sulfide ores gold

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

Bacterial Oxidation Of Refractory Sulfide Ores For Gold

2008927ensp enspthe microbiological leaching of refractory sulfide ores pyrite arsenopyrite for recovery of gold is reviewed in this article the underlying physiological biochemical and genetic fundamentals of the bacteria involved thiobacillus and sulfolobus spp are complex and have yet to be elucidated in depththe chemistry of acid and biological leaching of pyrite and arsenopyrite minerals is

Gold Sulfide Ore Processing

Aug 22 2019 gold flotation flotation process is widely used for lode gold processing in most cases the flotation method has a good effect in sulfidecontaining gold ore with high floatability in addition the flotation process is also used for polymetallic goldbearing ores such as goldcopper goldlead goldcopperleadzincsulfur ore

Differential Flotation Of Sulfide Ores For

However in nonfreemilling goldcontaining materials such as refractory ores and concentrates gold particles are in locked within a matrix most commonly sulfidic minerals and cyanide solution cannot break up the sulfide structures such as pyrite fes 2 andor arsenopyrite feass thus pretreatment is necessary to decompose the mineral

The Method Of Flotation Of Sulphide Gold Ores

The invention relates to the field of mineral processing and may be used for flotation of sulphide gold and polymetallic ores the technical result is to increase flotation the method includes conditioning the pulp with xanthate and additional collector which is used as a concentrate metasulfite representing a mixture of 37dimethyltiannan

Flexicone Technology For Sulfide Ores Flexicone

For the processing of refractory goldbearing refractory and sulfide ores flexicone has developed a unique enrichment technology the technology includes the processes of ultrafine grinding and oxidation of sulphides extraction of released gold and platinum group metals by centrifugal concentrators and leaching of gold silver and palladium

Differences In Processing Sulfide And Oxide Gold Ores

Establishing the process mineralogy of gold ores mineralogy helps address issues and problems related to gold ore processing 6 iron sulfide ores gold occurs as by difference of the submicroscopic gold more detailed

Sulfide Ore Article About Sulfide Ore By The Free

The following article is from the great soviet encyclopedia 1979 it might be outdated or ideologically biased sulfide ore any of several natural mineral formations consisting of metal sulfides metal selenides tellurides arsenides and antimonides are also classified among the sulfide ores sulfide ores are an important source for the production

Gold Recovery Of Refractory Sulfide

Refractory sulfide gold ores are characterized by yield poor gold recovery in direct conventional cyanide leaching that problem is an old and still existing problem until this time the refractory sulfide gold ores in which gold is surrounded by sulfide minerals oxidative pretreatment of the ore is important

Rebellious Ores Sulfides Selenides And Tellurides

2012418ensp enspit is extremely important when treating high sulfide ores with cyanide to keep a sufficient protective base in the solution many sulfide minerals also contain things like copper or antimony that can react with the cyanide preventing the cyanide from leaching out the gold and silver

Characterizing Gold In Refractory Sulfide Gold Ores And

Gold is present in refractory sulfide gold ores mainly in arsenian pyrite and arsenopyrite where it occurs in both the chemically bonded state and as nanosize grains of metallic gold during roasting or pressure oxidation the sulfide matrix is destroyed and essentially all the gold is converted to the metallic form the liberated gold is readily dissolved in conventional cyanide media

Sulfide And Oxide Gold Ore Taniec W Centrum

Sulfide and oxide gold ore bornite is a copper iron sulfide mineral with a chemical composition of cu 5 fes 4 it occurs in igneous metamorphic and sedimentary rocks minable concentrations of bornite occur in hydrothermal veins contact metamorphic zones and in the enriched zone of many sulfide mineral deposits send email email protected

Palladium Iridium And Gold In The Ores And Host Rocks

Palladium iridium and gold in the ores and host rocks of nickel sulfide deposits in western australia reid r keays and r m davison abstract neutron activation analysis has been used to determine palladium iridium and gold and occasionally ruthenium and osmium in the ores

Pdf Gold Extraction And Recovery Processes For

Sulfide ores first subjected to leaching of cu 20080078269 method of leaching gold 3408 leach residue mixed with solution containing producing leach residue having 79 cu leaching reaction enhanced by the copresence of chloride ion and ferric ion with ph 19 or less either copper or bromide ions or both together with for internal use

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

Review Pretreatment Process On Refractory Gold Ores

Refractory gold ores with as pretreatment options for dealing with refractory gold ores are illustrated in fig 1 and described in detail in the subsequent sections 2 roasting oxidation pretreatment so far the application of roasting oxidation pretreatment has a history of 70 years the principle is to destroy the ores

