Pretreatment Method Of Gold Ore

  • WO2014155753A1 Method for pretreatment of gold ore

    Provided is a method for pretreatment of gold ore in order to leach out gold from gold ore containing pyrite, with which it is possible to suppress the generation of sulfide dioxide and to improve the leaching rate of gold.

  • Author: 和浩 波多野, 由樹 青砥
  • Review Pretreatment Process on Refractory Gold Ores with As

    Pretreatment Process on Refractory Gold Ores with As Xin-yuan NAN, Xin CAI* and Jun KONG School of Electrical Engineering, Xinjiang University, 1230 Yan’an Road, Tianshan District, Urumqi, 830047 P. R. China.

  • Pretreatment Process on Refractory Gold Ores with As

    It is an effective method for the carbon refractory gold ore and is used in preprocess of high arsenic gold ore. Beijing General Research Institute of Mining and Metallurgy has studied a refractory gold ore bearing high arsenic in Guizhou. It used water chlorination to leach gold and gold leaching rate reached 91.48%.

  • Cited by: 2
  • WO2014155752A1 Method for pretreatment of gold ore

    Provided is a method for pretreatment of gold ore in order to leach out gold from gold ore containing pyrite using wet treatment, and with which it is possible to suppress the generation of sulfur dioxide and to improve the leaching speed of gold. This method for pretreatment of gold ore contains a step in which at least 60% of the pyrite (FeS 2 ) in gold ore is converted into pyrrhotite represented by the following

  • Author: 和浩 波多野, 由樹 青砥
  • Gold extraction Wikipedia

    Gold extraction refers to the processes required to extract gold from its ores. This may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore.

  • Microbial Pretreatment of Refractory Gold Ore Xinhai

    The common pretreatment methods for gold sulfide gold deposit are oxidizing roasting method, curing method, acid pressure oxidation, bacterial oxidation method, nitric acid oxidation method, etc. 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.

  • Carbonaceous Gold Ore Treatment Method

    Flotation. The simplest method of treating a carbonaceous ore is the method described by R. W. Nice (1971) at the McIntyre Porcupine Mine where the carbon, which contains very little gold, is floated off and discarded.

  • ECONOMICS OF REFRACTORY GOLD ORE PROCESSES

    ECONOMICS OF REFRACTORY GOLD ORE PROCESSES John E. Litz and R. Wayne Carter 119th TMS Annual Meeting February 18-22, 1990 Hazen Research, Inc. 4601 Indiana Street Golden, Colorado 80403 Abstract Refractory gold ore pretreatment processes continue to receive much attention. This paper compares the relative economics of treating ores by oxygen pressure oxidation, roasting and

  • Sulphidic refractory gold ore pre-treatment by ScienceDirect

    In this paper, the selective and bulk flotation methods are considered as primary sulphidic refractory gold ore pre-treating options. The results show that it is impractical to remove arsenic (As) and antimony (Sb) from downstream processes by using selective flotation. It was observed that 22% of total Sb and 31.1% of As remained in the final tailings. In this case, 24% of gold was recovered in the initial stage

  • Cited by: 6
  • Microwave pretreatment of a double refractory gold ore

    In this paper, microwave pretreatment of a double refractory gold ore was investigated as an alternative method and the results are compared to conventional roasting. 3. Experimental3.1. Ore sampleA low-grade sample of a double refractory gold ore was obtained from Barrick Gold Strike. Two kilograms of the ore was mixed with 850 ml of tap water and ground for an hour in a mild steel rod mill with

  • Cited by: 88
  • Alkaline leaching pretreatment and cyanidation of arsenical gold ore

    Alkaline leaching pretreatment and cyanidation of arsenical gold ore from the Carlin-type Zarshuran deposit Ehsan Bidari and Valeh Aghazadeh Department of Mineral Processing, Faculty of Mining Engineering, Sahand University of Technology, Tabriz, Iran

  • Improved gold and silver extraction from a refractory antimony ore

    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).

  • Research status of carbonaceous matter in carbonaceous gold ores

    The pretreatment methods of carbonaceous gold ores were introduced, including high temperature roasting, bio-oxidation, chemical oxidation, competitive adsorption, barrier inhibition and microwave roasting.

