Gold recovery from limited global resources has gained increasing attention due to a
growing demand for gold and heightened social awareness of the high toxicity and the …

The pretreatment of carbonaceous material in double refractory gold ores (DRGO) is
necessary to decrease preg-robbing of gold and maximize gold recovery. DRGO contains of …

Double refractory gold ores, such as Barrick's Goldstrike ore, contain both pyrite and
carbonaceous matter and the latter results in the loss of gold from solution during cyanide …

The effect of biooxidation (BIOX) pre-treatment of refractory gold concentrates using
mixotrophic and chemolithotrophic bacteria on the gold extraction during cyanidation of the …

The less predictive nature of alkaline cyanide leaching, owing to its complex functional
relationships, render most processing plants unproductive and subsequent shutdown. In this …

Gold ores containing carbonaceous matter and sulphidic minerals are generally referred to
as double refractory. Extraction of the gold from such ores usually requires an oxidation step …

Carbonaceous gold mines are important refractory gold ores. The previous results
demonstrate that the carbonaceous matter is mainly composed of elemental carbon, organic …

It is known that the presence of sulphidic minerals in the cyanidation of gold ores may cause
significant consumption of oxygen supplied in the injected air. This may result in dissolved …

Refractory gold ores are difficult to treat, and several techniques have been proposed with
the aim of increasing gold extraction. A necessary prerequisite for processing such ores is to …

A process of biooxidation followed by thiosulfate leaching of gold from refractory gold
concentrate was investigated. Mineralogical studies on the concentrate showed that very …