Current leaching and product recovery practice at Denison Mines Limited

CIM Bulletin, Vol. 72, No. 804, 1979

E. LaROCQUE and E. PAKKALA, Denison Mines Limited, Elliot Lake, Ontario

Denison Mines Limited has been processing uranium ore in the Elliot Lake area for the past 20 years. As the original concept of uranium processing has been modified somewhat over this period, the present paper will describe the current recovery practices at the Denison mill from crushing through concentrate drying and packing. Special emphasis will be placed on the leaching, ion exchange and precipitation sections of the process, with consideration being given to the entire circuit. Descriptions will be given of equipment now being used and control strategies will be discussed.
Keywords: Hydrometallurgy, Uranium metallurgy, Denison Mines Ltd., Leaching, Crushing, Grinding, Dewatering, Neutralization, Separation, Ion exchange, Precipitation.