pretreatment of refractory ores prior to gold leaching

  • Refractory Gold Ore Treatment Methods

    Metallurgical ContentGold Leaching & Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from Antimony MineralsStibnite (Antimony Sulphide, Sb2S2)Telluride Gold Ore ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory Process Methods Where gold is associated with arsenic, antimony, tellurium, and

  • (PDF) A Preliminary Study on Nitric Acid Pre-treatment of

    A Preliminary Study on Nitric Acid Pre-treatment of Refractory Gold/silver Ores. can be suitably exploited for pre-treatment of refractory gold and silver ores prior to cyanide leaching.

  • Improved gold and silver extraction from a refractory

    The pretreatment of an antimonial refractory gold and silver ore was investigated using alkaline sulphide leaching. The ore assayed 20 g/t Au and 220 g/t Ag and contained predominantly quartz/clay and barite, and to a lesser extent, sulphides such as pyrite, stibnite, sphalerite, zinkenite (Pb 9 Sb 22 S 42) and andorite (Sb 3 PbAgS 6).The latter mineral was identified to be the most important

  • Cited by: 60
  • pretreatment of refractory ores prior to gold leaching

    Home > Iron > pretreatment of refractory ores prior to gold leaching. pretreatment of refractory ores prior to gold leaching. Conference Proceeding: TREATMENT OF A Copper minerals present difficulties during the cyanide leaching of gold ores leading to excessively high consumption of cyanide (and oxygen) coupled with low

  • Refractory Ore Gold And Pretreatment 2012

    Pretreatment Of Refractory Ores Prior To Gold Leaching. Leaching of a Refractory Gold Ore Sample from the The. A cyanidation study was conducted on a mild refractory gold ore sample from the The effects of grinding, pretreatment, lead nitrate, kerosene and cyanide prior to leaching increased the gold extraction to 90.4 per cent (leach residue at

  • Pretreatment Process on Refractory Gold Ores with As

    The process of crushing or decomposition before gold leaching is called pretreatment of refractory gold. Statistics show that, in the world, about 2/3 gold resource belongs to the difficult processing ores, and about 1/3 total output of world gold is produced from refractory gold. This proportion will further increase in future.

  • Cited by: 2
  • pretreatment of refractory ores prior to gold leaching

    pretreatment of refractory ores prior to gold leaching. Evaluation of Refractory Behaviour of Kaletaş (Turkey) Gold Ore. approach Pretreatment of the ore via roasting and ultrafine grinding prior to cyanide leaching was also examined to enhance the gold recoveries No significant

  • Hydrogen peroxide pretreatment of gold ore before leaching

    Sep 07, 2017· Hydrogen peroxide pretreatment of gold ore before leaching acid and about 1/6th hydrogen peroxide pretreatment works real well in certain ores. Hydrogen peroxide is easy to get and safe with

  • Author: Brian Stuck
  • pretreatment of refractory ores prior to gold leaching

    pretreatment of refractory ores prior to gold leaching pretreatment of refractory ores prior to gold leaching. Reducing cyanide consumption in gold recovery from finely . Abstract: Precious metals such as gold can be extracted from a refractory ore using a conventional cyanide leaching step and with reduced cyanide consumption by pre .

  • Implementation of sodium hydroxide pretreatment for

    Implementation of sodium hydroxide pretreatment for refractory antimonial gold and silver ores Article in Hydrometallurgy 108:109-114 · March 2011 with 902 Reads How we measure 'reads'

  • Gold recovery: Effect of ozonation on refractory gold ores

    leaching of refractory ores results in incomplete gold recoveries, as a solution, a pre-treatment process should be implemented. Various pre-treatment, methods includes roasting, bio- oxidation, high-pressure cyanide leaching and pressure oxidation. With the development of new ozone generators, that

  • Improved gold and silver extraction from a refractory

    The pretreatment of an antimonial refractory gold and silver ore was investigated using alkaline sulphide leaching. The ore assayed 20 g/t Au and 220 g/t Ag and contained predominantly quartz/clay and barite, and to a lesser extent, sulphides such as pyrite, stibnite, sphalerite, zinkenite (Pb 9 Sb 22 S 42) and andorite (Sb 3 PbAgS 6).The latter mineral was identified to

  • Pretreatment Of Refractory Ores Prior To Gold Leaching

    Pretreatment Of Refractory Ores Prior To Gold Leaching is a leading global manufacturer of crushing and milling equipment (Pretreatment Of Refractory Ores Prior To Gold Leaching), also supply individual (Pretreatment Of Refractory Ores Prior To Gold Leaching...) crushers and mills as well as spare parts of them.

