leaching of refractory copper ore

leaching of refractory copper ore

  • Response Surface Methodology for

    Response surface methodology is used to optimize the leaching process for refractory flotation copper tailings The proportion of the refractory combination oxide copper (chrysocolla) is 6484% At present few studies have examined the leaching of chrysocolla In this study we examine the effects of several variables including the amount of concentrated sulfuric acid leaching temperature

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  • Arsenic bioleaching in medical realgar ore and arsenic

    maximum arsenic leaching ratios of realgar and arsenic bearing refractory gold ore in the absence of any bacterium were only 28 and 112 % respectively Conclusion Arsenic leaching ratio of realgar and refractory gold ore can be enhanced significantly in the presence of

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  • Bioleaching Introduction Methods Application

    Bioleaching Introduction Methods Application Copper Microorganisms and Processes! Introduction to Bioleaching Leaching process was first observed in pumps and pipelines installed in mine pits containing acid water This process was later on employed for recovering metals from ores containing low quantity of the metal Presently certain metals from sulfide ores and other ores are

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  • ALTA Gold 2012 E Doc

    ore reserves Refractory gold ores are those that do not yield high gold recoveries in conventional cyanide leaching circuits even when the ore is finely ground The cause of low gold recoveries can be either through the presence of naturally occurring preg robbing carbonaceous materials or

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  • CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF REFRACTORY

    Chloridehypochlorite oxidation and leaching of refractory sulfide gold concentrate 65 Fig 3 Particles size analysis of gold concentrate Fig 4 XRD analysis of gold concentrate obtained by flotation Table 1 Major elements composition of the ore and floated concentrate

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  • Gold extraction

    Leaching characteristics of copper refractory ore in sulfate media Article in Minerals and Metallurgical Processing 28(4):208 214 · November 2011 with 51 Reads How we measure 'reads'

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  • Heap leaching of copper by BHP Chile Inc AU

    WO 2015/059551 PCT/IB2014/002193 1 HEAP LEACHING OF COPPER BACKGROUND OF THE INVENTION This invention relates to a hydrometallurgical method of heap leaching copper from principally chalcopyrite or chalcopyrite mixed with refractory oxide minerals such as copper manganese oxides ((Cu Mn Co Ni Ca Zn Fe)x(O OH)x) and secondary sulphide minerals such as chalcocite

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  • The reasons of gold refractory Gold ore

    11/28/2016· I 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

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  • Pressure Leaching Of Refractory Silver Ore

    pressure leaching of refractory silver ore Thiosulphate leaching of silver appears to be limited essentially to silver sulphide with complex refractory silver minerals having received less attention This comprehensive study was designed to investigate various aspects of thiosulphate leaching of a refractory arsenical silver ore

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  • RECOVERY OF COPPER FROM OXIDE COPPER ORE BY FLOTATION

    RECOVERY OF COPPER FROM OXIDE COPPER ORE BY FLOTATION AND LEACHING Kiraz Emirhan MS Department of Mining Engineering Supervisor Prof Dr Mustafa Ümit Atalay December 2014 65 pages The aim of this study was the recovery of copper from the oxide copper ore by froth flotation and agitating sulphuric acid (H 2 SO 4) leaching

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  • Copper beneficiation process Yantai Jinpeng

    Copper ore divides into ore sulfide ore oxide and mixing ore according to its oxide rate The main process for copper ore is flotation for refractory mixed copper ore and refractory oxide ore normally use hydrometallurgy process It is a high technological enterprise that integrated research manufacture sales and service The company has multiple subsidiaries such as Mineral

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  • Copper extraction

    7/10/2017· Ammoniacal thiosulfate leaching of refractory oxide gold ore was investigated According to X ray fluorescence and fire assay analyses the ore contained about 3301 wt% Si 853 wt% Al 726 wt% K 300 wt% Fe and 280 ppm Au

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  • Diagnostic Leaching for Refractory Gold Ores

