File:Transactions (1871) (14581312209).jpg

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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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. and operated with a speed of 225 bucketsper minute. This belt elevates the material to the top of thebuilding. The coal that passes over the screen B falls upon a travel-ing belt F, 4 ft. 6 in. wide and 26 ft. long, having a speed of33 ft. per minute; and from this belt any large pieces of slateor other impurities, machine-picks, car-couplings, sprags, etc.,are removed by men stationed on the sides and thrown into arock-elevator G. This traveling belt is operated by a clutchgear H, which in case of a very large quantity of impuritiesappearing is thrown out, the belt stopped and all of the im-purities removed before the coal drops into the rollers 7, whichreduce the coal to a size not exceeeding a 4-in. cube. It wasfound necessary to reduce to a 4-in. size in order to prevent theconcealment of a sulphur-ball in a lump of coal. The rollersare of the removable-tooth style, 36 in. in diameter and 48 in.wide, and revolve at 75 revolutions per minute. :;» A 151 I I MINOl B-CO IL BREAKER.
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From the rollers the coal is elevated by a continuous elevatorJ, having buckets 12 by 30 in., and operated at a speed of 65buckets per minute. Each bucket has a capacity of 110 lb. ol \ 1.1 II MIN01 S-( (J \l. UK! \M IK. coal when level-full, which is equivalent to ^,m tons i»<t hour; the capacity of the fine-coal elevator E ia (.,(; tons per honr, ing ;i combined elevating-capacity of 290 tona per hour, 0T9

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Author American Institute of Mining, Metallurgical, and Petroleum Engineers
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28 July 2014



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