  • pretreatment of refractory ores in gold leaching process congo

    pretreatment of refractory ores in gold leaching process congo. Pretreatment Of Refractory Ores In Gold Leaching Process Congo. BACTERIAL LEACHING AS A PRE-TREATMENT STEP FOR GOLD FOR GOLD RECOVERY FROM REFRACTORY ORES This leaching process decomposes the sulfide matrix, thus exposing the encapsulated precious metals to leaching

  • pretreatment of refractory ores prior to gold leaching

    Home >Products >pretreatment of refractory ores prior to gold leaching. Product List. C6X Series Jaw Crusher. More. European Type Jaw Crusher. More. Jaw Crusher. More. TGM Trapezium Mill. More. Raymond Mill. More. MW Series Micro Powder Mill. More. YGM Series Suspension Mill. More. HPT Hydraulic Cone Crusher. More. HST Hydraulic Cone Crusher.

  • Review Pretreatment Process on Refractory Gold Ores with As

    reach it in cyanide leaching process. 2) The gold ores with As must be broken or decomposed in the gold particles scales, so that gold is fully exposed, and then extracted with the appropriate gold leaching agent. The process of crushing or decomposition before gold leaching is called pretreatment of refractory gold.

  • Recovery Refractory Resources

    are driven by the gold recovery rate. The pre-treatment of refractory gold ore should increase the gold recovery rate in the cyanide leach process by 30-40% in order to be economical” “Large operations tend to choose roasting or pressure oxidation, while smaller operations tend to select bacterial leaching,” says Dr Fleming. “Other

  • Gold extraction Wikipedia

    These refractory ores require pre-treatment in order for cyanidation to be effective in recovery of the gold. A refractory ore generally contains sulfide minerals, organic carbon, or both. Sulfide minerals are impermeable minerals that occlude gold particles, making it difficult for the leach solution to form a complex with the gold.

  • Developments in the pretreatment of refractory gold

    Developments in the pretreatment of refractory gold minerals by nitric acid D.-X. LI College of Environmental Science and Engineering, China The paper covers many literature reports of processes using nitrogenous species as an oxidant for processing refractory gold ores, especially development in the pretreatment of refractory gold

  • Treatment of Refractory Gold Ores SpringerLink

    Abstract. Problem ores that yield low (say less than 80%) gold recovery by cyanidation when “normally ground” are defined as refractory.The term, as well as the technical methods used to treat such ores, are relatively new.

  • US5147617A Process for recovery of gold from gold ores

    A process for recovering gold from gold-bearing ores includes the steps of forming a slurry of ground ore and treating the ore with an oxidizing and complexing agent such as hydrogen sulfide or a sulfide salt. A chelating agent, SO 2,air, and an anion exchange resin are added to the slurry to subject the ore to a simultaneous sulfurous acid leaching and anion exchange resin

  • Pressure leach of refractory auriferous ores prior to

    AU4789185A Pressure leach of refractory auriferous ores prior to cyanidation, activated carbon or ion-exchange resin for gold recovery Google Patents Pressure leach of refractory auriferous ores prior to cyanidation, activated carbon or ion-exchange resin for gold

  • Treatment of Refractory Gold Ores SpringerLink

    Abstract. Problem ores that yield low (say less than 80%) gold recovery by cyanidation when “normally ground” are defined as refractory.The term, as well as the technical methods used to treat such ores, are relatively new.