Us5114687a Ammonia Extraction Of Gold And Silver

Gold and silver are extracted from their elemental state or from complex ores and alloys by leaching them with a solution containing ammonia ammonium salts and one or more oxidants the process is particularly effective for refractory gold ores including sulfide and carbonaceous ores

Pdf Ionic Mode Of Gold In Sulfide Ores Researchgate

Pyritethe major mineral of massive sulfide oresis the main gold concentrator up to 20 ppm 1 ppm on average as follows from the results of rational analysis the concentration of

Processing Gold From Sulfide Ores Assaying

2 ensp enspwe are trying to process gold from arsenopyrite and chalcopyrite ore our xrf indicated that there was a high concentration of gold along with a variety of minerals we have tried various methods of refining without much luck due to all of the other minerals with different melting points we had a

Extracting Metals From Sulfide Ores

Biochemical oxidation of the sulfide minerals releases the gold and allows it to be leached by the chemicals used in conventional gold leaching biochemical processes are being developed for the treatment of copper nickel and cobalt sulfide ores and are expected to become the major method for recovery of these metals in the future

Can Nitric Acid Extract Gold From Sulfide Ore

Recovery of gold in pyritic sulfide ores that appears to leave froth flotation as still the best method of recovering the gold from pyritic ores sulfide ores such as chalcopyrite sphaelerite galena and pyrrhotite and mixtures of these ores have historically been found with micron size gold particles included in them this generally involves frother

Palladium Iridium And Gold In The Ores And Host

However it may release significant quantities of gold and sulfurthe ultramafic host rocks of the nickel sulfide ores have very low pdir ratios relative to the nickel ores and also to normal ultramafic rocks that are not known to be associated with major amounts of nickel sulfides this relation may be a valuable exploration guide

Extraction Of Gold From A Lowgrade Double

The treatment process of a lowgrade refractory gold ore containing sulfide minerals and carbonaceous matters was studied in this work the gold extraction of this ore by allsliming cyanidation was only 1175 hence a pretreatment was necessary in this paper a flotationpreoxidationcyanide leaching process was developed

Recovery Of Silver Gold And Lead From A Complex

Gold and silver extraction is usually low and cyanide consumption is high because of base metal complex formation several researchers 25 reported acidi c thiourea to be more reactive and less affected by suuidj minerals in complex ores but as with caustic cyanide gold and silver extrac tion is usually low with complex sulfide gold

Sulfide Ores An Overview Sciencedirect Topics

Gold au content in sulfide ores is determined by fire assay using scorification or cupellation crucible fusion of the samples mixed with a lithargebased flux that under reducing conditions collects the precious metals in a metallic lead button oxidizing fusion helps the base metals present in the lead button to be substantially separated

Sulfide Ores Clariant Ltd

Sulfide ores optimize your recovery and improve grade with specialized collectors and frothers our alternatives have proven performance in the flotation of copper ores polymetalic ores and gold associated to sulfides polymetalics ores hostaflot collectors are formulated to achieve the best possible recovery and selectivity when needed

Doublerefractory Carbonaceous Sulfidic Gold Ores

201611ensp enspgold in refractory sulfide ores occurs as fine inclusions or in solid solution typically within pyrite marcasite and arsenopyrite grains in this type of ore because the gold is encapsulated the interaction with cyanide to form the soluble metal complex is inhibited marsden and house 2006 la brooy et al 1994

Establishing The Process Mineralogy Of Gold Ores

20151216ensp enspmany sulfide ores including carlintype gold ores 7 arsenic sulfide ores gold occurs as liberated particles and inclusions and submicroscopic gold in arsenopyrite and oxidized products giant yellowknife campbell mine canada sao bento brazil and carlintype ores 8 antimony sulfide ores gold occurs mainly as native gold with minor

Alkaline Sulfide Gold Leaching Kinetics Request Pdf

Gold is mainly extracted from its ores or concentrates by leaching with oxygenated cyanide solutions 12 cyanide consumption during leaching and the discharge of excess cyanide in wastewater

Pressure Oxidation Of Refractory Gold Ores The

2014101ensp ensppressure oxidation is employed to liberate gold and silver in refractory sulfide concentrates often and ores the main pressure oxidation products from iron sulfide minerals are sulfuric acid and metal sulfates and hematite depending on the conditions within the autoclave acid containing iron compounds can be formed