Technical paper . A. MILL NEAR CUBA CITY, JJ. MILL NEAR PLATTEVILLE, WIS. MIXING AND MILLING OF LEAD AND ZIXC ORES. 21 CRUSHING. The undersize material, 5 inches or less in diameter, from the oredumped on the grizzly bars falls into the mill hopper. From thehopper the ore is fed to an incline leading to a crusher of the Blaketype, which reduces the larger material to pieces about 2 inches orless in diameter, depending on the setting of the jaws of the crusherat their lower end. Instead of an incline it might be possible to use a perforated shak-ing screen having three-fourths-inch holes,
Technical paper . A. MILL NEAR CUBA CITY, JJ. MILL NEAR PLATTEVILLE, WIS. MIXING AND MILLING OF LEAD AND ZIXC ORES. 21 CRUSHING. The undersize material, 5 inches or less in diameter, from the oredumped on the grizzly bars falls into the mill hopper. From thehopper the ore is fed to an incline leading to a crusher of the Blaketype, which reduces the larger material to pieces about 2 inches orless in diameter, depending on the setting of the jaws of the crusherat their lower end. Instead of an incline it might be possible to use a perforated shak-ing screen having three-fourths-inch holes, and play a stream ofwater on the material passing over the screen. The finer materialwould be washed through, thus eliminating much unnecessarycrushing and increasing the capacity of the crusher. The plan wouldalso reduce somewhat the proportion of fine material produced. Theundersize from the coarse screen would go to a set of rolls or directlvto the elevator to be raised to the trommel at the head of the rougherjig. The benefits obtainable
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
