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2003•Journal of Mineralogy and PetrologyRequires access

A STUDY ON THE PROPERTY OF A REFRACTORY GOLD ORE FROM SICHUAN PROVINCE

Song Hang

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Abstract

The property of a gold ore obtained from Sichuan province is studied. This gold ore represents a unique class of refractory gold ores in general, because not only does gold encapsulation by iron sulfide occur, but this ore also contains organic carbonaceous and clay matter. Bacteria Hst can oxide all sulfide minerals in ore and improve the gold extraction effectively. The degree of gold liberation is mainly depends upon the percentage of pyrite oxidation by Bacteria. If the leaching percentage of iron from ore is in excess of 90%, the gold liberation is almost completely, and the gold extraction can reach 90% or more by cyanidation. The results presented in this study show that the refractory nature of this gold ore was originated in gold fine encapsulated by iron sulfide minerals, but organic carbonaceous and clay matter in ores have not effect on leaching of gold.

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What this paper is about

The property of a gold ore obtained from Sichuan province is studied. This gold ore represents a unique class of refractory gold ores in general, because not only does gold encapsulation by iron sulfide occur, but this ore also contains organic carbonaceous and clay matter. Bacteria Hst can oxide all sulfide minerals in ore and improve the gold extraction effectively. The degree of gold liberation is mainly depends upon the percentage of pyrite oxidation by Bacteria. If the leaching percentage of iron from ore is in excess of 90%, the gold liberation is almost completely, and the gold extraction can reach 90% or more by cyanidation. The results presented in this study show that the refractory nature of this gold ore was originated in gold fine encapsulated by iron sulfide minerals, but organic carbonaceous and clay matter in ores have not effect on leaching of gold.

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Available abstract

The property of a gold ore obtained from Sichuan province is studied. This gold ore represents a unique class of refractory gold ores in general, because not only does gold encapsulation by iron sulfide occur, but this ore also contains organic carbonaceous and clay matter. Bacteria Hst can oxide all sulfide minerals in ore and improve the gold extraction effectively. The degree of gold liberation is mainly depends upon the percentage of pyrite oxidation by Bacteria. If the leaching percentage of iron from ore is in excess of 90%, the gold liberation is almost completely, and the gold extraction can reach 90% or more by cyanidation. The results presented in this study show that the refractory nature of this gold ore was originated in gold fine encapsulated by iron sulfide minerals, but organic carbonaceous and clay matter in ores have not effect on leaching of gold.

Key concepts: Gold extraction, Pyrite, Gold cyanidation, Sulfide minerals, Gold ore, Sulfide, Leaching (pedology), Metallurgy

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