refractory gold ore flotation

Refractory gold ore pretreatment 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

A refractory gold ore is an ore that has ultra fine gold particles disseminated throughout its gold occluded minerals These ores are naturally resistant to recovery by standard cyanidation and carbon adsorption processes These refractory ores require pretreatment in order for cyanidation to be effective in recovery of the gold

3 For refractory gold and silver ores which cannot be treated directly by mercury amalgamation or cyanidation a combined process including flotation is needed However there are some limitations in flotation such as ores with gold particles larger than 0203 mm or pure quartz gold ores without metal sulfides which are difficult to deal

Jul 23 2014 · Since its discovery froth flotation has been a major component for the processing of sulfiderich ores including copper coal and refractory gold In gold mining froth flotation is used to separate gold from gangue by utilizing gold’s hydrophobicity First refractory gold ore is ground as finely as possible – usually so the individual

Basnayaka L Subasinghe N and Albijanic B 2016 Effect of Clay Rheology on Flotation of a Refractory Gold Ore in Proceedings 13th AusIMM Mill Operators Conference 2016 pp 77–84 The Australasian Institute of Mining and Metallurgy Melbourne

Gold Ore Hexate Refractory Gold Process The MACH REACTOR and its applications enjoys worldwide patent protection Testing facilities utilizing a scaled down laboratory size reactor are available at both the SGS Laboratories and Mintek in South Africa and at ALS in Perth

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

disseminated gold from the flotation concentrate resulted from processing of a refractory ore of one of Russian gold deposits Concentrate description Gold grade of the head flotation concentrate was 296 gt The concentrate size was 80 80 um Mineral composition of the concentrate comprises 17 of rockforming minerals 59 of pyrite and 24

A high carbon lowgrade gold ore in which gold mainly occurs in carbonaceous matters is a typical refractory gold ore whose conventional cyanide leaching extraction is only 129 In this paper by the process of flotationroastingleaching gold was effectively enriched and extracted

The flotation process in general does not float free gold particles but is particularly effective when gold is associated with sulfide minerals such as pyrites In a typical pyrytic gold ore the gold is encapsulated within an iron sulfide crystal structure Highly oxidized ores generally do not respond well to flotation

REFRACTORY ORE PROCESSING The common definition of “refractory” gold ores are those ores that do not allow the recovery of gold by standard gravity concentration or direct cyanide leaching One major category of refractory ores are gold values contained within the crystalline structure of sulfide minerals such as pyrite and arsenopyrite

The flotation plants fall into a number of categories viz flotation after milling flotation of current residues and reclaimed residues flotation of refractory ores and the flotation of gold

The Leachox refractory gold process has to date been applied to the selectivetreatment of several refractory gold ores but on a relatively small scale In this paper the successful implementation of the process from initial testing through to commissioning at one of the world’s largest refractory gold

A high carbon lowgrade gold ore in which gold mainly occurs in carbonaceous matters is a typical refractory gold ore whose conventional cyanide leaching extraction is only 129 In this paper by the process of flotationroastingleaching gold was effectively enriched and extracted

176 FLOTATION OF CARBONACEOUS CLAYCONTAINING GOLD ORES These ores belong to a group of refractory gold ores where flotation techniques can be used to a remove interfering impurities before the hydrometallurgical treatment process of the ore for gold recovery and b to preconcentrate the ore for further pyrometallur­

The flotation process in general does not float free gold particles but is particularly effective when gold is associated with sulfide minerals such as pyrites In a typical pyrytic gold ore the gold is encapsulated within an iron sulfide crystal structure Highly oxidized ores generally do not respond well to flotation

The Leachox refractory gold process has to date been applied to the selectivetreatment of several refractory gold ores but on a relatively small scale In this paper the successful implementation of the process from initial testing through to commissioning at one of the world’s largest refractory gold

REFRACTORY ORE PROCESSING The common definition of “refractory” gold ores are those ores that do not allow the recovery of gold by standard gravity concentration or direct cyanide leaching One major category of refractory ores are gold values contained within the crystalline structure of sulfide minerals such as pyrite and arsenopyrite

Refractory gold ores commonly contain free gold submicroscopic gold carbonaceous material base metals pyrite marcasite arsenopyrite and pyrrhotite Swash 1988 Clays and graphitic carbon are the most troublesome accessory components in some of these ores as far as gold

Refractory gold ore pretreatment 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 Chat Online

PRESSURE OXIDATION OF REFRACTORY GOLD ORES THE METATES GOLD PROJECT EXPERIENCE By 1Gary Parkison 2Art Ibrado 3Grenvil Dunn 3Nelson Mora and 3Yong Yong Teo 1Chesapeake Gold Corp Canada 2M3 Engineering and Technology USA 3 Orway Mineral Consultants WA Pty Ltd Australia Corresponding Author

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

The flotation plants fall into a number of categories viz flotation after milling flotation of current residues and reclaimed residues flotation of refractory ores and the flotation of gold

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

Chloride–hypochlorite 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