    A diagnostic leach test can be very useful to qualitatively assess how gold occurs within the ore and the extent to which it may be refractory Several different permutations of diagnostic leach tests depend on specific objectives but they generally involve the sequential leaching of a gold ore sample with progressively stronger reagents producing a qualitative assessment of the gold

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  • Extraction of Copper from a Refractory Copper

    The study aimed to extract copper from copper oxide ores in which copper minerals had a complex association and dissemination with gangue minerals in the form of fine grain by catalytic oxidation acid leaching Based on the research on the properties of the material and lots of experiments the leaching process was performed The optimum parameters of leaching process were determined as

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  • Diagnostic Leaching for Refractory Gold Ores

    A diagnostic leach test can be very useful to qualitatively assess how gold occurs within the ore and the extent to which it may be refractory Several different permutations of diagnostic leach tests depend on specific objectives but they generally involve the sequential leaching of a gold ore sample with progressively stronger reagents producing a qualitative assessment of the gold

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  • Ammonia Leaching Study on Refractory

    Ammonia leaching research is carried out on a certain oxidised copper ores The effects of oxidized copper ores which came from Yunnan Province were studied in laboratory in order to find out the optimum leaching conditions under normal temperature and pressure The ores belonged to typical high binding rate minerals The optimum conditions obtained were as follows granding fineness about 90%

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  • microbial ore leaching x264

    4/3/2014· microbial ore leaching x264 Ronay Bingöl Loading Unsubscribe from Ronay Bingöl? Ore to More (The History of Copper) Duration 6:00 Vérité Inc 75 779 views

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  • Ultrasound intensified Leaching of Gold from a Refractory Ore

    Ultrasound intensified Leaching of Gold from a Refractory Ore Gengwei ZHANG 1 2 3) Shixing WANG 1 2 3) The effect of ultrasound on the acid leaching of copper from copper converter slag 15) ammonium leaching of zinc from calamine16) and dissolution of colemanite in sulphuric acid 17)

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  • Producing Copper Nature's Way Bioleaching

    Further through the use of biooxidation it is now possible to leach many of the copper sulfide minerals present in the ore While chalcopyrite remains refractory to ambient temperature bioleaching other copper sulfide minerals the secondary sulfide minerals such as chalcocite covellite bornite etc are leachable by today's technology

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  • pretreatment of refractory ores prior to gold

    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

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  • Leaching characteristics of copper refractory

    Acid leaching Copper refractory ore (CRO) Gangue acid consumption (GAC) Kinetics Paper number MMP 10 036 Discussion of this peer reviewed and approved paper is invited and must be submitted to SME Publications Dept prior to May 31 2012

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  • leaching of refractory copper ore

    Ammonia Leaching Study on Refractory Oxidised Copper Ores Ammonia leaching research is carried out on a certain oxidised copper ores The effects of oxidized copper ores which came from Yunnan Province were studied in laboratory in order to find out the optimum leaching conditions under normal temperature and pressure

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  • Processing of Konkola copper concen trates and Chingola

    about 6 million ton ore per year with copper production rising from the current 50 000 ton per year to approximately 220 000 ton per Processing of Konkola copper concen trates and Chingola refractory ore in a fully integrated hydrometallurgical pilot plant circuit by RM Whyte* N Schoeman and KG Bowes Synopsis

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  • WO2012078020A2 Method for leaching

    1 Process for the leaching of silver and copper from ores refractory mineral phases containing iron and sulfur characterized in that the oxidative leaching prior to said ore or one or more minerals are subjected to a reduction in an acid medium containing complexing agents sulfide and / or ferrous ions with a reducing agent or in the cathode compartment of an electrolytic chamber; in which

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  • Treatment of a Copper Rich Gold Ore by

    Treatment of a Copper Rich Gold Ore by Ammonia Assisted Cyanide Leaching a reduction roast using salt and coal of the refractory copper silicate ore in a fluid bed roaster to reduced the