  • US5147617A Process for recovery of gold from gold ores

    A process for recovering gold from gold-bearing ores includes the steps of forming a slurry of ground ore and treating the ore with an oxidizing and complexing agent such as hydrogen sulfide or a sulfide salt. A chelating agent, SO 2,air, and an anion exchange resin are added to the slurry to subject the ore to a simultaneous sulfurous acid leaching and anion exchange resin adsorption step

  • Pressure leach of refractory auriferous ores prior to

    AU4789185A Pressure leach of refractory auriferous ores prior to cyanidation, activated carbon or ion-exchange resin for gold recovery Google Patents Pressure leach of refractory auriferous ores prior to cyanidation, activated carbon or ion-exchange resin for gold recovery Info

  • Improvement of Gold Leaching from a Refractory Gold

    energy consumption. As a result, proper pretreatments are necessary to improve the leaching of gold from these refractory gold ores [5,6]. The pretreatment of oxidative roasting has always been one of the most extensively used methods in China attributing to its mature technique, high efficiency, energy conservation, etc. [7,8] Effective

  • BACTERIAL LEACHING AS A PRE-TREATMENT STEP FOR

    BACTERIAL LEACHING AS A PRE-TREATMENT STEP FOR GOLD RECOVERY FROM REFRACTORY ORES In this article, pre-treatment such as bio-leaching before cyanidation is discussed as an alternative technique to treat refractory gold ores containing pyrite and arsenopyrite. There are two methods of

  • Published in: Physicochemical Problems of Mineral Processing · 1998Authors: A Ozkan · Salih Aydogan · Unal Akdemir
  • Pretreatment of a refractory arsenopyritic gold ore using

    Mar 01, 2015· Read "Pretreatment of a refractory arsenopyritic gold ore using hydroxyl ion, Hydrometallurgy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • pretreatment of refractory ores prior to gold leaching

    pretreatment of refractory ores prior to gold leaching. pretreatment of refractory ores prior to gold leaching. pretreatment of refractory ores prior to gold and effects of the microwave pretreatment on cyanide leaching are investigated The Read more . Gold extraction Wikipedia.

  • GOLD RECOVERY OF REFRACTORY SULFIDE CONCENTRATES

    reagent on cyanidation of refractory gold ore. Cyanide leaching of the concentrate was performed at 20%-w/w of solid (500 gram of refractory sulfide gold ore concentrate) in a 2.5-liter glass reactor with aeration and stirred at 250 rpm. Leach solutions were prepared using deionized-distilled water at the prescribed concentration of reagents.

  • pretreatment of refractory ores prior to gold leaching

    pretreatment of refractory gold ore with microwaves. Pretreatment Of Refractory Ores Prior To Gold Leaching. Gold ore which is difficult to concentrate often referred to gold or refractory gold ore, which use conventional cyanide process cannot effectively extract most of the gold ore.

  • Characterization of refractory behaviour of complex gold

    These findings highlight the practical importance of diagnostic leaching for the understanding of the refractory characteristic of such an ore and for the identification of possible pretreatment options to overcome its refractoriness prior to cyanide leaching. Key words: gold and silver ores; refractoriness; characterization; diagnostic leach

  • The reasons of gold refractory, Gold ore classification

    Nov 28, 2016· The reason of the gold mineral refractory There are so many types of reasons that caused the difficulty of gold ore processing, including physical element, chemical element, and mineralogical element.

  • (PDF) 24-Alkaline sulphide pretreatment JOM ibrahim alp

    To improve the their poor response to cyanide leach- extraction of gold and silver from The refractoriness of gold ores arises refractory ores, pretreatment of the ing for the extraction of Ag.12,13 Celep principally from their inherent miner- ore using a suitable method prior to et al.14,15 reported that pretreatment alogical properties.

  • pretreatment of refractory ores in gold leaching process congo

    pretreatment of refractory ores in gold leaching process congo; pre-treatment of refractory gold ore should increase the gold recovery rate in the cyanide leach process by 30-40% in order to be economical”. These types of ores require pretreatment prior to cyanidation. Options for pretreatment include the following processes

  • Heap Leaching Refractory osteriadellortolano

    LimeAssisted Cyanide Leaching of Refractory Gold Ores from Ajialongwa Mine Kaibin Fu, Shu Chen, Zhen Wang, Junhui Xiao, and Deqiang Luo Abstract Heap leaching is a