pyrrhotite bearing gold ore

ORE DEPOSIT TYPES AND THEIR PRIMARY EXPRESSIONS KG ,

ore formation is a common and intrinsic part of crustal evolution, large and super large ore deposits require the coincidence of particularly favourable combinations of processes and source parameters This brief review outlines the key primary geochemical expressions of the main metalliferous ore deposit types found in Australia To a large...

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Gold in Minerals and the Composition of Native Gold

GOLD IN MINERALS AND THE COMPOSITION OF NATIVE GOLD By ROBERT S JONES and MICHAEL FLEISCHER ABSTRACT Gold occurs in nature mainly as the metal and as various alloys It forms complete series of solid solu 173 tions with silver, copper, nickel, palladium, and...

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Method of processing refractory pyrite

EFFECT technical result is increased through extraction of gold, providing efficient mineral raw material, reduction of capital and operating costs by creating technology for processing refractory pyrite-arsenopyrite-pyrrhotite-antimonite gold-bearing or 12 cl, 12 dwg, 4 ex...

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Gold with Pyrite, Pyrrhotite, Marcasite and Arsenopyrite ,

Apr 17, 2016 0183 32 Gold with Pyrrhotite Pyrrhotite readily reacts with cyanide to form cyanates and thiocyanates and it readily consumes oxygen Aeration with lime ahead of cyanidation is usually used on ores in this classification Aeration for preconditioning is used at Dome, Homestake, Kerr-Addison, and Pamour Gold with Arsenopyrite - Arsenic Minerals...

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Method of pyrrhotite

The invention relates to the field of mineral processing and may be used in the processing of mineral raw materials containing pyrrhotite In beneficiation of copper, copper-zinc and copper-Nickel ores and industrial raw materials containing pyrrhotite, there is a need for flotation separation of sulfides of copper and zinc from harmful impurities - pyrrhotite...

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USGS Geological Survey Bulletin 1286 Gold

GOLD-BEARING VEINS AND SHEAR ZONES , and some sphalerite and pyrrhotite have been reported Zodac, 1947 Ingalls, 1960 , , making it difficult to estimate the average gold content Difficulty in blocking out ore shoots was one of the major obstacles to large-scale development of the deposits Geochemical sampling of surface exposures ....

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pyrrhotite cyanide consumption

cyanidation of a pyrrhotite bearing gold ore cyanidation of a pyrrhotite bearing gold ore The most of refractory ore is gold bearing sulfideto complete alkaline pre-oxidation for pyrrhotite, so makes gold easier to cyanide and leach The Recovery Of Gold from ,...

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Cyanidation of a pyrrhotite

Pyrrhotite is in much higher concentration than gold in a gold ore The oxygen requirement by the pulp will depend on the concentration of pyrrhotite in the ore and the degree of oxidation of its surface A study on hexagonal pyrrhotite indicated a very low solubility in aerated cyanide solutions Linge, 1995...

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IMPORTANT ORE MINERALS

Molybdenum - The primary ore mineral is molybdenite Nickel - The primary nickel ores are pentlandite, nickel bearing pyrrhotite and a weathering product, garnierite a mixture of népouite, pecoraite and willemseite Niobium Columbium - The primary ore mineral is pyrochlore with minor columbite and tantalite-columbite...

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cyanidation of a pyrrhotite bearing gold ore

Cyanidation of a pyrrhotite-bearing gold ore 353 The European Journal of Mineral Processing and Environmental Protection Vol3, No3, 0868, 2003, pp 361 Cyanidation of a pyrrhotite-bearing gold ore cyanidation of a pyrrhotite bearing gold ore Get Price...

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Pyrite and Pyrrhotite textures and composition in ,

The source of Au and As for this final, and most economically important, fluid-flow event is considered to be from carbonaceous shales deeper in the basin, where original gold-bearing diagenetic arsenian pyrite reacts with organic matter and is converted to pyrrhotite, with release of Au, As, and S to the metamorphic flu...

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The effect of grinding chemistry on cyanide leaching of ,

For that reason, cyanide gold leaching is very efficient when ceramic or high chromium media was used during the grinding of the ore It can be expected that the leach behaviour would be different if leaching is preceded by pre-oxidation, as is often done for pyrrhotite bearing or...

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PDF Pyrrhotite of Gold

Pyrrhotite of Gold-Bearing Ores Composition, Point Defects, Magnetic Properties, Gold Distribution , It is established that the maximum magnetic induction of pyrrhotite and gold concentrations ....

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Pyrite and Pyrrhotite Textures and Composition in ,

Pyrite and Pyrrhotite Textures and Composition in Sediments, Laminated Quartz Veins, and Reefs at Bendigo Gold Mine, Australia Insights for Ore Genesis , and compositional zoning of pyrite in the gold-bearing saddle reefs, quartz veins, and surrounding sedimentary rocks provide new information on the potential source and timing of gold and ....

