effect of pretreatment of sulfide refractory concentrate with

Effect of Pretreatment of Sulfide Refractory Concentrate ...

The majority of the refractory gold and silver occurs in occlusion in sulphides, then precious metal dissolution is possi- ble by first oxidizing auriferous sulfide concentrate using sodium hypochlorite-sodium-hydroxide solution followed of pressure cyanidation of the oxidized concentrate, for the extraction of precious metals.

Published in: Advances in stone Engineering and Science · 2013Authors: Alejandro Valenzuela Valenzuela · Jesus L Valenzuela · Jose R PargaAffiliation: Universidad De Sonora

(PDF) Effect of Pretreatment of Sulfide Refractory ...

A refractory gold and silver concentrate was leached with sodium cyanide. Results show low extraction percentages, being 34 % of gold and 40 % of silver.

Effect of Pretreatment of Sulfide Refractory Concentrate ...

ble by first oxidizing auriferous sulfide concentrate using sodium hypochlorite-sodium-hydroxide solution followed of pressure cyanidation of the oxidized concentrate, for the extraction of ...

Effect of Pretreatment of Sulfide Refractory Concentrate ...

Effect of Pretreatment of Sulfide Refractory Concentrate with Sodium Hypochlorite, Followed by Extraction of Gold by Pressure Cyanidation, on Gold Removal. 7 Pages. ... “The Effect of Sulfide Concentrate Mineralogy sure, and these are related to the amount of dissolved and Texture on Reactive Oxygen Species (ROS) Genera- oxygen. ...

Effect of Pretreatment of Sulfide Refractory Concentrate ...

The majority of the refractory gold and silver occurs in occlusion in sulphides, then precious metal dissolution is possible by first oxidizing auriferous sulfide concentrate using sodium hypochlorite-sodium-hydroxide solution followed of pressure cyanidation of the oxidized concentrate, for the extraction of precious metals.

Effect of Pretreatment of Sulfide Refractory Concentrate ...

In this study, the effect of oxygen pressure, concentration of sodium hypochlorite, temperature, and initial pH, in precious metals recovery and As removal were evaluated using a 2<sup>4</sup> factorial design. Characterization of the ores showed that pyrite and arsenopyrite were the main minerals present on the concentrate.

pressure oxidation refractory gold - alltechnews.in

Effect of Pretreatment of Sulfide Refractory Concentrate . The majority of the refractory gold and silver occurs in occlusion in sulphides, then precious metal dissolution is possible by first oxidizing auriferous sulfide concentrate using sodium hypochlorite-sodium-hydroxide solution followed of pressure cyanidation of the oxidized concentrate ...

Effect of Pretreatment on Leaching Primary Copper …

Bas et al. [19] investigated the effect of an ammonia pretreatment before leaching copper sulfide-bearing gold ore to increase gold extraction at low cyanide concentrations. Gold extraction increased from 6.7% (leaching without pretreatment) to 99.8% with pretreatment.

Fungal pretreatment of sulfides in refractory gold ores ...

For refractory sulfidic gold concentrate with about 15% initial sulfide sulfur content, a higher oxidation level of 57% was realized. Raman spectroscopy and X-ray diffraction analysis showed reduction in sulfide sulfur concentration and increase in oxide phases resulting from fungal treatment.

Pretreatment of a refractory arsenopyritic gold ore using ...

The pretreatment conditions are reported as NaOH concentration, pretreatment time and solid concentrations in the slurry. The results shown in Fig. 8 can be …

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