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From 1974 to 1983 attempts of "Irgiredmet" and the Laboratory of the Berikul gold extraction factory (GEF) have been repeatedly made to extract gold from these cakes; the weighted average content of gold and silver in them were 4.9 and 20.7 g/t, respectively. The main mass of gold is represented by particles with a fineness of 10 –50 µm.

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Möss spectroscopy has been successfully used in investigation of the gold compounds present in ores and the gold species which occur during the process metallurgy of …

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7. AIMS AND OBJECTIVES To extract gold from E-wastes by sustainable and environment friendly method. To compare and evaluate the gold extraction efficiency from chemical and bioleaching method using chitosan. To explore the potential of bioleaching method, as an environmental friendly and economically efficient technology for extracting metals from E …

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The focus of this work is to establish a hydrometallurgical technique for efficiently extracting gold from the aggregated gold-rich concentrate produced by a mining facility in one of Kazakhstan's deposits. The leaching techniques applied to gravity-flotation concentrates include hydrometallurgical gold recovery processes using the surfactant sulfanol and the oxidizing …

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Gold extraction or recovery from its ores may require a combination of comminution, mineral processing, hydrometallurgical, and pyrometallurgical processes to be performed on the ore.Gold mining from alluvium ores was once achieved by techniques associated with placer mining such as simple gold panning and sluicing, resulting in direct recovery of small gold nuggets and …

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Gold Extraction. The effect of pH value on gold extraction for various ore types is shown in Figure 28.4. Greatly increasing pH value has a beneficial effect on gold extraction for both oxide and sulfide ores and stabilizes ∼pH 9.5–10.0, whereas for some carbonaceous ores, pH value has no apparent effect.

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The Extractive Metallurgy of Gold | SpringerLink

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The Chemistry of Gold Extraction

A survey of the technological advances in gold extraction techniques, this text emphasizes practical applications and traces the actual process of extraction from ore mineralogy to bullion production. The main hydrometallurgical processes involved, such as leaching, are also covered.

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Gold Extraction and Recovery Processes For …

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Gold, its occurrence and extraction : embracing the …

Gold, its occurrence and extraction : embracing the geographical and geological distribution and the mineralogical characters of gold-bearing rocks; the peculiar features and modes of working shallow placers, rivers, and deep leads; hydraulicing ... a bibliography of the subject; and a glossary of English and foreign technical terms

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Of greater importance to the extractive metallurgist is the chemistry of gold complexes in aqueous solutions, and this is a far broader subject.

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