from Sulfide Ores in Acid ...

This work investigates the effect of an agglomeration and curing pretreatment on leaching of a copper sulfide ore, mainly chalcopyrite, using mini-columns in acid-nitrate-chloride media. Ten pretreatment tests were conducted to evaluate different variables, namely the addition of nitrate as NaNO3 (11.7 and 23.3 kg/ton), chloride as NaCl (2.1 and 19.8 kg/ton), curing time (20 and

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METHOD OF OXIDATIVE LEACHING OF SULFIDE ORES AND/OR ...

A method for leaching one or more target metals from a sulfide ore and/or concentrate containing such, the method comprising the steps of: (a) Exposing the ore and/or concentrate to an aqueous solution of chlorine-based oxidising species in which the hypochlorous acid comprises at least 10 mol % of the chlorine-based oxidising species; (b) Allowing and/or

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Acid leaching of oxide–sulfide copper ore prior the ...

453 Acid leaching of oxide–sulfide copper ore prior the flotation – A way for an increased metal recovery Miroslav D. Sokić1, Vladan D. Milošević1, Velizar D. Stanković2, Vladislav Lj.Matković1, Branislav R. Marković1 1Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade, Serbia 2University of Belgrade, Technical Faculty, Bor, Serbia

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Leaching Kinetics of Antimony from Refractory Gold Ore in ...

Dec 01, 2020 · The leaching kinetics of antimony from refractory gold ore in alkaline sodium sulfide was investigated under ultrasound. The influence of factors such as stirring speed, temperature, the concentration of sodium hydroxide and sodium sulfide and particle size, was studied. The leaching kinetics has also been studied under convention and ultrasound.

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Guides For High-sulfide Gold Processing

Mar 17, 2020 · High sulfide gold ore refers to a certain gold ore with 20% -30% of gold wrapped by sulfide (mainly pyrite). Because most of the gold in high-sulfide gold ore exists in the form of sulfide-encapsulated gold, when using direct leaching process, the consumption of gold leaching agent and cost of gold leaching production will increase, and gold processing

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Hydrometallurgical Processing of Low-Grade Sulfide Ore

leaching of ores from mines and processing plants as well as waste ores from dumps and further processing by solvent extraction and electrowinning (SX/EW) [16]. Biological leaching was proved to be efficient for sulfides of Co, Ga, Mo, Ni, Zn, and Pb [16].

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Recovery of gold from sulfide refractory gold ore ...

Apr 01, 2021 · Sulfide gold ores account for a large proportion of refractory gold ores, therefore, it is very meaningful to recover gold from sulfide gold ores (Ubaldini and Vegliò, 2000, Saba, 2011, Hammerschmidt, 2016). Moreover, the major gold leaching process for extracting gold from ores and concentrates is still cyanide leaching.

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AU2011355901A1 - Method for leaching copper from copper ...

A method for leaching copper from a copper sulfide ore is provided in which the operation cost and the environmental burden are satisfactorily reduced. The method for leaching copper from a copper sulfide ore comprises supplying a first leaching liquid, which contains iron(III) ions, and a second leaching liquid, which contains iodide ions, through respective different passages to a

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US20080241024A1 - Method for Leaching Metal Sulphide ...

The invention relates to a method for the sulphate-based leaching of metal sulphide minerals, such as chalcopyrite, CuFeS 2 , containing ore in atmospheric conditions. It is beneficial for the leaching of metal sulphides that the sulphide to be leached is treated before leaching or at the beginning of leaching with a sulphide salt that is more noble than the sulphide or the

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Copper Sulfide - an overview | ScienceDirect Topics

The leaching of copper sulfide and copper oxide ores entails partial dissolution to cupric sulfate with sulfuric acid and iron sulfate. The presence of pyrites in many ore deposits, and its reaction with water and oxygen to form iron sulfate and sulfuric acid, creates an important source of acid.

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CN104404252B - A kind of method utilizing sea water to ...

The invention provides a kind of method utilizing sea water to carry out Bioleaching sulphide ore.Sea water solution pH sulphuric acid after sea water or dilution is adjusted to 1.6~1.8, then adds ferrous sulfate and make Fe 2+ Concentration reaches 3~5g/L, is added to by the solution prepared in the leaching container of sulfide mine, connects a certain amount of bacterium

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Oxidative leaching of sulfide ores and / or concentrates ...

May 26, 2009 · KR-20120039534-A chemical patent summary.

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The Leaching of a Sulphide Ore — A MÖssbauer and Sem ...

