E/MJ : engineering and mining journal . life is conclusion seems to agree with the experience ofeveryone who has experimented in the matter. Carborun-dum tubes and stones have been tried and abandoned,most operators returning to the textiles. It appears to be a necessary condition for serviceableflotation-cell bottoms that they be of a flexible 4-ply canvas, stitched every half-inch or so, withwhich Callows first cells were equipped, seems to answerthe purpose well. To keep it in good condition and freefrom incrustations it has to be cleaned frequently. Thisis done by
E/MJ : engineering and mining journal . life is conclusion seems to agree with the experience ofeveryone who has experimented in the matter. Carborun-dum tubes and stones have been tried and abandoned,most operators returning to the textiles. It appears to be a necessary condition for serviceableflotation-cell bottoms that they be of a flexible 4-ply canvas, stitched every half-inch or so, withwhich Callows first cells were equipped, seems to answerthe purpose well. To keep it in good condition and freefrom incrustations it has to be cleaned frequently. Thisis done by dipping an iron pipe, connected with the water October 38, 1916 ENGINEERING AND MINING JOURNAL hose, into the compartments and sweeping the canvasbottom with the jVt of water discharging from the lowerend of the pipe. In the concentrating mill of the Old Dominion a1 Globe, Ariz., an ingenious method of making a pipe e lection at an angle without the use of special fittings, which co Imoney and require time, was devised as shown in the. A WOODEN ODD-ANGLE PIPE FITTINi; sketch. By simply cutting a wooden wedge to lit snuglybetween the flanges, drilling, boring and trimming theoutside and using the customary holts and gasket-, aperfectly tight and satisfactory job was secured. Frank F. Wagner, of Denver, has invented an im-provement in hydraulic concentrators or classifiers, whichwas granted patent No. 1,193, on Aug. 8, 1916. Theobject of the invention is to provide a concentrator inwhich the metallic minerals may be separated from thegangue by the action alone of an upwardly directed cur-rent of water or oil and to separate the metallic mineralsinto different grades, varying in specific gravity. Thisis accomplished by the employment of a number of tanks,preferably cone-shaped, having their smaller extremitieslowermost. Each of these tanks is provided with a troughat the top to receive an overflow, which carries gangueor uneleaned minerals, as may In required and accordingto t
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Keywords: ., bo, bookcentury1900, bookdecade1910, booksubjectmineralindustries