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Rcovery of gold in pyritic ores

Sulfide ores, and pyrites in particular, have caused and continue to cause difficulty in recovering the gold values from these or In most instances, visible gold can not be seen under microscopic examination of pyrite gold or However, if the ore is ground to -200 mesh, most times, a few specs of gold can be visibly seen under microscopic ....

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Pyrrhotite The mineral pyrrhotite information and pictures

Pyrrhotite is commonly pseudomorphed by Pyrite, with complete replacement of the Pyrhottite by sparkling Pyrite crystals Pyrrhotite is named from the Greek word pyrrhos, which means color of fire This is despite the fact that the usual color of Pyrrhotite is a bronze color rather than red however its tarnish may have hints of sparkling red...

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pyrrhotite cyanide consumption

mixture in cyanide process gold bearing quartz - Gold Ore 20121025-is the basis for the cyanide process that is used to recover gold Gold-bearing quartz veins in fractured Cyanidation of a pyrrhotite ,...

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Pyrite and pyrrhotite textures and composition in ,

The various types, textures, and compositional zoning of pyrite in the gold-bearing saddle reefs, quartz veins, and surrounding sedimentary rocks provide new information on the potential source and timing of gold and arsenic and related fluid processes responsible for mineralization at Bendigo...

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Cyanidation of a pyrrhotite

gold and is an unlikely reaction to significantly consume dissolved oxygen and cyanide Dunn et al, 1995 Pyrrhotite is in much higher concentration than gold in a gold ore The oxygen requirement by the pulp will depend on the concentration of pyrrhotite in the ore ,...

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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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MBMMLLC Testing hard rock ore for free gold and ,

Jun 12, 2013 0183 32 Testing hard rock ore for a client The sample contained free gold, galena with associated silver, and pyrrhotite The galena appears as a blue grey band on the shaker table...

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how to recognize gold bearing ore

how to recognize gold bearing ore , Most gold-bearing rivers have a certain amount of low-grade gold values dispersed throughout the gravel The general gold path tends to have more gold along it than the average gravel throughout the rest of the river You also generally find more iron and other heavy elements along the gold path...

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PDF Gold recovery from a refractory pyrrhotite ore by ,

The aim of the present investigation was to study the biooxidation of a refractory gold-bearing pyrrhotite, in order to increase the gold recovery during the subsequent conventional cyanidationBacterial cultures utilised in the biological test , elseviernlrlocaterijminpro Gold recovery from a refractory pyrrhotite ore by biooxidation S ....

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PDF Cyanidation of a pyrrhotite

PDF The Musselwhite Mine in Canada processes a free milling gold ore at 55-58g/t Au and 42 pyrrhotite A laboratory investigation was conducted to improve cyanidation The pyrrhotite was ....

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Gold Ore Roasting Techniques

Gold Ore Roasting Techniqu View Larger Image Metallurgical Content , sulphotellurides, and pyrrhotite Straight pyritic ores, where the pyrite is present in small quantities, usually yield their gold to fine grinding and cyanidation alone , and such could be ruled out as a cause of refractory behavior of gold-bearing arsenical ores ....

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Characteristics of ore minerals associated with gold at ,

Characteristics of ore minerals associated with gold at the Prestea mine, Ghana , sphalerite, chalcopyrite, pyrrhotite, galena, tetrahedrite, bournonite, boulangerite and jamesonite The occurrence of the gold is intimately associated with arsenopyrite and the , submicroscopic grains in the sulphide or Gold...

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Communs geol Surv Namibia, 2000 , 169

Mineralogy of the Navachab skarn deposit, Namibia an unusual Au-bearing skarn in high-grade metamorphic rocks , paragenetic sequences are distinguished in skarn ore an older one with pyrrhotite, chalcopyrite, arsenopyrite, , scheelite and urani-nite Fig 9 and a younger one bearing native bismuth, gold, pyrite, bismuthinite, accompanied ....

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Note on «birds

Note on «birds-eye» textures in some Norwegian pyrrhotite-bearing or By Per Chr Sæbø, Thor L Sverdrup and Harald Bjørlykke Witli 3 tlFureB in tlie text Abstract Three specimens, one from R 229 na, Nordland County, one from Lillefjellklumpen, Grong, Nord-Trøndelag County and one from...

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The effect of grinding chemistry on cyanide leaching of ,

Show simple item record The effect of grinding chemistry on cyanide leaching of gold in the presence of pyrrhotite...

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Gold Bearing Sulphide Ores

PDF Cyanidation of a pyrrhotite-bearing gold ore While gold-bearing sulfide ore cyanidation can be challenging there is a great variation in the extent to which sulfide minerals affect the leaching process Live Chat Main Types of Gold-Bearing Ore Material Part 1...

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