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treatment of refractory ores

May 08 1990 · Refractory carbonaceous sulfide ores are treated in a manner so as to improve gold recovery by a treatment in specific combination of steps whereby the ore is treated with chlorine after pretreatment and before cyanidation the particular steps in the treatment of the ore have been found to be necessary as the conventional pretreatment will not improve the yields on any economic basis


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Treatment of Refractory Gold Ores  XPS
Treatment of Refractory Gold Ores XPS

Treatment of Refractory Gold Ores Extractive Metallurgy Once the cause has been identified there are a number of alternatives for treating the ore Firstly the gold can be made more amenable to cyanidation by ultrafine milling followed by a hot atmospheric leach –the Albion Process

CarboninChlorine Treatment of Refractory Gold Ores
CarboninChlorine Treatment of Refractory Gold Ores

The US Department of Interior Bureau of Mines is investigating the treatment of refractory gold ores Chlorination in the treatment of refractory gold ores is applicable in many lowgrade gold operations When usable this treatment provides an economic means of consuming sulfides and deactivating disseminated organic carbon Chlorination however is a pretreatment technique that requires

Treatment of carbonaceous refractory gold ores
Treatment of carbonaceous refractory gold ores

Refractory ore treatment by this method normally gives gold extraction in excess of 95 Autoclave leaching of refractory gold ores on an industrial scale started in the 1980s because of the high gold price and because pressure oxidation is an environmentally accepted alternative to roasting

Supercritical Water Treatment of Refractory Gold Ores
Supercritical Water Treatment of Refractory Gold Ores

Developing a single simple treatment that will handle both pyritic and carbonaceous types of refractory gold ores remains an enticing goal supercritical solvent extraction may provide a

ALTA Gold 2012 EDoc
ALTA Gold 2012 EDoc

options for treating more complex orebodies as the less refractory ores become depleted Demonstration of economic treatment options allows gold companies to maintain and increase their ore reserves Refractory gold ores are those that do not yield high gold recoveries in conventional cyanide

Application of the Albion Process for the Treatment of
Application of the Albion Process for the Treatment of

Sep 11 2018 · Core and Glencore present the Application of the Albion Process for the Treatment of Refractory Ores at Extraction 2018 and MILLOPS 2018 VIEW THE 2018 PRESENTATION FROM EXTRACTION 2018 ABOVE or DOWNLOAD HERE

PDF Recent advances in the treatment of refractory gold ores
PDF Recent advances in the treatment of refractory gold ores

This review is essentially an overview of the pretreatment processes for the refractory gold ores available in the recent literature When gold is finely disseminated in sulphides arsenosulphides

Gold extraction  Wikipedia
Gold extraction Wikipedia

Pretreatment options for refractory ores include Roasting Biooxidation such as Bacterial oxidation Pressure oxidation Albion process

Refractory Gold  Mining  SGS
Refractory Gold Mining SGS

The other parameter that SGS experts consider when designing refractory gold treatments is whether or not to preconcentrate the goldbearing ore This is usually done by flotation of arsenopyrite pyrite or other goldbearing sulfides To be economically justifiable preconcentration should meet two objectives

Treatment of Alaskan refractory gold ores updating data
Treatment of Alaskan refractory gold ores updating data

TREATMENT OF ALASKAN REFRACTORY GOLD ORES UPDATING DATA FOR ECONOMIC DEVELOPMENT OF REGIONAL GOLD DEPOSITS The US Bureau of Mines investigated treatment of gold and silver refractory ores and concentrates that respond poorly to conventional cyanidation techniques due to the complex mineralogy of the ore

Ultra Fine Grinding  A Practical Alternative to Oxidative
Ultra Fine Grinding A Practical Alternative to Oxidative

Ellis Kalgoorlie Consolidated Gold Mines Kalgoorlie WA Abstract Since early 2001 Kalgoorlie Consolidated Gold Mines KCGM has successfully operated an ultra fine grinding UFG circuit to supplement its roaster capacity for the treatment of the refractory gold flotation concentrate

The Treatment Of Refractory Ores
The Treatment Of Refractory Ores

apparatus for the treatment of refractory ores Quantities of refractory ores treated by this process are said to have demonstrated that the whole of the gold in the ore is extracted The successful outcome of these trials is stated to have resulted in the AngloFrench Exploration Co acquiring the right to work the process on the various gold fields of South Africa

CarboninChlorine Treatment of Refractory Gold Ores
CarboninChlorine Treatment of Refractory Gold Ores

