Strengthen mercury gold extraction technology is one of the latest techniques in the late 1980s the United States introduced. The method is a complete set of processes for strengthening gold extraction in a fully enclosed negative pressure pipeline, and mercury does not volatilize into the air during operation. It has shown superiority in US gold production, with a production cost of $118 per ounce of gold, a low of $227 for the smelting method and $171 for the chemical law. There is a great tendency to replace re-election - smelting and chemical methods.
The so-called "enhanced mercury" is essentially a mixture of certain reagents or ionic groups added to ordinary mercury. When this new type of enhanced mercury is formulated, the gold-trapping capacity is up to 300 times that of ordinary mercury, but as time goes on, the additive will gradually fail to reduce the gold-capturing ability, and finally it is the same as ordinary mercury. Therefore, it should be used now.
Since the mercury during operation is contaminated with impurities, air and water into contact with mercury is easily oxidized and difficult to be pre-mercury and silver-plated copper plate directly bonded to violet. In order to overcome these shortcomings, they have also developed a series of supporting technologies such as detergents, positive electric agents, oxygen barriers, mercury-plating agents and solid-strength processes. The detergent is added (mostly chromate) to make the mercury in mercury decontamination. Positively charged agents can increase the recovery rate of mercury in gold, which is similar to the increase in gold production by Chinese gold diggers adding potassium or sodium carbonate in water. Oxygen barriers slow or prevent the oxidation of mercury on the mercury plate. The mercury-plating agent allows the mercury to be directly bonded to the copper plate without first plating the silver. The solid-strength process restores or maintains a strong gold-trapping capacity by charging the enhanced mercury.
In addition, the American Italians also invented a particulate gold recovery agent and obtained a US patent on February 19, 1988. Such recovery is added together with zinc amalgam powder, can greatly enhance the ability of trapping fine gold particles, to improve the recovery of gold amalgam.
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