gold ore sulfides

  • Gold processing | Britannica

    Gold processing, preparation of the ore for use in various products. Native gold is the most common mineral of gold, accounting for about 80 percent of the metal in the Earth's crust. It occasionally is found as nuggets as large as 12 millimetres (0.5 inch) in diameter, and on rare occasions ...

  • Mining and Extraction: Oxide Ores - processes for ...

    Most of the copper ores mined today are oxide or sulfide ores. Extraction of sulfide ores is covered in more detail in Copper Mining and Extraction: Sulfide Ores (11–14), but is introduced here because an important by-product of this process is used for the extraction of oxide ores. Pyroprocessing Sulfide Ores Provides Acid for Leaching

  • Gold Mining Process Development – Denver Mineral Engineers

    with gold molecules. With many sulfide ores, the ore cannot practically be ground down fine enough to expose the gold particles. The objective of pretreatment for these ores is to remove enough of the sulfide so that at least a small portion of all gold particles are directly exposed to the elements.

  • Cyanide leaching of gold in solutions containing sulfide ...

    Request PDF on ResearchGate | Cyanide leaching of gold in solutions containing sulfide | A large proportion of the gold processed in the 21st century will be recovered from sulfide ores. Since the ...

  • Polymetallic sulfide flotation of gold ore - Froth ...

    I have been involved in assaying a rock pit with sulfide ore for a couple of years. We have done gravity concentration tests and the ore loses 75% of the gold and silver value when you gravity concentrate. We did a down and dirty flotation test with biodiesel and successfully produced 33 opt gol

  • What Does Gold Ore Look Like? | Sciencing

    What Does Gold Ore Look Like? ... Evidence of quartz and sulfide minerals surrounding gold veins may be clear. Gold ore can look like quartz with streaks or spotty areas of gold. Expert Insight. The Environmental Protection Agency says that gold is commonly alloyed with silver and other metals. So indicators of the presence of sulfides like ...

  • Process to Recover Gold from Sulfide Ores - GOLD ...

    May 27, 2016 · This subject is a little off the topic of this website but Im trying to get some feedback on a technology I have been working on the past few years that was focused on remediation of toxic waste. I believe it has an application to recover gold from sulphide ores by eliminating the current roastin...

  • Rebellious Ores: Sulfides, Selenides and Tellurides

    Gold and silver contained inside some sulfides amalgamates poorly, and in those early days, amalgamation was the chief recovery method for hard rock ores. The old timers developed the pan processes where they ground up the ore and amalgam mixture for hours at a time (the Washoe Process), and for some ores that did the job.

  • Ore deposits formed by oxidation and supergene enrichment

    The importance of secondary enrichment of gold in lateritic regions was realized only during the gold boom of the 1980s, especially in Australia. 2. The second circumstance involves mineral deposits containing sulfide minerals, especially copper sulfides, that .

  • NATIVE GOLD (Au) - Amethyst Galleries: Gold

    Native gold wires emerging from massive white quartz can make for a visually stunning specimen. A few of the minerals that bear gold in their respective formulas are in a subclass of sulfides called the tellurides. The element gold seems to have an affinity for tellurium and this is one of the only elements that gold can bond with easily.

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  • Gold processing | Britannica

    Gold processing, preparation of the ore for use in various products. Native gold is the most common mineral of gold, accounting for about 80 percent of the metal in the Earth's crust. It occasionally is found as nuggets as large as 12 millimetres (0.5 inch) in diameter, and on rare occasions ...

  • Gold Geology & Prospecting, Arizona - Gold in Arizona

    Gold Geology & Prospecting, Arizona ... A carbonate cap with sulfide-rich primary ore was found and by 1917, New Cornelia was developed as Arizona's first open pit. Total by-product gold through 1959 was about 1 million ounces recovered with 6.3 billion pounds of copper. ... In 1901, rich gold ore was found in shallow prospects dug on the Tom ...

  • CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING OF .

    Chloride–hypochlorite oxidation and leaching of refractory sulfide gold concentrate 65 Fig. 3. Particles size analysis of gold concentrate Fig. 4. XRD analysis of gold concentrate obtained by flotation Table 1. Major elements composition of the ore and floated concentrate