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EVALUATION OF TECHNOLOGY FOR CONTROL OF ARSENIC EMISSIONS AT THE CAMPBELL RED LAKE GOLD SMELTER
Citation:
Marchant, G. AND R. Meek. EVALUATION OF TECHNOLOGY FOR CONTROL OF ARSENIC EMISSIONS AT THE CAMPBELL RED LAKE GOLD SMELTER. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-80/141.
Description:
The Campbell Red Lake Mines Gold Smelter at Balmerton, Ontario, Canada, has developed and implemented a successful control strategy for arsenic emissions from a nonferrous smelting operation. The Red Lake smelter uses cyclones and a hot electrostatic precipitator to recover metal values from roaster dusts with subsequent air quenching to condense (or desublime) arsenic trioxide which is recovered in a low-temperature baghouse. This report presents the results of the test program conducted at the Red Lake gold smelter during the period September 18-28, 1978. The overall efficiency for the control of particulate emissions using a combination of a hot electrostatic precipitator, an air quench in a mixer-cooler, and a cold baghouse exceeded 99.9%. Collection of particulate arsenic in the baghouse was greater than 99.95%; however, overall arsenic collection efficiency in the baghouse was slightly less due to passage of As2O3 vapors. Total arsenic emissions from the system were only 11 mg/dscm (6.8 x 10 to the minus 7 power lb/dscf or 0.20 Kg/hr (0.44 lb/hr)).