  • Implementation of sodium hydroxide pretreatment for

    Alkaline pretreatment of a refractory gold–silver ore containing antimony minerals such as stibnite, andorite (Sb3PbAgS6) and zinkenite (Pb9Sb22S42) was tested using sodium hydroxide in order to

  • Developments in the pretreatment of refractory gold minerals by

    processing refractory gold ores, especially development in the pretreatment of refractory gold minerals by nitric acid. These processes include the high-pressure and the atmospheric-pressure

  • Hypochlorite Pretreatment of a Low Grade Carbonaceous Gold Ore

    Hypochlorite pretreatment of a refractory carbonaceous gold ore showed promise as a method for oxidizing sulfidic and carbonaceous materials prior to conventional cyanide heap leaching. However, previous studies showed hypochlorite consumption is high and gold extraction is proportional to

  • Pretreatment Process on Refractory Gold Ores with As

    24-06-2017· Therefore, pretreatment of arsenic-bearing refractory gold has an extremely important significance. 3) In recent years, researches are 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.

  • Evaluation of physical and chemical pre-treatment methods

    silver ores or silver in gold ores often respond poorly to the chemical pre treatment processes leading to low silver extractions compared with gold (Zhou, 2010; Celep et al., 2009).

  • Effect of Pretreatment of Sulfide Refractory Concentrate with

    ore in terms of gold recovery is not well defined, but several authors have pointed out that less than 60% gold recovery by direct cyanide leaching, after fine grinding

  • pretreatment agitation tank of enhanched alkaline leaching

    11-02-2013· Gold Mining Process Development » Denver Mineral Engineers. Agitated tank leaching; Lime/caustic pretreatment; Today, cyanide leaching is the method of choice for the recovery of most

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  • pretreatment of refractory ores prior to gold leaching

    Pretreatment of sulfide refractory gold ore by biooxidation in coarse-crushed ore heaps, prior to leaching the gold in a separate heap, is a promising new technology that is about to be commercialized.

  • Improvement of Gold Leaching from a Refractory Gold

    minerals Article Improvement of Gold Leaching from a Refractory Gold Concentrate Calcine by Separate Pretreatment of Coarse and Fine Size Fractions

  • Gold Extraction Methods From Ore jxscmachine

    Cyanide gold extraction process, the process of extracting gold with cyanide is called cyanidation gold extraction, which is the main method for extracting gold from ore or concentrate. Basic Gold Cyanide Process Steps

  • Overview of pretreatment technique of refractory gold ores--《GOLD

    The characteristics of refractory gold ores and the principles of selecting pretreatment program are introduced.The development and new trends of the methods of roast,pressure oxidation and bio oxidation in recent years are summarized.

  • A two-stage bacterial pretreatment process for double refractory gold ores

    The effect of bacterial pretreatment on gold recovery was determined by cyanide leaching. Cyanidation was conducted on 100 g each of ore after biooxidation of sulfides and after both biooxidation of sulfides and destruction of CM. Samples were leached at a pulp density of 40% by weight for 24 h at pH 10.5–11. The pH was adjusted using 0.1 M sodium hydroxide and cyanide strength was 10 kg/t. The dissolved

  • pretreatment of refractory sulphide gold ores and concentrates

    Methods of Processing of the Gold-Containing Methods of Processing the Gold-Containing Refractory Sulfide Ores and the Concentrates 69 Bull.

  • Minerals Free Full-Text Improvement of Gold Leaching from a

    Refractory gold ores have increasingly been the main source of gold production with the exhaustion of amenable gold ores. Of the 2630 tons of total world gold production in 2011, about 25% was produced from refractory gold deposits, and of the top 20 gold operations in 2011, eight were processing refractory ores [ 1 ].

  • Ozone: Science & Engineering Pretreatment with Ozone for Gold

    ozone is proposed as oxidative pretreatment for gold and silver refractory ores with the aim of modifying the pyritic matrix and thus exposing the precious metals to cyanide.