In the present investigation the leaching mechanism of a Ni-Cu-Co-sulphide concentrate has been studied in an oxidative pressure-acid medium. The ore consisted of pyrrhotite, pentlandite and chalcopyrite with gangue minerals mostly pyroxenes.

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Leaching of Primary Copper Sulfide Ore in Chloride-Ferrous ...

Jul 25, 2018 · Copper extraction from primary copper sulfide ore from a typical porphyry copper deposit from Antofagasta, Chile, was investigated after leaching with a chloride-ferrous media at two temperatures. The study focused on whether this chemical leaching system could be applied at an industrial scale. Leaching tests were conducted in columns loaded with approximately

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The leaching of sulfide iron (II) with sulfuric acid ...

Aug 25, 2015 · The leaching of iron (II) sulfate concentrate from Chaabet El Hamra, Algeria bulk sulphide ore with sphalerite concentrate in presence of sulfuric acid and hydrogen peroxide at low stirring rates (100 rpm). The influence of leaching temperature, leaching time, particle size and sulfuric acid concentration were studied. In this paper we focused our attention on the

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Experimental and theoretical study on strengthening ...

May 01, 2020 · The ore sample for the treatment ore heap was the sulfide ore used previously in the bacterial leaching desulfurization experiment, and the control group sample was the sulfide ore to which an equivalent amount of water (rather than treatment solution) had been added.

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Microbiological and geochemical dynamics in simulated-heap ...

The evolution of microbial populations involved in simulated-heap leaching of a polymetallic black schist sulfide ore (from the recently-commissioned Talvivaara mine, Finland) was monitored in aerated packed bed column reactors over a period of 40 weeks. The influence of ore particle size (2-6.5 mm and 6.5-12 mm) on changes in composition of ...

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Bioleaching of cobalt from sulfide mining tailings; a mini ...

Sep 01, 2020 · The total retention time of the mini-pilot was 247 h (approximately 10 days), resulting in 87% cobalt leaching yield. The industrial bioleaching processes treating sulfide tailings or side-streams have been reported to operate with a shorter retention time (6–7 days) with equal or higher S/L ratios (100–150 g/L).

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Recovery of Silver, Gold, and Lead From a Complex Sulfide ...

byproduct lead from a complex sulfide ore using an acid system at atmospheric pres­ sure and moderate temperature. The pro­ posed method consists of--I. Leaching a sulfide ore with an acidic FeC13 solution to form insoluble silver and lead chlorides. A portion of the zinc is also extracted: Ag2S + 2 FeC13 + 2 AgCl (A)

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AU2007219366A1 - Process to increase the bioleaching speed ...

AU2007219366A1 - Process to increase the bioleaching speed of ores or concentrates of sulfide metal species, by means of continuous inoculation with leaching solution that contains isolated microorganisms, with or without the presence of native microorganisms - Google Patents

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Copper Ore Types: Sulfides vs. Oxides | INN

Nov 09, 2020 · Copper sulfide ores are typically the most profitable copper ore type to mine. That is because they have high copper content, and the copper in them can more easily be separated from unwanted ...

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Method of gold extraction from sulphide gold-bearing ores

Method of gold extraction from sulphide gold-bearing ores. C22B3/04 - by leaching (C22B0003180000 takes precedence);; C22B11 - Obtaining noble metals. FIELD: metallurgy. SUBSTANCE: method includes leaching by solution of mixture of hydrosulphite and sodium thiosulfate and ammonium, sorption of complex thiosulfate-gold on heavy-basic anionite ...

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(PDF) LEACHING OF A ROASTED COPPER SULFIDE ORE |

LEACHING OF A ROASTED COPPER SULFIDE ORE Rosselle Kim P. Castillano, Wilfredo T. Gatdula Jr., Gin Derick L. Magno, Jhunalyn H. Parantar METE 157N: HYDROMETALLURGY LABORTORY ABSTRACT Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the

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Heap Leaching - Mineral Processing & Metallurgy

Jun 13, 2016 · Heap leaching of gold and silver ores is conducted at approximately 120 mines worldwide. Heap leaching is one of several alternative process methods for treating precious metal ores, and is selected primarily to take advantage of its low capital cost relative to other methods. Thirty-seven different heap leach operations with a total production of 198 tonnes of

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Reductive leaching of limonitic ores with hydrogen sulfide ...

A process is provided for extracting iron values as soluble ferrous salts from a limonitic ore which comprises leaching the ore in an acidic medium in the presence of a reducing agent, the reducing agent being a sulfide. Non-ferrous metal values are also extracted from the ore and they may be selectively separated from the solubilized iron salts.

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