No application is too large, too difficult, or too complex for this Denver “Sub-A” flotation Machine. Now ONE Denver “Sub-A” will handle the pulp from several large grinding circuits, thus simplifying the flotation operation. This Denver “Sub-A” will handle 3,000 tons of dry ore at 40% solids down to 1,000 tons at 15% solids. The volume of each cell is 100 cubic feet the largest of any mechanical type cell yet built. Where large tonnages must be treated by a rougher machine at lowest cost. This unit is ideal for such plant. Wherever installed the Denver “Sub-A” will give highest metallurgical efficiency per horsepower.

CELL DESIGN: In designing this large cell simplicity and flexibility have been retained. Including the exclusive method of circulating pulp from cell to cell by gravity. An impeller of sloping design, in combination with a new diffuser plain, allows operation at a higher speed with no increase in horsepower and thus higher speed produces better aeration with rougher froth per unit of cell surface. The diffuser plate and impeller can be made of molded rubber having 6 to 11 times the life of hard iron. Rubber bottom liners and heavy metal side liners minimize interior cell wear. Already outstanding in the flotation field, these Denver “Sub-A” advances are further reducing the present low flotation costs.

“No bearing troubles,” That is “the Secret of 24-hour operation.” Says the Denver Equipment Co. of their “Denver Sub-A” (Fahrenwald) Flotation Machine with SKF’s on the impeller shafts. The lower bearings are self-aligning and the upper ones deep-groove. Both types bring the utmost dependability to the locations in which they are used. Continuous performance and low maintenance costs result through installing “the right bearing for the right place” . . . SKF. Sealed housings fully protect the bearings from moisture and climate lubricant leakage. All these advantages justify the SKF’s and prove to Denver that “SKF Performance certainly takes Preference Over Price.”