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Image from page 949 of "Transactions" (1871)

Image from page 949 of
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Identifier: transactionsmining63amer
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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u. ft.of gas per hour. We see that in these three factors the processes vary considerablyand the results of actual practice are relatively such as may belogically predicted from these variations. For example, from the verticalgas retort, tar is obtained in greater quantity, but thinner and of muchlower free carbon content, than from a byproduct coke oven or old-typehorizontal retort; much less naphthalene, anthracene, and off-take pipecarbon are formed in the verticals and a greater production of ammonia.The horizontals, however, commonly yield gas of higher candlepower.All of these results are largely attributable to the relationship shown byfactor D of Table 1, the greater contact of volatile products with super- 904 TESTING OP COALS FOR BYPRODUCT COKING AND GAS MANUFACTURE heating space in horizontal retort and coke oven, the former being nearlythree times that of the vertical and the coke oven nearly twice that ofthe vertical. The coke oven, on the other hand, as shown by A and C,

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VI INCLINEDGAS RETORT2000 Lbs.Coal I BEE HIVE OVEN6 Tons Coal II III IV V BY-PRODUCT HORIZONTAL VERTICAL OVEN GAS RETORTS GAS RETORT12 Tons Coal Old ^ew 100 Lbs.Coal (Stop End) (Through)Type Type 450 Lbs.Coal 1700 Lbs.Coal Fig. 1.—Relative size and shape of various ovens and retorts for carbonizing COAL. has a considerably lower coking velocity than the gas retorts and agreater volume of carbonizing mass per unit flow of gas so that, dueprincipally to these differences, it makes a stronger and better coke HORACE C. PORTER 905 Table 1.—Comparative Dimensions in Various Carbonizing Processes Beehive Byprod-Coke j uct CokeOven Oven Vertical GasRetort* Horizontal GasRetort OldType* NewType 0.23 0.85 4 6 0.65 1.63 1.10 1.0 Coal charge, tons 6.5 12.0 0.85 Carbonizing period, hours 48 | 17 11 Gas made per hour, thousand cubic feet. i 7.6 0.87 A—Coking velocity, inches per hour 0.50 0.53 0.68 Velocity of travel of plastic zone 0.82 1. 25 Heated wall area, square feet 795.0 97.1 B—Wall

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Date: 2014-07-30 11:59:22

bookid:transactionsmining63amer bookyear:1871 bookdecade:1870 bookcentury:1800 bookauthor:American_Institute_of_Mining__Metallurgical__and_Petroleum_Engineers booksubject:Mineral_industries bookpublisher:New_York__etc__ bookcontributor:Gerstein___University_of_Toronto booksponsor:University_of_Toronto bookleafnumber:949 bookcollection:gerstein bookcollection:toronto

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