amalgamation process

amalgamation process

(əmăl'gəmā`shən), in particular, a method to extract gold and silver from ores. The ore is crushed and treated with mercurymercury
or quicksilver
[from the Roman god Mercury], metallic chemical element; symbol Hg [Lat. hydrargyrum=liquid silver]; at. no. 80; at. wt. 200.59; m.p. −38.842°C;; b.p. 356.58°C;; sp. gr. 13.55 at 20°C;; valence +1 or +2.
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, in which the metal dissolves. The amalgam is heated and the mercury evaporates, leaving pure gold or silver. The process has been criticized as an environmental and occupational threat due to the extreme toxicity of mercury.
References in periodicals archive ?
The corporation was established just after the council amalgamation process from two separate library services that existed within the region.
Organizing two expeditions of German scientists and miners to Mexico and Peru, Elhuyar led the expedition to Mexico in order to introduce a new amalgamation process developed by the Austrian Ignaz von Born.
The high grades were necessary for the high-cost amalgamation process that was used at the time to recover the silver.
He has embraced the current port reform and implementation process in the Southern Ports Authority context, and is ideally suited to take over from Vic Justice in the ongoing amalgamation process for the Kimberley Ports Authority.
With a local source of mercury, the amalgamation process was adopted to refine silver in Potosi, Bolivia, in the early 1570s.
The report said the amalgamation process had been managed well.
As part of the planned amalgamation process, RCI intends to cancel the currently outstanding $1 billion Cable bank credit facility, the $700 million Wireless bank credit facility and the $600 million bank credit facility of RCI's wholly owned subsidiary, Rogers Media Inc.
But they added the "many barriers" to raising standards, which the school encountered during the amalgamation process, have now been resolved.
Many tenants are elderly and looking to retire, which would help push forward the amalgamation process.
Northeast Scotland, the jumping off spot for the Orkney Islands, was where I was appointed to assist in a the Wick Old Parish congregation and take part in its amalgamation process with the former Free Church congregation just a block away.
Hollick and Siegel conceptualize the amalgamation process as having three phases: "decision-making," transition and implementation.
A 3 % savings in municipal expenditures, by itself, hardly seems worth the enormous political and organisation change required for the amalgamation process, but, in any case, was not realised.