File:Transactions (1871) (14767784512).jpg

Identifier: transactionsmining35amer (find matches)
Title: Transactions
Year: 1871 (1870s)
Authors: American Institute of Mining, Metallurgical, and Petroleum Engineers
Subjects: Mineral industries
Publisher: New York (etc.)
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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can thetrouble be placed,—a disadvantage which is aggravated in thecase of the stamp, by the vibration to which it is continuouslysubjected. Most important of all, however, is their excessivelylarge consumption of steam, the total for the mill amountingto 1 ton of good-quality coal to 7 tons of ore crushed, inclusiveof the quantities required to operate the rock-breaker, to pumpthe battery-water and to run the ore-concentrator. The steamis condensed and returned hot to a Cornish boiler which sup-plies the mill-plant. 3 Trans., xxvi., 545. 708 Till: GOLD DISTRICT OF CANUTILLO, CHILE, S. A. The mortar-boxes are provided with back-plates and withLip-plates fixed outside immediately under the screens. Mer-cury is added in quantities varying with the richness of the ore,the average being 60 g. per 24 hours. Steel-wire battery-screenof 30 mesh is used and the discharge maintained at 4 in. abovethe dies; under these conditions each battery of two headscrushes 10 tons per 24 hours. Fig. 5.
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PLAN SECTION THROUGH X-X NotesA Wilfley Table. Concentrates end (Plan.)B Amalgamated plate, slopes outward and to discharge endC Shovel shaped plate,movement of which unites particles of mercuryB Independent plate below discharge of 0E Mercury Trap Arrangement of Table, Plates and Mercury-Trap at the Mill, Candtillo, Chile. From the lip-plates the pulp passes through a mercury-trap4 ft. wide by 6 in. across, containing a bath of mercury 1 inchdeep. Across the bath is a center-board which causes the pulpsto dip once below the surface, thus serving principally as a dis-tributor from the front- and side-discharges of the mortars tothe plates, which are 8 ft. long by 4 ft. wide, set with 1.25 in.fall to the foot. Beyond the plates are traps similar to the firstone, followed by a Wilfley table, which has at the head- or con-centrates-end the arrangement of plates and traps shown in l ill: QOLO DM I I 0 \N> I CLLO, OHILB, 9. A. 7. 1 _. After dropping from the end of the table the

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