File:Canadian mining journal January-June 1905 (1905) (14759224926).jpg

Identifier: canminingjjanjun1905donm (find matches)
Title: Canadian mining journal January-June 1905
Year: 1905 (1900s)
Authors:
Subjects: Mines and mineral resources
Publisher: (Don Mills, Ont., Southam Business Communications)
Contributing Library: Fisher - University of Toronto
Digitizing Sponsor: University of Toronto

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ce are too restricted to pass thequantity of air of which the temperature conditions are cap-able with a free opening. With a certain amount of leak thetemperature conditions are still sufficient to carry more airthan can pass through the lamp, and the excess is taken in atthe leaks. A point is finally reached, however, where thetemperature in the chimney is too low to carry the quantity ofgas previously passed, and beyond this point the flow de-creases. The results with all the holes in the flue closed show thateven then there was a slight leak, amounting (when correctedfor temperature) to approximately four per cent. The temperatures given above were observed at about twoinches from the top of the iron flue. At the bottom the tem-peratures were 10 to 20 degrees less. (At the time that Mr. McDougalls paper was read beforethe Mining Section of the Can. Society of Civil Engineersthere was published in The Mining World an excellent de-scription of the new Washoe Reduction Works, at Ana-
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The Washoe Reduction Works, Anaconda, Montana, the largest of its kind in the world. THE CANADIAN MINING REVIEW. 33 conda. By courtesy of that paper we reproduce one or twophotographs of the works, and an abstract of its article.) The Washoe Reduction Works, Anaconda, Mont. This plant, which is the largest of its kind in the world, liessome 25 miles north-west from Butte in the Warm Springsvalley. The works include a sampling mill, concentrators. 900 tons daily, giving a total tonnage capacity of over 7,000tons when all sections are in operation. After crushing theore is screened to four sizes, viz.: diameters of 22mm, 7mm,5mm, and 2>^mm. The coarser sizes go to Harz jigs, the finerto Evans jigs, and the undersize is fed to hydraulic classifierswhich return their classification to other Evans jigs. The middlings from all jigs is re-sized or re-ground as isnecessary, ?nd re-fed; the process closely resembhng that of

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