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The reduction is accomplished by discharging ore from the charge hopper 14 through line 20 into the reactor 24, which may be of the type generally shown in the Keith et al. patent, 2,995,426.
EPA 530 R 94 013 NTIS PB94 170 305 TECHNICAL RESOURCE UMENT EXTRACTION AND BENEFICIATION OF ORES AND MINERALS VOLUME 2 GOLD August 1994 U.S. Environmental Protection Agency
Gold ore beneficiation in ancient Egypt using dry and wet attachment processes. In ancient Egypt before 2000 BC, gold was mined on a large scale . Egypt was rich in gold, especially after its conquest of Nubia. Deposits with veins of gold bearing quartzite were found in the eastern desert of Egypt.
If the gold can not be concentrated for smelting, then it is leached by an aqueous solution: . The cyanide process is the industry standard.; Thiosulfate leaching has been proven to be effective on ores with high soluble copper values or ores which experience preg robbing: the absorption by carbonaceous components which preferentially absorbs gold and gold cyanide complexes.
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Gold ore beneficiation is a processing to get gold out of ores. gold in the mineral is extremely low, in order to extract the gold, ore crushing and grinding is needed and using dressing method to separate gold from the gold ore. gravity separation and flotation separation is mainly methods in gold ore beneficiation plant. gravity separation ...
1983 07 15 Priority to US06/514,128 priority Critical patent/US4543178A/en 1983 07 15 Assigned to MOBIL OIL CORPORATION reassignment MOBIL OIL CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: GOLDSTEIN, THEODORE P. 1985 09 24 Application granted granted Critical 1985 09 24 Publication of US4543178A publication Critical patent/US4543178A/en
gold ores are often characterized by the low gold extractions within a conventional cyanide leach ing 3 4. The refractoriness of gold ores can result primarily from the inherent mineralogical features with par ticular reference to the mode of presence and association of gold, and to the presence o f carbonaceous matter 3.
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