The Metallurgy of Lead & Silver: LeadGriffin, 1899 - Lead |
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Page 1
... carried in a covered can ( after roughly crushing , if necessary ) to the assay office , where duplicate quan- tities , of say 2 lbs . each , are weighed out and dried in an iron or porcelain dish . The sampling proper is , except in ...
... carried in a covered can ( after roughly crushing , if necessary ) to the assay office , where duplicate quan- tities , of say 2 lbs . each , are weighed out and dried in an iron or porcelain dish . The sampling proper is , except in ...
Page 3
... carrying it out is a large sampling floor under cover , as level and closely laid * Trans . A.I.M. E. , vol . xiii . , p . 639 ; and Hofman , op . cit . , p . 55 . + Trans . A.I.M.E. , vol . xx . , p . 416 ; also Hofman , op . cit . , p ...
... carrying it out is a large sampling floor under cover , as level and closely laid * Trans . A.I.M. E. , vol . xiii . , p . 639 ; and Hofman , op . cit . , p . 55 . + Trans . A.I.M.E. , vol . xx . , p . 416 ; also Hofman , op . cit . , p ...
Page 18
... carried down with it all the AgCl and free gold in suspension , and wash it well with hot water , picking out the globules of sulphur with a forceps . Burn these in a porcelain crucible , add the residue to the precipitate , which dry ...
... carried down with it all the AgCl and free gold in suspension , and wash it well with hot water , picking out the globules of sulphur with a forceps . Burn these in a porcelain crucible , add the residue to the precipitate , which dry ...
Page 27
... carried away by the furnace gases , and part condensing to form the crystals and crusts of sublimed galena , which are of such common occurrence in the upper parts of lead furnaces . * Roscoe and Schorlemmer , 1892 , vol . ii . , pt . I ...
... carried away by the furnace gases , and part condensing to form the crystals and crusts of sublimed galena , which are of such common occurrence in the upper parts of lead furnaces . * Roscoe and Schorlemmer , 1892 , vol . ii . , pt . I ...
Page 33
... carried off by the dressing water . The poorest galena as regards silver contents is that from Bleiberg ( Carinthia ) , which contains only 1 dwt . per ton of ore ; the richest known is that from Schemnitz ( Hungary ) , a specimen of ...
... carried off by the dressing water . The poorest galena as regards silver contents is that from Bleiberg ( Carinthia ) , which contains only 1 dwt . per ton of ore ; the richest known is that from Schemnitz ( Hungary ) , a specimen of ...
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Common terms and phrases
20 per cent amount antimony arsenic assay average blast furnace bottom brick Broken Hill bullion carbon cast-iron charcoal charge CHARLES GRIFFIN coal coke concentrates consumption containing cooling copper cost crucible crust cupellation desilverisation dross dust employed Engineers EXETER STREET feet firebrick flue flue-dust Freiberg fuel fume fusible galena gases gold hearth heat Hofman inches Lautenthal lead and silver lime liquation litharge matte melting metallic Metallurgy Metallurgy of Lead method mixture molten ordinary oxide oxidised Parkes process pipe plates Port Pirie practice produced proportion pyrites quantity reaction reduced residue reverberatory reverberatory furnace rich roasting sample Schnabel separate shown in Figs siliceous sintering SiO2 skimmings slag smelting smelting zone softening furnace speiss sulphate sulphide sulphuric acid Table tapped temperature tons Trans treated tuyeres usually volatilisation Water Jacket weight work-lead zinc zinc sulphate
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