The effect of Pb(NO^sub 3^)^sub 2^ addition on the processing of blended Fort Knox and True North ores at the Fort Knox mine, Alaska

From: Minerals & Metallurgical Processing | Date: November 1, 2003| Author: | Copyright information

Abstract

Fairbanks Gold Mining Inc. (FGMI) began blending and processing True North ore at its Fort Knox mill on April 12, 2001. Gold extraction subsequently dropped from 88% to 71% during the last week of April 2001. Twenty-five percent of the gold values remaining in the leach tailings were gravity-recoverable free gold. Significant quantities of stibnite and arsenopyrite were also identified in the tailings. In laboratory bottle-roll tests, the gold extractionfrom a composite of leach circuit feed collected during the same period was 72.6% when leached at an average NaCN concentration of ...

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