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  • A HEAP LEACH FEASIBILITY STUDY FOR MIMBULA REFRACTORY

    year 2014 15 was 116 000 t KCM plans to scale up the copper production from refractory copper ore via the proposed heap leaching The heap leach feasibility tests work are underway on stockpile 12 of the Chingola refractory ore (SP12) but other ore reserves such as

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  • Chlorination Leaching of Refractory Ores

    Chlorination leaching of floatation concentrate could be a route for treatment of refractory ores instead of roasting BIOB or POX some companies are also testing fine grinding and oxygen injection using shear reactors in alkaline cyanide systems Direct leaching of ores

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  • Diagnostic Leaching for Refractory Gold Ores

    A diagnostic leach test can be very useful to qualitatively assess how gold occurs within the ore and the extent to which it may be refractory Several different permutations of diagnostic leach tests depend on specific objectives but they generally involve the sequential leaching of a gold ore sample with progressively stronger reagents producing a qualitative assessment of the gold

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  • Refractory Copper Ore from Nchanga

    The Nchanga Cu Co ore deposit of the Zambian Copperbelt is hosted in Neoproterozoic siliciclastic carbonate sedimentary rocks and it consists of two orebodies the Lower Orebody (shale) and the Upper Orebody (arkose) Refractory Cu ores present in the Upper Orebody comprise 150 Mt with average 087% Cu and are characterized by inadequate recovery of copper by leaching

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  • copper extraction refractory gold processes

    The kinetics of both gold and copper leaching using Leaching characteristics of copper refractory ore in sulfate ery can be achieved by selecting leaching conditions whereby gangue acid consumption (GAC) of copper in the AL process is slower of gold from refractory

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  • leaching of refractory copper ore podlahy

    Extraction of Copper from a Refractory Copper Oxide Ore by Under such a condition the leaching efficiency of 9015% was achieved which provided a way to improve leaching efficiency of copper for refractory copper oxide contained some copper sulphide using catalytic oxidation acid leaching

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  • Advances in high temperature heap leaching of refractory

    in the ore is therefore of primary importance as well as the need to generate suitable Advances in high temperature heap leaching of refractory copper sulphide ores by SW Robertson* PJ van Staden* and A Seyedbagheri* Synopsis Acid heap leaching has been extensively applied to the processing

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  • Thiosulphate leaching of silver from an arsenical

    Thiosulphate leaching has received particular attention in recent years as an environmentally benign alternative to cyanide leaching In this study thiosulphate leaching combined with ultra fine grinding (UFG) was studied for silver extraction from an arsenical refractory ore

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  • Copper Ore Hydrometallurgy and Pressure

    Copper hydrometallurgy is a branch of metallurgy method to extract copper directly from those difficult to concentrate copper oxide ore Traditional copper hydrometallurgy process typically consists of atmospheric leaching solvent extraction (SX) and electro winning (EW) It can produce either copper cathode or copper sulphate crystal

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  • Copper Leaching from Refractory Flotation Tailings

    copper sulfide and free oxidation copper in the raw ore were recycled by flotation but the other refractory copper oxides mainly the combination copper oxide were not thoroughly recycled and the majority were lost in the tailings As is typical for flotation tailings containing silicate gangue minerals high temperature leaching was used

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  • leaching of refractory copper ore

    Processing of Konkola copper concen trates and Chingola trates and Chingola refractory ore in a with the availability of oxide ores and an existing leach plant at Nchanga present an attractive set of advantages for the KCM pressure leaching option Against this however is the refractory copperbearing micas in the CRO ore at elevated

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  • PRESSURE LEACHING OF SHALE ORE IN OXYGENATED

    Key words pressure leaching shale ore copper INTRODUCTION Pressure hydrometallurgy has an extensive application particularly in processing of zinc nickel and copper sulphides and in pretreatment of refractory gold ores in which gold is finely dispersed in sulphidic lattice Especially the pressure

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  • Heap Leaching Mineral Processing Metallurgy

    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 gold per year (6 150 000 ounces

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