File:Transactions (1871) (14581680857).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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Text Appearing Before Image:
ormal output of eachfurnace, however, was 200 tons in 24 hours. Later, it was decided to modify the lines of furnace ~No. 1,so as to increase its capacity to 350 tons. The dimensionsafter remodeling were :—Diameter of throat, 15 ; of bosh, 21,and of crucible, 12 feet. The number of tuyeres was increasedto 12, which were uniformly distributed around the furnace,and a Sahlin patent spiral-cooled bosh-jacket was added. Theoperation of this furnace has proved satisfactory and shortlyfurnace ISTo. 2 will be put out of blast and remodeled in likemanner. The two blast-furnaces work with different kinds of ore.One uses the more phosphoric ores and produces high-gradefoundry-iron; while the other uses very pure ores (containingfrom 0.007 to 0.010 per cent, of phosphorus), and producesfirst-class hematite-iron. The bells, closing the hoppers at the furnace-tops, are workedelectrically by small series-wound motors controlled by tram-way-type controllers. The raw materials—coke, ore and lime-
Text Appearing After Image:
922 BLAST-FURNACE PLANT AT PORTOFERRAIO, ITALY,

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