Technical paper . C-Pb= Lead concentratesC-Zn = Zinc concentratesM= Middlingscu= Cnata Y PondFigure 4.—Arrangement of a representative lead and zinc concentrating mill in the Wisconsin district,one-jig system. /, hopper, capacity 150 tons; 2, crusher, 14-inch Blake type; 3, rolls, 24-inch; 4, elevator(feed); S, trommel, 36 by 96 inches, with J-inch round perforations; 6, rolls, 24-inch; 7, jig, eight 30 by 12inch cells; 8, elevator (middlings and chats); 9, rolls (for middlings and chats), 18-inch; 10, elevator(tailings). 24 MINING AND MILLING OF LEAD AND ZINC ORES. C-Pb=Lead concentratesC-Zn=
Technical paper . C-Pb= Lead concentratesC-Zn = Zinc concentratesM= Middlingscu= Cnata Y PondFigure 4.—Arrangement of a representative lead and zinc concentrating mill in the Wisconsin district,one-jig system. /, hopper, capacity 150 tons; 2, crusher, 14-inch Blake type; 3, rolls, 24-inch; 4, elevator(feed); S, trommel, 36 by 96 inches, with J-inch round perforations; 6, rolls, 24-inch; 7, jig, eight 30 by 12inch cells; 8, elevator (middlings and chats); 9, rolls (for middlings and chats), 18-inch; 10, elevator(tailings). 24 MINING AND MILLING OF LEAD AND ZINC ORES. C-Pb=Lead concentratesC-Zn=Zinc concentratesM =MiddlingsCh= Chats. Figure 5.—Arrangement of a representative lead and zinc concentrating mill in the Wisconsin district,rougher-and-cleanersystem. Chopper, capacity 150tons; 2,crusher, 14-inch Blake type; S,rolls,30-inch;4, elevator (feed); 5, trommel, 36 by 96 inches, with J-inch round perforations; 6, rolls, 24-inch; 7, rougherjig, seven 30 by 42 inch cells; 8, elevator (middlings); 9, cleaner jig, seven 28 by 42 inch cells; 10, elevator(chats and middlings); 11, rolls, 24-inch; 12, elevator (tailings); 13, settling box. MINING AND MILLING OF LEAD AND ZINC ORES. 25 grade or finely disseminated ores, as the losses of fine material aretoo great. If the lead content is fairly high a good zinc product isnot easily possible with the single jig. Most jigs used in the one-jig system have a battery of eight cellsdivided into two sections; that is, the shaft line connecting the eccen-trics of the plungers is hi two sections, the plungers of the firstfour cells being driven separately from those of the last f
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
