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en.wikipedia.org/wiki/Mercury_(element)

Mercury is a chemical element with symbol Hg and atomic number 80. It is commonly known as .... The ancient Greeks used cinnabar (mercury sulfide) in ointments; the ancient Egyptians and the Romans used it in cosmetics. ... The richest mercury ores contain up to 2.5% mercury by mass, and even the ..... Pure Appl. Chem.

www.open.edu/openlearn/science-maths-technology/science/geology/extracting-gold-rock

Feb 27, 2007 ... We want pure gold, but gold-bearing rocks include lots of other materials such ... We used mercury to get the gold out of the powdered rock. ... This is a comparatively straightforward way of separating the gold from the rock, ... In some cinnabar ores, where the mercury sulfide concentration is high, you can ...

www.worstpolluted.org/projects_reports/display/89

A common method for separating mercury from cinnabar is to crush the ore and ... used in the gold mining process as an amalgam for separating gold from ore.

www.pbs.org/weta/roughscience/series3/treasure/extract.html

We're after pure gold, but rock that contains gold also includes lots of other ... We used mercury to actually extract the gold from the powdered rock. ... Using mercury is a pretty straightforward way of separating the two materials, since the ... Good cinnabar ore has such high concentrations of mercury sulfide that you can ...

www.britannica.com/technology/mercury-processing

mercury processing: Preparation of the ore for use in various products. ... Flotation separation by the usual procedures for sulfide ores has had some success in ... methods are effective in producing higher-grade concentrates of cinnabar for ...

www.911metallurgist.com/blog/gold-purification-methods

Mar 23, 2016 ... 2.1 Purifying Mercury; 2.2 Purifying Amalgam; 2.3 Refining Retorted Gold ... or amalgamating the gold, and thereby separating it from the admixed ... with auriferous ores, a film of gold silver amalgam forms—so long as ... The first condition for obtaining pure bullion by amalgamation is to use pure mercury.

www.madehow.com/Volume-4/Mercury.html

Much of the impetus to develop mercury ore deposits in the United States came ... Unfortunately, mercury is also a highly toxic material, and as a result, its use has ... Because cinnabar ore is relatively concentrated, it can be processed directly ... are removed by filtration, leaving a liquid mercury that is about 99.9% pure.

www.toppr.com/jee-main/learn/chemistry/metallurgy/concepts

Examples are cinnabar (HgS), an ore of mercury, sphalerite (ZnS), an ore of zinc, .... and a thin sheet of pure metal is made the cathode of an electrolytic cell containing .... This method is used for the separation of ores which are good conductor of ... same charge, hence they are thrown away and we can separate them out.

www.epa.gov/international-cooperation/artisanal-and-small-scale-gold-mining-without-mercury

May 1, 2017 ... Although many miners use mercury in artisanal and small-scale ... Concentration means increasing the amount of gold in ore or ... Panning uses water to separate heavy gold particles from other ... Panning offers miners a low cost method of gravity concentration but it requires time and skill to be effective.