The Metallurgy of Lead & Silver: LeadGriffin, 1899 - Lead |
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Page 6
... metallic threads or scales , which frequently happens in the case of ores containing native silver or " chlorides , " such portion is weighed and assayed separately , the weight of sample passing the sieve being also determined . The ...
... metallic threads or scales , which frequently happens in the case of ores containing native silver or " chlorides , " such portion is weighed and assayed separately , the weight of sample passing the sieve being also determined . The ...
Page 11
... metallic condition ; the difference between its weight and that of the bead obtained by cupellation being the weight of silver . In the case of rich galenas , of which 400 grains or more have been taken for lead assay by the iron ...
... metallic condition ; the difference between its weight and that of the bead obtained by cupellation being the weight of silver . In the case of rich galenas , of which 400 grains or more have been taken for lead assay by the iron ...
Page 26
... metallic oxides . With potash and soda it apparently acts as an acid , with stannic oxide and arsenic and antimonic acids , as a base , while in other cases it seems to act simply as a solvent . The following table § shows the ...
... metallic oxides . With potash and soda it apparently acts as an acid , with stannic oxide and arsenic and antimonic acids , as a base , while in other cases it seems to act simply as a solvent . The following table § shows the ...
Page 27
... metallic state by all reducing agents ( by CO at only 100 ° C. , by H at 310 ° C . ) , * and , therefore , forms a valuable oxidising agent . When mixed with S , Te , As , Sb , Bi , Cu , Zn , or Fe , these substances become wholly or ...
... metallic state by all reducing agents ( by CO at only 100 ° C. , by H at 310 ° C . ) , * and , therefore , forms a valuable oxidising agent . When mixed with S , Te , As , Sb , Bi , Cu , Zn , or Fe , these substances become wholly or ...
Page 28
... metallic lead and leave a residue of crystalline sulphide ; further , that lead and its sulphide can be melted together in all proportions , the properties of the mixtures being intermediate between those of their components , and ...
... metallic lead and leave a residue of crystalline sulphide ; further , that lead and its sulphide can be melted together in all proportions , the properties of the mixtures being intermediate between those of their components , and ...
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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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