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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 Excerpt: ...any further. Bridgman-s Copper Refining Furnace.--Messrs. Fraser & Chalmers show in their catalogue a well designed refining furnace, designed by Mr. H. L. Bridgman. It is illustrated here in plan and section in Figs. 25, 26. CHAPTER XI. THE ELECTROLYTICAL TREATMENT OF COPPER ORES. In the practical application of electro-metallurgy it has not hitherto been found profitable to treat copper ores direct by electrolysis, or even coarse metal or ordinary matte; but as Messrs. Siemens and Halske and C. Hoepener claim that they can accomplish this with substantial financial success, the specifications of their methods will be given in the present chapter. Siemens and Halske-s Electrolytical Process.--Copper has been produced electrolytically up to the present, by employing as anodes plates of impure copper or matte. On the anode, copper and iron are dissolved, and copper is precipitated on the cathode. The solution becomes impoverished, and has to be replaced by fresh solutions, which are prepared from ores with difficulty and with great expense. The preparation of the anodes from matte requires a previous smelting operation of the roasted sulphide copper ores; the casting of the anode plates is difficult and uncertain, and the electrolytic process is interrupted through the breaking to pieces of the anode plates. The process now to be described consists in employing a solution in connection with insoluble anodes, and to separate by means of a non-metallic diaphragm the anodes from the cathodes. The solution to be electrolysed consists of iron vitriol and copper vitriol, to which some sulphuric acid is added, which assists the conductivity of the solution. The solution is introduced in the bottom of the cells, and rises gradually, whereby a portion of the copp...
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