The Metallurgy of Lead & Silver: LeadGriffin, 1899 - Lead |
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Page 6
... give most satisfactory results need be described here . 1. Method for Pure Galenas containing upwards of 70 per cent . Lead . The best method is the iron crucible assay , commonly used in England , and in Belgium and Silesia ; it is ...
... give most satisfactory results need be described here . 1. Method for Pure Galenas containing upwards of 70 per cent . Lead . The best method is the iron crucible assay , commonly used in England , and in Belgium and Silesia ; it is ...
Page 8
... gives higher results , though it undoubtedly prevents the elimination of volatile metals . After well tapping down , from 1 to 4 " tenpenny " nails are added , points downward , according to Iles , for they are then less likely to ...
... gives higher results , though it undoubtedly prevents the elimination of volatile metals . After well tapping down , from 1 to 4 " tenpenny " nails are added , points downward , according to Iles , for they are then less likely to ...
Page 9
... gives a white precipitate with lead acetate until the whole of the lead present is thrown down , any excess of molybdate being shown at once by the yellow + * E. and M. J. , June 18 , 1892 , and J. Am . Chem . Soc . , vol . xv . , p ...
... gives a white precipitate with lead acetate until the whole of the lead present is thrown down , any excess of molybdate being shown at once by the yellow + * E. and M. J. , June 18 , 1892 , and J. Am . Chem . Soc . , vol . xv . , p ...
Page 10
Henry Francis Collins. 2 4 colour which it gives with a fresh solution of tannin . The in- dicator is made by dissolving 1 gramme of tannin in 300 c.c. of water , and is used in the form of drops on a porcelain plate . The standard ...
Henry Francis Collins. 2 4 colour which it gives with a fresh solution of tannin . The in- dicator is made by dissolving 1 gramme of tannin in 300 c.c. of water , and is used in the form of drops on a porcelain plate . The standard ...
Page 11
... give more uniform and more reliable results . The scorification assay is undoubtedly to be preferred Croasdale , E. M.J. , Feb. 11 , 1893 . + Beebe , E.M.J. , July 17 , 1894 ; Low , J. Am . Chem . Soc . , vol . xv . , p . 548 . for lead ...
... give more uniform and more reliable results . The scorification assay is undoubtedly to be preferred Croasdale , E. M.J. , Feb. 11 , 1893 . + Beebe , E.M.J. , July 17 , 1894 ; Low , J. Am . Chem . Soc . , vol . xv . , p . 548 . for lead ...
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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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