Français : Les trois convertisseurs Manhès-David de la Canadian Copper Co. Ils sont bascules hydrauliquement, ont 12 tuyères et une capacité interne de 1,5 tonnes de matte quand leur revêtement interne est neuf, 3 tonnes quand il est usé. English: The three Manhès-David converters of the Canadian Copper Co. They are powered by hydraulic, have 12 tuyeres and an internal capacity of 1.5 tons of matte with new lining, and 3 with old. Identifier: transactions05cana (find matches) Title: Transactions Year: 1895 (1890s) Authors: Canadian Institute of Mining and Metallurgy Subjects: Mineral industries Mines and mineral resources Publisher: Montreal (etc.) Contributing Library: Gerstein - University of Toronto Digitizing Sponsor: University of Toronto View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: ring, mediums a. i^. inch ring, and coarse a 4 inch ring.The coarse fall on bumping tables from which the ore and gangue ispartially separated by hand-picking. The ore may now either besmelted green, that is, without roasting, or it goes to the roast heaps,where it burns for from two to six months, thus oxidizing the sulphur,which is reduced in this way from about 24 per cent, or thereaboutsto 2^ to 8 per cent. An average sample of the roast ore gave : Copper 3.25 per cent. Nickel 2.16 Sulphur 8.32 Iron 25.61 And the rest gangue. Each heap contains from one thousand to four thousand tons ofore, the average being about two thousand tons, and they burn fromtwo to six months, the time depending on their size. The place selectedfor the piles is first covered with fine ore distributed evenly over theclay soil, the ground around being well drained to prevent as far aspossible the leaching out of the nickel and copper sulphates, then a ( i The Stilphide Ore Bodies of the Sudbury Region. 545 Text Appearing After Image: 35 546 The Canadian Mining Institute. foundation of cordwood, stamps, etc., through which are arrangedcanals filled with kindling wood communicating to chimneys for thesupply of draught. Then the interstices are filled up with small woodand chips, over which is laid the coarsest class of ore, then the med-iums, next a layer of rotten wood or chips, then a layer of regularraggings and over all a layer of fines and flue dust. When sufficientiof the sulphur is oxidized they are blasted up and the ore is sent to thesmelter. There are two smelters now at Copper Cliff with thirteen furnacesin all. The furnaces are water-jacketed and belong to the Herreshofftype, each having a capacity of a hundred and twenty-five tons pertwenty-four hours. They are each supplied with a circular well,mounted on wheels which rest on a track so that the well may beeasily pulled away in case of a freeze up or when the furnace is to betapped out. The well serves as a setthng chamber in which the slagand matte se Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.