Crushing & Screening Plant
While jaw and gyratory crushers compete for primary crushing, ... the primary crushing is done by two Allis-Chalmers size 8 gyratories. They are driven by 70-hp. motors and reduce the ore to 4½ in. ... The plant is completely equipped for dust control with some 40,000 cu. ft. per min. of air drawn through the cyclones, and 60,000 cu. ft. per ...