The Conversion of a Manual A. C. Hoist to a Semi-Automatic D. C. Hoist at Lynn Lake
R. W. Drybrough Sherritt Gordon Mines Ltd., Lynn Lake, Manitoba
The program to increase production at Sherritt Gordon's Lynn Lake property, which began in 1956, included increasing the rope speed and the horsepower of the ore hoist at the "A" shaft. Because of the limited power supply from the two 7,000-hp. hydroelectric plants, and the 3,600 hp. predicted for the combined hoisting requirements of the three production shafts, it was considered desirable to lessen the impact of this type of load on the relatively small power system by equipping all future hoisting arrangements with Ward Leonard direct-current drives.
Control, Controls, Conversion, Hoists, HP, hp, Lynn Lake, Manitoba, Shaft Ore Hoist-initial .. .. ., Motors, Ore, Ores, Shafts