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|Since plant start-up in January 1983, Golden Sunlight Mines Inc. has implemented several process changes and improvements. Among these are a pulp preaeration circuit and a sand tailing retreatment circuit. The preaeration circuit reduces reagent consumption during gold dissolution. The sand tailing retreatment circuit was added to recover and process separately pyrite concentrate to maintain acceptable overall gold recoveries with the more refractory sulfide ores. Research and plant operating data along with process and improvement descriptions are presented.|