refractory ore gold and pretreatment 2012

  • Refractory Gold Ore Treatment Methods

    2016-7-14 · Metallurgical ContentGold Leaching & Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from

  • Review Pretreatment Process on Refractory Gold Ores

    mainly about the refractory gold leaching easily through arsenic removal to expose gold, changing the composition, physic-chemical and electro-chemical properties of the ore. Currently, there are four main methods of pretreatments of refractory gold ores with As. Pretreatment options for deal-ing with refractory gold ores are illustrated in Fig ...

  • Microwave pretreatment of a double refractory gold ore

    Double refractory gold ores, such as Barrick’s Goldstrike ore, contain both pyrite and carbonaceous matter and the latter results in the loss of

  • Pretreatment Process on Refractory Gold Ores with As

    Gold ores are considered refractory if gold extractions from a conventional cyanidation process are less than 80% even after fine grinding. 1) Arsenic-bearing refractory gold ore has stones extremely difficult to deal with. In the stones, gold is locked up in arsenic mineral matrix as the form of microscopic or submicroscopic lattice.

  • Mineralogy and Pretreatment of a Refractory Gold Deposit ...

    2019-7-1 · The grade and recovery of gold in the flotation concentrates were 49.44 g/t and 33.36%, respectively. The total recovery of gold was 90.94%. The gravity–flotation combined beneficiation pretreatment process provided a feasible method for the refractory gold ore and ensured the effective recovery of gold.

  • Effect of flotation and potassium hydroxide pretreatment ...

    2021-10-1 · In this study, potassium hydroxide leaching as pretreatment before cyanide leaching of a flotation concentrate of an antimonial refractory gold-silver ore was investigated. The ore assaying 1157 g/t Ag and 3.96 g/t Au was found to be composed of predominantly quartz, barite, kaolinite, clay, mica/chlorite, and dolomite/ankerite.

  • (PDF) Cyanidation of Refractory Gold Ores: A Review

    2022-1-6 · In this paper, the effect of the oxidative pretreatment and lead nitrate addition on the cyanidation of Zarshuran refractory gold ore containing 3.32

  • Improvement of Gold Leaching from a Refractory Gold ...

    2017-7-31 · 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

  • MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY

    2020-3-24 · In this study, microbial pre-treatment of double refractory gold ore (sample A) and concentrate (sample B) was investigated using a white-rot fungus, Tramestes versicolor (ATTC 20869). Pulp density, temperature, pH and retention times were the process variables considered.

  • JROGWDLOLQJVXVLQJDVXOIXU R[LGL]LQJPL[RWURSKLF

    Hence, this refractory gold ore in its processing requires pretreatment methods before cyanidation. Some conventional pretreatment methods such as the pre-aeration method by chlorination, roasting, pressure oxidation, ultrafine grinding, and flotation-intensive leaching . are . proven to be less suitable to process refractory-type gold ores ...

  • Mineralogy and Pretreatment of a Refractory Gold Deposit ...

    2019-7-1 · The grade and recovery of gold in the flotation concentrates were 49.44 g/t and 33.36%, respectively. The total recovery of gold was 90.94%. The gravity–flotation combined beneficiation pretreatment process provided a feasible method for the refractory gold ore and ensured the effective recovery of gold.

  • (PDF) Mineralogy and Pretreatment of a Refractory Gold ...

    2019-7-1 · The gravity–flotation combined beneficiation pretreatment process provided a feasible method for the refractory gold ore and ensured the effective recovery of gold.

  • Review Pretreatment Process on Refractory Gold Ores

    mainly about the refractory gold leaching easily through arsenic removal to expose gold, changing the composition, physic-chemical and electro-chemical properties of the ore. Currently, there are four main methods of pretreatments of refractory gold ores with As. Pretreatment options for deal-ing with refractory gold ores are illustrated in Fig ...

  • Improvement of Gold Leaching from a Refractory Gold ...

    2017-7-31 · 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

  • Refractory gold reserves: Challenges and opportunities for ...

    2021-3-23 · Gold miners are facing a reserves crisis, and what is left in the ground is becoming more and more challenging to process.Refractory gold reserves, which require more sophisticated treatment methods in order to achieve oxide-ore

  • Potential pre-treatment and processing routes for

    2021-3-11 · 2.1 Microwave pre- treatment of refractory gold ores . Most of refractory gold occurs within sulphide minerals such as FeS 2 and FeAsS and are treated by roasting, pressure leaching or bacterial leaching to render the gold amenable to

  • JROGWDLOLQJVXVLQJDVXOIXU R[LGL]LQJPL[RWURSKLF

    Hence, this refractory gold ore in its processing requires pretreatment methods before cyanidation. Some conventional pretreatment methods such as the pre-aeration method by chlorination, roasting, pressure oxidation, ultrafine grinding, and flotation-intensive leaching . are . proven to be less suitable to process refractory-type gold ores ...

