Cyanide process | metallurgy | Britannica
Cyanide process, also called Macarthur-forrest Process, method of extracting silver and gold from their ores by dissolving them in a dilute solution of sodium cyanide or potassium cyanide. The process was invented in 1887 by the Scottish chemists John S. MacArthur, Robert W. Forrest, and William Forrest. The method includes three steps: contacting the finely ground ore with the cyanide,The International Cyanide Management Code: Ensuring Best,,Jan 01, 2016· The International Cyanide Management Code for the Manufacture, Transport and Use of Cyanide in the Production of Gold (Cyanide Code or Code) is the internationally recognized benchmark for best management practices for cyanide used in the gold mining industry (ICMI, 2015a).Based on the most recently available data, more than half of the world's 2014 commercial gold production from primary gold,The World’s First Breakthrough Technology To Eliminate the,,Jun 10, 2019· Traditionally, gold mining has depended on harsh chemicals such as cyanide and mercury to extract gold from ore. This has left our planet with a legacy of toxic waste which is harmful to health and the environment. For over 50 years, the industry and leading research institutions have been trying to find such an alternative without much success.