alkaline pressure oand idation of gold concentrates

Alkaline Pressure Oxidation of a Gold-Bearing Arsenopyrite. Apr 26, 2007· The aqueous pressure oxidation of gold bearing arsenopyrite concentrates in alkaline solution was investigated as a function of O2, pressure and NaOH concentration. Dissolution of gold from the leach residue was accomplished by standard cyanidation.

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Jan 01, 2009· An acidic pressure oxidation pre-treatment of refractory gold concentrates from the KweKwe roasting plant, Zimbabwe Minerals Engineering, 12 ( 8 ) ( 1999 ), pp. 863 - 875 Article Download PDF View Record in Scopus Google Scholar

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Alkaline Oand Idation Refractory Gold brusq. Alkaline pressure oand idation of gold concentrates.High pressure oxidation gold.The utilization of a pressure-oxidation circuit to treat refractory gold ores or concentrates is a complex decision, taking into consideration capital costs, operating costs, gold,more info high pressure o idation of refractory gold.

alkaline pressure oand idation of gold concentrates

alkaline pressure oand idation of gold concentrates Gold leaching with sulfur in alkaline solutions under oxygen pressure 197 For residue For concentrate Final pH in leachates Fig. 3 Correlation between leached Au and final pH value in leachates 3.3 Effect of leaching temperature The leaching ratio of Au in nearly equal quantity of oxygen consumption at various …

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Pressure Oxidation Refractory Gold. Sulfide Iron Leaching For Gold Recovery Flowsheet Pressure Oxidation Of Refractory Gold Ores The 2014101Pressure 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 …

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alkaline pressure oand idation of gold concentrates

alkaline pressure oand idation of gold concentrates. Alkaline Pressure Oxidation of a GoldBearing Arsenopyrite ... Oct 01, 1995· The aqueous pressure oxidation of gold bearing arsenopyrite concentrates in alkaline solution was investigated as a function of O2, pressure and NaOH concentration. Get Price

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alkaline pressure oand idation of gold concentrates. Alkaline Pressure Oxidation of a Gold Bearing. The aqueous pressure oxidation of gold bearing arsenopyrite concentrates in Alkaline pressure oxidation at 160°C kPa O2 and 2 M NaOH resulted in between the level of arsenic dissolution by alkaline pressure ox idation and .

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Gold extraction was found to be proportional to the degree of arsenopyrite oxidation. Alkaline pressure oxidation at 160°C, 2413 kPa O2, and 2 M NaOH resulted in about 98% sulfur oxidation and 86%...

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Alkaline Oand Idation Refractory Gold - cipref . alkaline pressure oand idation of gold concentrates. alkaline pressure oand idation of gold concentrates. Intensified alkaline leaching pretreatment of refractory gold concentrates. • 427 -. Table 1 . idation rate of As is 77.9%, but only 28.6% for S. These results show Get Price.

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Pressure oxidation is a widely accepted method to treat refractory gold ores. Gold recovery is generally lower from alkaline than acidic pressure oxidation discharge due to passivation and incomplete oxidation of mineral. Gold ore from Goldstrike, NV, is a typical refractory gold ore containing sulfide and carbonaceous matter. Alkaline pressure oxidation …

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alkaline pressure oand idation of gold concentrates. Gold Mining Process Development » Denver Mineral Engineers Gold Mining Process Development, (pressure oxidation) Roasting;, Placer mining has generally been where gravity concentrates have been most The Use of AuRIX 100 Resin for the Selective Recovery ...

Alkaline Oand Idation Refractory Gold

A concentrate containing 34.08gt of gold with the gold recovery ratio of 81.20 was obtained by flotation. After roasting, microwave heating or alkaline pressure oxidation, the gold cyanidation ratio reached 82.37, 81.26 and 71.09 respectively. …

Alkaline Oand Idation Refractory Gold

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Alkaline Oand Idation Refractory Gold. High pressure o idation of refractory gold interest in the application of pressure oxidation to the treatment of refractory gold gold. alkaline pressure ... ~idation of the gold-bearing pyrite concentrate. each autoclave measures 3.57 m internal diameter by 27 m long, ...

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Table 4.3 Effect of temperature on the average anodic dissolution rate of gold in 1 M Na2S2O3 solutions and 0.1 M NaOH solution at 0.25 V, 200 rpm - "OXIDATION OF REFRACTORY GOLD CONCENTRATES AND SIMULTANEOUS DISSOLUTION OF GOLD …

Alkaline Pressure Oxidation of a Gold- Bearing ...

The aqueous pressure oxidation of gold bearing arsenopyrite concentrates in alkaline solution was investigated as a function of O, pressure and NaOH concentration. Dissolution of …

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Alkaline Oand Idation Refractory Gold

alkaline pressure oand idation of gold concentrates. In refractory minerals and concentrates gold is present in microparticles can be roasting, pressure oxidation or bio-oxidation. Currently concentrate and gold recovery from the cyanide com- plex.

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Pressure oxidation of double refractory gold concentrates. The chemical processes that lead to gold losses during high pressure hydrometallurgical treatment of double refractory materials were examined subsequent cyan idation Pressure o xidation . Details Alkaline Oand Idation Refractory Gold

alkaline pressure oand idation of gold concentrates

Alkaline Pressure Oxidation of a GoldBearing Arsenopyrite . 1/12/1995 The aqueous pressure oxidation of gold bearing arsenopyrite concentrates in alkaline solution was investigated as a function of O 2 pressure and NaOH concentration Dissolution of gold from the leach residue was accomplished by standard cyanidation Gold extraction was found to be proportional to the …

high pressure o idation of refractory gold minerals - MWR

high pressure o idation of refractory gold minerals. ... Atmospheric alkaline pre oxidation of refractory sulphide. ... The reasons for gold-bearing materials refractory nature and behaviour features of carbonaceous matter during pressure oxidation of concentrates were discussed.