File:Transactions (1871) (14590081748).jpg

Identifier: transactionsmining27amer (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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he widely-felt need of such a machine,have been granted, but until a short time ago none of themhad received a practical demonstration. The advantages to begained, from an economical and metallurgical point of view,by the production of clean, uniformly-sized, sand-free pig-ironhave been ably and forcibly presented by a member of the In-stitute, Mr. Henry D. Hibbard, in his paper on this subject, readbefore the British Iron and Steel Institute in 1896. Since thispaper was published experiments have been in progress, result-ing in the evolution of the Uehling machine for casting, con-veying and automatically loading blast-furnace metal, which isnow in successful operation at the Lucy furnaces, Pittsburgh,and, on the strength of its performance there, has beenadopted to replace the system of sand-casting and pig-breakinghitherto used at the Duquesne furnaces. The Uehling machine, Fig. 29, consists of two endless chainsabout 90 feet long from center to center of the end sproeket- Fig. 16.
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Appras-)- Amcrkia EajJc Note Co,->.Y. Brown Conveying-Apparatus, Plan and Elevation. 34 THE HANDLING OF MATERIAL AT THE BLAST-FURNACE. wheels. To the links of these chains are bolted a series of ironmoulds or buckets, with edges overlapping one another, so as toform a continuous casting-platform, moving at a rate of about15 feet per minute. The machines are worked in pairs, two linesof moulds traveling side by side. The iron is run from aladle-car through a T-shaped trough into the slowly-advancingmoulds. By tilting the trough one way or the other the flowinto the two lines of moulds is regulated to a nicety. At theend of six minutes, when the filled moulds have reached theend of the conveyer, the pigs are sufficiently cooled to permittheir being dropped from the casting-machine upon a conveyer,which carries them through a cooling-tank tilled with water,and delivers them directly on the railroad-car ready for ship-ment. To promote the cooling of the pigs while in the mouldsthey are

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