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  • Patent US20130291686 - Sulfide ore leaching process - Google ...

    Nov 7, 2013 ... The present invention discloses a new process for leaching sulfide minerals ... been known to improve copper leaching extraction from chalcopyrite ore ... for chalcopyrite leaching (temperature and ORP control) in a heap ..... Additionally, a smaller leaching reactor reduces the required energy for heating.

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  • Copper Ore Types: Sulfides vs. Oxides

    Jul 19, 2016 ... A primer on copper ore types and how they're processed. ... facebook · twitter · linkedin · google plus · Youtube ... of copper via a solvent extraction and electrowinning (SX-EW) process. ... oxidation heap leach process to oxidize the sulfides to sulfuric acid. ... Western Copper and Gold Select All Select None.

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  • Exploitation of Bacterial Activities in Mineral Industry and ... - Hindawi

    Nov 4, 2013 ... Its energy for growth is obtained from the oxidation of ferrous iron, insoluble .... In this process, the copper mineral is leached in the presence of bacteria in the .... Bioleaching of copper and uranium ores by heap leaching resulted in .... The biological pretreatment of refractory gold ores is based on the ability...

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  • Gold & Silver - Department of Energy

    Silver occurs in the metallic state, commonly associated with gold, copper, lead, and ... When the gold or silver ores lie close to the surface, they often can be uncovered by ... large sites by progressive extraction along steps or benches. .... Heap leaching is the least expensive process; therefore, low value ores are most often.

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  • Decreasing Ore Grades in Global Metallic Mining: A Theoretical ...

    Nov 7, 2016 ... copper, the study has shown that the average copper ore grade is decreasing over time, while the energy consumption and the total material production in the mine ... economically relevant minerals, such as gold, lead, zinc and copper, ... ores) a heap leaching process is combined with solvent extraction.

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  • Patent US6319389 - Recovery of copper values from copper ores ...

    Nov 20, 2001 ... During the solvent extraction operation, free sulfuric acid is produced ... Process according to claim 1, wherein the copper ore is a sulfide ore that .... The conventional milling/flotation process is mineralogy dependent, and is energy, capital ... Heap leaching of secondary copper sulfides of chalcocite and...

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  • Heap Leach: Mining's breakthrough technology

    Aug 20, 2015 ... Evolution of copper ore mill grade at the Bingham Canyon mine, USA. ... Generally, the HL process involves the following steps: ... Currently, HL technology is successfully used to extract gold, silver, copper, ... Copper Heap Leaching (Solvent Extraction-Electrowinning – SX-EW) ... Source: Google Earth.

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  • Patent WO2012114165A1 - Energy efficient recovery of ... - Google

    Aug 30, 2012 ... The process as claimed in claim 1 , 2 or 3, wherein the Base Metals include Ni, Co, Cu and/or Fe. 5. ... process liquors from an exothermic bio-leaching heap. ... This invention relates to an extraction method for the recovery of ... Metals (gold and silver); Base Metals (including nickel, cobalt and copper) from...

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  • Gold cyanidation - Wikipedia

    Gold cyanidation is a metallurgical technique for extracting gold from low-grade ore by converting the gold to a water-soluble coordination complex. It is the most commonly used process for gold extraction. Production of reagents for mineral processing to recover gold, copper, zinc ... Cyanide leaching "heap" at a gold mining operation near Elko, Nevada.

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  • Patent US5316567 - Hydrometallurgical copper extraction process ...

    May 31, 1994 ... A process for the extraction of copper from a sulphide copper ore or ... the bed of low-grade copper ore or granular rock is in the form of a heap and the ... as gold and silver, the process of the invention includes a filtration step or other .... 1998, Energy Research Group, Comprehensive energy producing...

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