Amalgamation method mentioned silver
With silver mercury trap silver ore, gold has been extracted and other metals, minerals and gangue separation process, is one of the silver ore silver method. Of mercury on the pulp of fine gold, silver has a selective wetting (trap) role, generate amalgams with gold, silver, gold, silver amalgam separation by distillation of volatile mercury. This method is mainly used for the treatment of native silver, native gold, silver, and angular silver mines and other minerals.
Mixed mercury Fatih silver equipment
Amalgamation method began in China late Qin and early Han Dynasty (200 BC), and later spread to Europe, Asian countries, from the early 16th century to the late 19th century, was the main method of extracting silver, mercury causes serious environmental pollution has been rarely use only as a re-election, a supplementary means of flotation, cyanidation to mention the silver method.
Silver mixed with mercury extraction by grinding, sieving, re-election, with the amalgamation of extrusion process such as distillation, melting composition. Silver ore with a ball mill, rod mill, pulverized to below 0.2mm then sieve to remove coarse lean ore; then sluice, jump Jig, hydrocyclones, suede chute and shaking re- election, the black sand concentrates containing silver and gold.
The black sand concentrates mill
The black sand concentrates in the mill amalgamation board or amalgamation barrel amalgamation, silver and gold into the mercury ointment. Then trap chute grader separation of mercury ointment and tailings. Containing precious metals high amalgamation tailings send the smelter or cyanide mill for further processing recover the precious metals.
Isolated the cream of the mercury in the tailings after grinding in the mill and water, solid inclusion loose and free, scraper or magnetic separation to remove impurities on the surface, access to clean amalgam. Qi and then clean the mercury load thick canvas bag, squeeze to remove excess mercury, amalgam of mercury from 30% to 60% dry. Will dry the amalgam into the cast iron kettle or steel stills, 1073K temperature distillation of the volatile mercury and condensate recovery, silver and gold content of more than 90% of sponge.
Sponge and flux mixing, melting temperature of 1273 ~ 1473K, get gold and silver alloy ingots. Gold and silver alloy ingots gold silver anode mud with black powder gold electrolysis have gold, first by silver electrolysis of silver;
Amalgamation equipment and processes
Some new equipment and processes of amalgamation in the 1980s, new devices such as swirl the amalgamation continuous amalgamation, dry-type electrical amalgamation. The United States developed an “enhanced mercury, its ability to trap gold, silver is 300 times the mercury. The amalgamation of the new technology in a closed vacuum pipe to prevent the pollution of the environment of mercury volatilization, only 43% of the re-election of a smelting costs.
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