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Article: Chloride process successfully recovers silver at the itos plant in Bolivia
- Article from:
- Engineering and Mining Journal
- Article date:
- November 1, 2000
- Author:
CopyrightCopyright PRIMEDIA Intertec Nov 2000. Provided by ProQuest LLC. (Hide copyright information)
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The Itos mill at Oruro, Bolivia, proves that the acid-ferric chloride leaching is a substitute for cyanide in recovery of silver from certain ores. The plant has been operating four years on the tailings of the former flotation plant of Corporation Minera de Bolivia (Comibol) at Oruro, 170 mi south of La Paz. Ores extracted from the Itos and San Jose mines contained complex silver sulfosalts, which were largely refractory to both flotation and cyanidation recovery.
Kappes, Cassiday & Assoc. (KCA), of Reno, Nev., conducted laboratory test work for two years to develop details of the known hydrochloric acid-ferric chloride process for application to the recovery of silver. The resulting ...