. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . p-batteriesand the settling-tanks. The silver-bearing base metals are thus concentrated and smelted,while the tailings run to the settling-tanks and are then treated in the usual manner. Thisprocess was introduced quite successfully at the mill of the Combination Mining and MillingCo., Black Pine. Deer Lodge County, Montana, according to C. W. Goodale and W. Akers{Trans. A. I. M. vol. xviii. p. 242). The ore was
. Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics . p-batteriesand the settling-tanks. The silver-bearing base metals are thus concentrated and smelted,while the tailings run to the settling-tanks and are then treated in the usual manner. Thisprocess was introduced quite successfully at the mill of the Combination Mining and MillingCo., Black Pine. Deer Lodge County, Montana, according to C. W. Goodale and W. Akers{Trans. A. I. M. vol. xviii. p. 242). The ore was quartzose with galena, lead, copper, zinc, anda little suli>hur, a considerable proportion of the silver being carried by the base minerals. Themill had in stamns. tlie nnln from which was passed over four Frue vanners. The tailings mill had 10 stamps, the pulp from which was passed 520 MILLS, SILVER. from the latter weie settled and amalgamated. During the year ending May 31, 1889, 9,0G1tons of ore, of an average assay of 22-67 oz. silver per ton, were crushed. There were pro-duced 541 tons of concentrates, averaging 13G oz. silver per ton, which were sold to the lead-. Fio. l.—Drj--crushing silver mill. smelters. The total saving by concentration and amalgamation was 8345 per cent, and thecost of the combined process . per ton. The Boss continuous jjrocess is a comparatively recent improvement upon the system ofpan amalgaination. In this the pulp flows directly from the stamp-batteries to the pans, andthe use of settling-tanks is done away with. The ore coming to the mill, it is dumped overgrizzlies and passes through rock-breaker and ore-feeders into the batteries in the usualmanner. The pulp from the batteries is then conveyed in pipes to the .special grinding-pansplaced immediately below and in front of batteries. In these pans, all grinding of the pulpis done, the product of ten stamps passing through two in succession. By their use thecapacity of the stauips i
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Keywords: ., bookcentury1800, bookdecade189, booksubjectmechanicalengineering
