Metal-work; a handbook for teachers and students (1914)
Adam, Hugh M. [from old catalog], Evans, James Humphrey, [from old catalog] joint author · New York, Longmans, Green and co.; London, E. Arnold · leaf 65
lled ore-furnace slag/After skimming offthe slag, the mattof coarse metalis run into waterand thereby granu-lated. The roastedore, it will beremembered, con-sisted of sulphideof iron and copperand oxide of ironand copper. Whenthese are melted,the affinity ofcopper for sulphuris so great that allthe… … THE ALLOY METALS 49 cess lasts about twenty-four hours, during whichtime a large proportionof the sulphides are con-verted into oxides, thechanges being similar tothose of the first roast-ing. 4. A charge of roastedcoarse metal is againmelted, together with asmall proportion ofcopper ore known tobe…
Metal-work
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