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Mar 11, 2011· In this book the recovery of gold using mercury was also described. Gold and Mercury will combine into a substance called an amalgam, and once again the gold can be separated from the mercury by the application of heat by heating the amalgam in a retort that recovers the mercury by distilling its vapor back into metallic mercury. This is a process that has been known for centuries.

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5. Where do the world's supplies of mercury come from?

There are also reports of smallscale, artisanal mining of mercury in China, Russia (Siberia), Outer Mongolia, Peru, and Mexico. It is likely that this production serves robust local demand for mercury, often for artisanal mining of gold – whether legal or illegal.

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In many countries, elemental mercury is used in artisanal and smallscale gold mining. Mercury is mixed with goldcontaining materials, forming a mercurygold amalgam which is then heated, vaporizing the mercury to obtain the gold.

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Dec 12, 2017· I use mercury to process my concentrates from my Knudsen centrifuge. Mainly because it's heaps faster then other methods but also because if done right it gets everything. My material is from hard rock mining and has a wide variety of different sized gold making it .

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Artisanal and SmallScale Gold Mining Without Mercury EPA. Feb 22, 2018 They may also help miners market their gold at higher prices. Many artisanal and smallscale miners are achieving high rates of gold recovery without mercury, A motor is used to rotate the pan continually as concentrate is fed onto the For small scale centrifuges, cycles usually last around hours.

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