cyanide process

American  

noun

1. a process for extracting gold or silver from ore by dissolving the ore in an alkaline solution of sodium cyanide or potassium cyanide and precipitating the gold or silver from the solution.

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cyanide process British  

noun

1. Also called: cyaniding.  a process for recovering gold and silver from ores by treatment with a weak solution of sodium cyanide

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Etymology

Origin of cyanide process

First recorded in 1885–90

Example Sentences

In Kershaw, OceanaGold’s cyanide process kills off virtually all of the toxic material before it is released into the tailings pond, said Scott McDaniel, the OceanaGold environmental manager.

From Washington Times • May 7, 2017

At the time that the outcrop in the Rand become exhausted, what is today known as the "cyanide process" had never been used in that part of the world.

From An African Adventure by Marcosson, Isaac Frederick

The great example of this operation is the familiar "cyanide" process.

From Marvels of Scientific Invention An Interesting Account in Non-technical Language of the Invention of Guns, Torpedoes, Submarine Mines, Up-to-date Smelting, Freezing, Colour Photography, and many other recent Discoveries of Science by Corbin, Thomas W.

The improved dioxide cyanide process was adopted about 1895.

From Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6 "Cockaigne" to "Columbus, Christopher" by Various

Again the milling results were not good, and what it demanded was the cyanide process.

From The Plunderer by Duer, Douglas