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Differential flotation mill, Highland Mary mill
Barbre, Thos. J.
Barbre, Thos. J.
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Attached label. Caption reads: "This is interior view of typical Colorado lead-zinc differential flotation mill. Left background is the Marcy ball mill used for grinding the ore. Right background is a picture of Akins spiral classifier which separates the finely ground ore and water (pulp) from the coarser pulp which has not been ground to a fine enough state to liberate the lead and zinc minerals from each other and the gangue oversize being returned to the mill for further grinding. In the foreground is a bank of Denver Equipment Company lead flotation cells and zinc flotation cells. At the extreme lower left corner is a dry reagent feeder. Highland Mary. No. 1284."
Interior view of a differential flotation mill, with workmen, Highland Mary mill.
Interior view of a differential flotation mill, with workmen, Highland Mary mill.
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Copyright retained by Colorado Mining Association.