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There are many applications of diagnostic leaching for gold ores (Lorenzen and Van Deventer, 1993;Celep et al., 2009;Saba et al., 2011) telluride ores (Henley and Sauter, 2000) and bulk flotation
Application of Diagnostic Leaching Technique for Refractory Gold Ores
Gold recoveries from cyanide leaching varied significantly across the samples from this gold ore site and ranged from 9. This indicates a variability in the refractory nature of gold in the deposit. Cyanide leaching at ambient temperature and pressure may therefore not be economically feasible
Diagnostic leaching starts with the detailed mineralogical examination that has to be the first step in the selection of processing steps of a gold deposit. The term of refractory gold ore stands for the gold particles that are not amenable to recovery by conventional cyanidation process by the low extraction (less than 80%) even after fine grinding.
Abstract: The amenability of a refractory ore to the extraction of gold and silver by cyanide leaching was investigated. Diagnostic leaching tests were also performed to shed light on the refractory characteristics of ore. The leaching tests show that the ext raction of gold and silver is consistently low, 47% and %, respectively, over a leaching period of 24 h.
#0183;#32;APPLICATION OF DIAGNOSTIC LEACHING TECHNIQUE . In this study. physical. chemical and biological pretreatment methods applied to refractory gold ores before cyanide leaching were investigated.
#0183;#32;This washing step increased the dissolution rate of Leaching of gold from refractory ores 1385 gold by more than 50% after a leaching time of 2 hours in the case of the WDL sample. The total % of gold that dissolved after 2=1 hours leaching time also increased from
reach it in cyanide leaching process. 2) The gold ores with As must be broken or decomposed in the gold particles scales, so that gold is fully exposed, and then extracted with the appropriate gold leaching agent. The process of crushing or decomposition before gold leaching is called pretreatment of refractory gold.
Metallurgical ContentGold Leaching amp; Processing of Arsenic OreMispickel (Arsenopyrite: FeAsS).6Leaching and Recovering Gold from Antimony MineralsStibnite (Antimony Sulphide, Sb2S2)Telluride Gold Ore ProcessingSolubility of TelluridesGold Extraction from Carbonaceous OreList Gold Refractory Process Methods Where gold is associated with arsenic, antimony, tellurium, and
#220;. Fen Bilimleri Enstit#252;s#252; Application of Diagnostic Leaching Technique for Refractory Gold Ores 16. Say Eyl#252;l 2008
#0183;#32;As an analytical technique, diagnostic leaching is very useful in establishing the ratio of gold associated with different mineral phases within a given ore. It can be applied both to characterisation of new ores and to problem solving in wellcharacterised ores, where metallurgical problems are
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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
Application of diagnostic leaching techn... Application of diagnostic leaching technique for refractory gold ores Atf #231;in Kopyala CELEP O., Alp I., DEVEC H. Journal of Institute of Natural and Applied Sciences,,, 2008 (Hakemli #220;niversite Dergisi) Cilt numaras: 16; Basm
TEAGUE et al[22] studied diagnostic leaching of a refractory gold ore containing % pyrrhotite, % pyrite, % arsenopyrite and a bulk flotation concentrates. Based on the results of diagnostic leaching tests, CELEP et al[23] concluded that the refractoriness of a refractory gold ore was associated with the
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.
Malhotra, D, and Armstrong, S. (1993) quot;Characterization of Refractory Gold Ores through Diagnostic Leach Proceduresquot;, Trans. SME, 1993 SME Annual Meeting. Torres, (1994) quot;Diagnostic Leaching de Rejeitos de Fazenda Brasileiro Fase Vquot;. Cia. Vale do Rio Doce Center of Technology, Belo Horizonte, Brazil.
effects. Diagnostic leaching was used to show that mineralogy was not an important factor in the enhanced gold extraction in the presence of activated carbon for the ores. Kinetic models were developed for the leaching of gold from the ore, adsorption onto activated carbon and pregrobbing at the ore surface. A variable order empirical
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 deportment within the
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