The US Department of Interior Bureau of Mines is investigating the treatment of refractory gold ores Chlorination in the treatment of refractory gold ores is applicable in many lowgrade gold operations When usable this treatment provides an economic means of consuming sulfides and deactivating disseminated organic carbon Chlorination however is a pretreatment technique that requires

Treatment of Alaskan refractory gold ores updating data
Treatment of Alaskan refractory gold ores updating data

treatment of alaskan refractory gold ores UPDATING DATA FOR ECONOMIC DEVELOPMENT OF REGIONAL GOLD DEPOSITS The US Bureau of Mines investigated treatment of gold and silver refractory ores and concentrates that respond poorly to conventional cyanidation techniques due to the complex mineralogy of the ore

Review Pretreatment Process on Refractory Gold Ores
Review Pretreatment Process on Refractory Gold Ores

Several different classes of process options for pretreating refractory ores are considered These options include roasting oxidation wet chemical treatment bacterial peroxidation and other pre treatments such as eliminating arsenic in vacuum volatile smelting segregation of roasting electrochem

types of refractory gold
types of refractory gold

Refractory Gold Ore Treatment Methods Where gold is associated with arsenic antimony tellurium and certain other minerals it is often only partly soluble in cyanide solution The difficulty is usually more of a physical than a chemical one but special methods of treatment may be required

US4923510A  Treatment of refractory carbonaceous sulfide
US4923510A Treatment of refractory carbonaceous sulfide

Refractory carbonaceous sulfide ores are treated in a manner so as to improve gold recovery by a treatment in specific combination of steps whereby the ore is treated with chlorine after pretreatment and before cyanidation the particular steps in the treatment of the ore have been found to be necessary as the conventional pretreatment will not improve the yields on any economic basis

PDF Recent advances in the treatment of refractory gold ores
PDF Recent advances in the treatment of refractory gold ores

In this paper the selective and bulk flotation methods are considered as primary sulphidic refractory gold ore pretreating options The

John T Boyd Company – Refractory Ore Specialist
John T Boyd Company – Refractory Ore Specialist

During the period from 1994 to 2009 the percentage of world gold production from refractory gold ores increased from 5 to over 10 Examples of Refractory Ore treatment include Pressure oxidation of flotation concentrates Pressure oxidation of whole ore Tank biooxidation of flotation concentrates

Recovery Refractory Resources
Recovery Refractory Resources

refractory resources Refractory gold ore needs pretreatment for cyanidation to be effective in gold recovery Ailbhe Goodbody looks at the advantages and disadvantages of the most common pretreatment options and speaks to some companies that offer or use the processes A refractory gold ore is goldcontaining ore that is resistant to

US4902345A  Treatment of refractory carbonaceous and
US4902345A Treatment of refractory carbonaceous and

US Pat No 4552589 discloses a process for recovering precious metals from a refractory ore which comprises subjecting a partially oxidized slurry of the ore to a carbonincyanide leach treatment to separate the precious metals

Ultra Fine Grinding  A Practical Alternative to Oxidative
Ultra Fine Grinding A Practical Alternative to Oxidative

Ultra Fine Grinding A Practical Alternative to Oxidative Treatment of Refractory Gold Ores S Ellis Kalgoorlie Consolidated Gold Mines Kalgoorlie WA Abstract Since early 2001 Kalgoorlie Consolidated Gold Mines KCGM has successfully operated an ultra fine grinding UFG circuit to supplement its roaster capacity for the

Refractory ore  chemistry  Britannica
Refractory ore chemistry Britannica

Other articles where Refractory ore is discussed gold processing Extraction from refractory ores Many goldbearing ores and concentrates are not readily amenable to cyanidation owing to the presence of substances that consume the cyanide reagent before it can dissolve the gold preferentially adsorb the gold as it dissolves a phenomenon called pregrobbing or completely surround the

MICROBIAL PRETREATMENT OF DOUBLE
MICROBIAL PRETREATMENT OF DOUBLE

one of the leading emerging pretreatment techniques being employed for the processing of double refractory gold ores and concentrates Currently numerous studies are in progress to further improve upon the efficiency of the bacterial process and to investigate the potential of other microorganisms

Pretreatment Process on Refractory Gold Ores with As
Pretreatment Process on Refractory Gold Ores with As