  • pretreatment of refractory gold ore with microwaves

    Study on pretreatment of refractory gold ore by microwave On Jun 1, 2009 L. Wei (and others) published: Study on pretreatment of refractory gold ore by microwave roasting method

  • Pretreatment Of Refractory Ores In Gold Leaching Process Congo

    gold ore processing methods pdf MTM Crusher. Recovery Problems in Gold Ore Processing with Pretreatment Process on Refractory Gold Ores In order to recover gold using the cyanide leaching process, ore Read more . APPLICATION OF THE BIOX PROCESS TO THE PRETREATMENT OF Application of the BIOX Process to the Pretreatment of Refractory cyanidation treatment of

  • Ozone: Science & Engineering Pretreatment with Ozone for Gold

    ozone is proposed as oxidative pretreatment for gold and silver refractory ores with the aim of modifying the pyritic matrix and thus exposing the precious metals to cyanide.

  • (PDF) Evaluation of physical and chemical pre-treatment methods

    In fact, silver ores or silver in gold ores often respond poorly to the chemical pre treatment processes leading to low silver extractions compared with gold (Zhou, 2010; Celep et al., 2009). Gold and silver are readily extracted in dilute solutions of cyanide in the presence of air/oxygen. Eq. 1 and 2 express the dissolution reactions of native silver and argentite/acanthite (Ag 2S), respectively (Fleming, 1992;

  • Effect of Pretreatment of Sulfide Refractory Concentrate with

    For extraction of gold from refractory ores or concentrate, in which gold is surrounded or covered by iron sulfide minerals, mainly arsenopyrite and pyrite, mineral oxidative pretreatment is essential to oxidize sulfides and to expose gold to the leaching solution. Pyrometallurgical oxidation by roasting is under environmental restrictions [1]. Therefore, hydrometallurgical methods are preferred as they have

  • Published in: Advances in Chemical Engineering and Science · 2013Authors: Alejandro Valenzuela Valenzuela · Jesus L Valenzuela · Jose R PargaAffiliation: Universidad De Sonora
  • Improving Gold Recovery from Artificial Preg-Robbing Ore by Pre

    Pretreatment of preg-robbing gold ore can also be performed by using an adsorbent that has high adsorption strength to aurocyanide complex anion, such as ion exchange resins s.

  • Hydrogen peroxide pretreatment of gold ore before leaching YouTube

    07-09-2017· I have been experimenting with different ways to deal with the sulphide locked gold situation. One way I've been having luck is a presoak in Hydrogen Peroxide.

  • Author: Brian Stuck
  • Gold Ore Pretreatment

    Provided is a method for pretreatment of gold ore in order to leach out gold from gold ore containing pyrite using wet treatment, and with which it is possible to Get Price Bioleaching of Gold Ore Essay 3062 Words

  • -pretreatment of refractory gold ore with microwaves-

    pretreatment of refractory gold ore with microwaves. microwave pretreatment of a refractory goldMicrowave pretreatment of a double refractoryRead "Microwave pretreatment of a double refractory gold ore, Minerals Engineering" on DeepDyve, the largest online pretreatment of refractory gold ore with microwaves ,gold refractory ores microwave

  • CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF REFRACTORY SULFIDE GOLD

    For extraction of gold from the refractory ores in which gold is surrounded by sul- fide minerals, oxidative pretreatment of the ore is essential to oxidize the sulfides and expose gold.

  • Published in: Physicochemical Problems of Mineral Processing · 2013Authors: Mehdi Ghobeiti Hasab · Fereshteh Rashchi · Shahram RayganAffiliation: University of Tehran
  • BACTERIAL LEACHING AS A PRE-TREATMENT STEP FOR GOLD RECOVERY

    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 bacterial leaching, namely stirred reactor bio-leaching and bio-heap leach processes. The examples of industrial applications and economics of

  • Published in: Physicochemical Problems of Mineral Processing · 1998Authors: A Ozkan · Salih Aydogan · Unal Akdemir
  • Alkaline Oxidative Leaching of Gold-Bearing Arsenopyrite Ores

    Alkaline Oxidative Leaching of Gold-Bearing Arsenopyrite Ores By P. Bhakta, J. W. Langhans, Jr., and K. P. V. Lei UNITED STATES DEPARTMENT OF THE INTERIOR . Mission: As the Nation's principal conservation agency, the Department ofthe Interior has respon­ sibility for most of our nationally-owned public lands and natural and cultural resources. This includes fostering wise use of our land and water