  • refractory gold ore mill

    Refractory Ore Gold And Pretreatment 2012 15 Views. The TON is the professional mining equipments manufacturer in the world, located in China,India, along with »More detailedget price. 4.7/5(3.7K) Process for recovering gold and silver from refractory ores.

  • Effect of nitric acid pre-treatment on the extraction of ...

    Celep et al. (2015) showed that, after nitric acid pretreatment, silver associated with arsenic and lead phases in a refractory ore was recovered with 20% improvement in

  • 难处理金矿预处理方法研究现状-《有色金属科学与工程》

    2016-5-10 · [13] BADRI R, ZAMANKHAN P. Sulphidic refractory gold ore pre-treatment by selective and bulk flotation methods[J]. Advanced Powder Technology, 2013, 24(2): 512-519. [14] ESPITIA S L M, LAPIDUS G T. Pretreatment of a refractory arsenopyritic gold ore

  • Recovery Refractory Resources - SGS

    refractory gold ore is gold-containing ore that is resistant to recovery by direct cyanidation and carbon adsorption processes. More specifically, it is an ore that has a gold recovery rate of less than 80% when direct cyanidation is applied to it. Dr Chris Fleming, senior metallurgical consultant at SGS Minerals, says: “In the

  • Microbial pre-treatment of double refractory gold ores ...

    A double refractory gold ore usually contains both sulfide minerals and carbonaceous matter and results in very low gold extraction. The micro-sized gold

  • Fungal pretreatment of sulfides in refractory gold ores ...

    title = "Fungal pretreatment of sulfides in refractory gold ores", abstract = "This study assessed the capability of the fungus, Phanerochaete chrysosporium, to decompose pyrite, arsenopyrite and a sulfide-containing flotation concentrate in an effort to develop a microbial process for pretreating refractory gold ores.

  • (PDF) Pretreatment with Ozone for Gold and Silver

    Nava-Alonso et al., in 2007, studied the pretreatment with ozone for a refractory ore with 1.67 g Au/t disseminated in pyrite. They found that for this mineral the direct addition of ozone to the ...

  • Pretreatment Process on Refractory Gold Ores with As

    1. Introduction. Gold ores are considered refractory if gold extractions from a conventional cyanidation process are less than 80% even after fine grinding. 1) Arsenic-bearing refractory gold ore has stones extremely difficult to deal with. In the stones, gold is locked up in arsenic mineral matrix as the form of microscopic or submicroscopic lattice.

  • Potential pre-treatment and processing routes for

    2021-3-11 · 2.1 Microwave pre- treatment of refractory gold ores . Most of refractory gold occurs within sulphide minerals such as FeS 2 and FeAsS and are treated by roasting, pressure leaching or bacterial leaching to render the gold amenable to

  • Process for treating refractory gold ores by roasting ...

    2000-2-1 · Microscopic gold inclusions in sulfide minerals cannot typically be extracted by conventional cyanidation. The gold ore must be pretreated to oxidize sulfide minerals associated with gold and to remove other minerals and chemical compounds that interfere in the cyanidation leaching process. The recovery of gold from refractory sulfidic-carbonaceous ores after

  • Alkaline sulfide pretreatment of an antimonial refractory ...

    2010-11-16 · This paper presents the alkaline sulfide pretreatment of an antimonial refractory gold and silver ore. In the ore, gold occurs mainly as gold-silver alloys and as associated with quartz and framboidal pyrite grains, and, to a small extent, as the inclusions within antimonial sulfides. Silver is present extensively as antimonial sulfides such as andorite. Alkaline sulfide

  • Effect of Pretreatment of Sulfide Refractory Concentrate ...

    2013-12-24 · gold in iron sulfide minerals such as pyrite and arsenopy- rite. Such deposits are called refractory gold ores due to the encapsulation of fine particles of gold in the ore host. A clear boundary between refractory and non-refractory ore in terms of gold recovery is not well defined, but several authors have pointed out that less than 60% gold

  • MICROBIAL PRE-TREATMENT OF DOUBLE REFRACTORY

    2020-3-24 · In this study, microbial pre-treatment of double refractory gold ore (sample A) and concentrate (sample B) was investigated using a white-rot fungus, Tramestes versicolor (ATTC 20869). Pulp density, temperature, pH and retention times were the process variables considered.