Pretreatment Process on Refractory Gold Ores with As A D Bailey etc have come up with a batch biooxidation 24 to increase pulp density It made pulp density reached 40 even 50 was applied to refractory gold ore bearing low grade sulfide A Mazuelos etc have designed a

Carboninchlorine Treatment of Refractory Gold Ores
Carboninchlorine Treatment of Refractory Gold Ores

Carboninchlorine Treatment of Refractory Gold Ores Chlorination in the treatment of refractory gold ores is applicable in many lowgrade gold operations When usable this treatment provides an economic means of consuming sulfides and deactivating disseminated organic carbon Chlorination however is a pretreatment technique

MICROBIAL PRETREATMENT OF DOUBLE
MICROBIAL PRETREATMENT OF DOUBLE

one of the leading emerging pretreatment techniques being employed for the processing of double refractory gold ores and concentrates Currently numerous studies are in progress to further improve upon the efficiency of the bacterial process and to investigate the potential of other microorganisms

Review Pretreatment Process on Refractory Gold Ores
Review Pretreatment Process on Refractory Gold Ores

Atmospheric acid treatment usually uses permonosulfuricacid to oxidize refractory gold or e with As It’s said that the method is not suitable for all refractory gold ores but has good results in dealing with symbiotic arsenopyrite gold ore Because arsenopyrite is easily oxidized Compared with roasting pretreatment and pressure oxida

280 RECENT ADVANCES IN THE TREATMENT OF
280 RECENT ADVANCES IN THE TREATMENT OF

economic cutoff ore grades to l g AuT or less ln some cases However it is the treatment of refractory gold ores that the greatest diversity of new developments is evident Because of the overwhelming dominance of the cyanide process for gold extraction over the past 100

Treatment of pyritic matrix gold–silver refractory ores by
Treatment of pyritic matrix gold–silver refractory ores by

Since ozone gas O3 is a strong oxidizing it may be regarded as a promising alternative in the treatment of refractory ores The present work summarizes the results obtained when two pyritic refractory ores from Mexican sites samples A and B were pretreated with an oxygenozone stream in acid media before cyanidation

The recovery of gold from refractory ores by the use of
The recovery of gold from refractory ores by the use of

The recovery of gold from refractory ores by the use of carboninchlorine leaching With highly carbonaceous ores CICL achieved a higher recovery than with primarily sulfidic refractory ores Basic cyanide amenability testing of two carbonaceous ores achieved recoveries of only 55 and 46 With CICL treatment recoveries on carbon were 90 and 92

HYDROMETALLURGY OF GOLD NEW PERSPECTIVES
HYDROMETALLURGY OF GOLD NEW PERSPECTIVES

techniques particularly heap leaching were developed for the treatment of low grade ores The developments related with gold extraction from pregnant solutions include carboninpulp carboninleach processes the use of resins and solvent extraction techniques A considerable effort has also been made to treat refractory ores

Gold mineral processing  Hatch Ltd
Gold mineral processing Hatch Ltd

Treatment of refractory gold ore whole ore and flotation concentrates has become more prominent since the 1980s with many gold discoveries often including ores that are wholly or partially refractory Refractory pretreatment processes include pressure oxidation biological oxidation and various forms of roasting Design teams familiar with all three pretreatment processes can maximize a projects value

Pretreatment Process on Refractory Gold Ores with As
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 Arsenicbearing 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

double refractory gold ores
double refractory gold ores

Microbial pretreatment 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 microsized gold particles are enclosed inside the mineral Chat Online Microwave pretreatment of a

Gold extraction  QueensMineDesignWiki
Gold extraction QueensMineDesignWiki

The main pretreatment options for “unlocking” the gold from refractory ores are chemical biological pressure oxidation thermal and physical treatment The figure below indicates the various pretreatment options before cyanidation can occur for refractory ores

Refractory  Definition of Refractory by Lexico
Refractory Definition of Refractory by Lexico

‘Also under investigation as possible container materials are certain types of refractory ceramics’ ‘Mr Mills said KCM had for the past year been carrying out tests to determine the economic value of the dumped refractory ores in an effort to recover and process the hundreds of tonnes of copper’

Gold Ore Processing Volume 15  2nd Edition
Gold Ore Processing Volume 15 2nd Edition

Gold Ore Processing Volume 15 2nd Edition Project Development and Operations Refractory Ore Process Options 6 Refractory Process Selection water management solid–liquid separation and treatment of challenging ores such as double refractory carbonaceous sulfides Outlining best practices in gold processing from a variety of

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