Bulletin . Fine-sand elevator, receiving sand from second half of settling bank. 14-inch,speed 350 feet per minute. 23. Bird classifier, discharge products to trommels, overflow to Doit thickener. 24. Trommel, 3 by 4 feet, speed 14 r. p. m., |-mm. screen opening, undersize toclassifier above table 33 (seventh table). 25. Trommel, 4 by 8 feet, speed 14 r. p. m., IJ-mm. screen opening, receiving over-size from trommel 24 and coarse discharge from classifier 23. Undersize to tables. 26. Trommel, same as No. 25, receives oversize from trommel 25. Oversize goesto waste as tailing, undersize to tabl
Bulletin . Fine-sand elevator, receiving sand from second half of settling bank. 14-inch,speed 350 feet per minute. 23. Bird classifier, discharge products to trommels, overflow to Doit thickener. 24. Trommel, 3 by 4 feet, speed 14 r. p. m., |-mm. screen opening, undersize toclassifier above table 33 (seventh table). 25. Trommel, 4 by 8 feet, speed 14 r. p. m., IJ-mm. screen opening, receiving over-size from trommel 24 and coarse discharge from classifier 23. Undersize to tables. 26. Trommel, same as No. 25, receives oversize from trommel 25. Oversize goesto waste as tailing, undersize to table feed. 27-32. Concentrating tables, feed consisting of vmdersize from trommels 25 and 26and oversize from trommel 24. 33-36. Concentrating tables, feed consisting of undersize from trommel 24 andoverflow from classifier to table 33. Overflow from classifier to table 36 goes to Dorrthickener. 37-40. Concentrating tables, receiving spigot discharge from V tank 20. 40 MINING AND MILLING OF LEAD AND ZINC /^/c/cy//hg Oye/y/otp ^yoona^ ^^^I
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
