Canadian mining journal July-December 1915 . date, the process has been adopted bynearly all the other mills in the Coeur dAlone, tretfcjing lead and lead-zinc ore. notably the Cold , Hercules. Bunker Hill & Sullivan. CaledoniK *A paper presented at the annual meeting of the Utah Section, American Institute of Mining- Engineers. S<L*k« ritv. Oct 4, 1915, and to be presented at the New York meeting-, Feb., 1916. December 1, 1915 THE CANADIAN MINING JOURNAI 717 Last Chance, Hecla, Standard, etc., a total of about 50cells in all, treating from 1,500 to 2,000 tons of slimeand fine
Canadian mining journal July-December 1915 . date, the process has been adopted bynearly all the other mills in the Coeur dAlone, tretfcjing lead and lead-zinc ore. notably the Cold , Hercules. Bunker Hill & Sullivan. CaledoniK *A paper presented at the annual meeting of the Utah Section, American Institute of Mining- Engineers. S<L*k« ritv. Oct 4, 1915, and to be presented at the New York meeting-, Feb., 1916. December 1, 1915 THE CANADIAN MINING JOURNAI 717 Last Chance, Hecla, Standard, etc., a total of about 50cells in all, treating from 1,500 to 2,000 tons of slimeand fine sand feed per day. The same process too hassince been adopted by the Inspiration Copper Co., theArizona Copper Co., the Anacorda Copper Mining Co.,the Magma and other copper companies, and by theSilver King, Daly-Judge, Duquesne, and El Rayo min-ing companies, on lead, zinc and other ores, making atotal of some 680 cells operating, or in the ofinstallation, having a combined capacity of about 25,-000 to tons per Fig. 2 Pig. 2 illustrates the various elements composingthe Callow process in general. Mixing.—In the mixer A, operated by compressedair, the oil, air and water are mixed and emulsified, thesame type of apparatus being in common use in cyan-ide works. In eases where the oil. or frothing agent,can be fed into the crushing machine or tube mill, thismixer, or Pachuca tank, can be dispensed with, thetube mill discharging direct to the separatory cell. It has been conclusively proved that agitation per seis not necessary to successful flotation by the pneumaticmethod. In one of the plants, a Pachuca mixer forearh four roughing cells was installed. The pulp froma Dorr thickener was delivered to the Pachuca by abelt-and-bucket elevatur. the oil being fed into theboot of the elevator. It was found that the mixingobtained in the elevator a!«ne gave as good results aswhen the Pachucas were used; so the use of Pachucatanks in this plant was abandoned. The
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