The Metallurgy of Lead & Silver: LeadGriffin, 1899 - Lead |
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Page 4
... removed to a bin , where they remain until settlement is made , in case re - sampling should be demanded by the seller . From the remaining two quarters a new cone is built up in another spot a few feet away , and the same process is ...
... removed to a bin , where they remain until settlement is made , in case re - sampling should be demanded by the seller . From the remaining two quarters a new cone is built up in another spot a few feet away , and the same process is ...
Page 7
... removed , the sides again scraped down and the stirrer washed in the slag , after which the crucible is tapped a few times to settle the lead , and poured ; any small globules adhering to the pot being also turned out by a sharp tap or ...
... removed , the sides again scraped down and the stirrer washed in the slag , after which the crucible is tapped a few times to settle the lead , and poured ; any small globules adhering to the pot being also turned out by a sharp tap or ...
Page 8
... removed one by one with a pair of short tongs , washing each carefully in the slag to detach any adhering globules of lead . The crucible is then tapped a few times , and poured into a scorifier mould , or on to a cast - iron plate as ...
... removed one by one with a pair of short tongs , washing each carefully in the slag to detach any adhering globules of lead . The crucible is then tapped a few times , and poured into a scorifier mould , or on to a cast - iron plate as ...
Page 13
... removed from the muffle and its contents are poured into the mould , which is preferably conical in shape ; when cold the lead button is easily separated from the brittle slag , cleaned by hammering and brushing , and " cubed up " ready ...
... removed from the muffle and its contents are poured into the mould , which is preferably conical in shape ; when cold the lead button is easily separated from the brittle slag , cleaned by hammering and brushing , and " cubed up " ready ...
Page 17
... removed from the cupel when cold by sharp - nosed pliers , and squeezed and brushed to remove adhering bone ash , if large enough ; if too small , it is carefully picked up by fine forceps , placed on a blowpipe anvil and flattened by a ...
... removed from the cupel when cold by sharp - nosed pliers , and squeezed and brushed to remove adhering bone ash , if large enough ; if too small , it is carefully picked up by fine forceps , placed on a blowpipe anvil and flattened by a ...
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Common terms and phrases
alloy amount antimony arsenic assay average blast furnace bottom brick Broken Hill bullion carbon cast-iron cent charge CHARLES GRIFFIN coal coke concentrates consumption containing cooling copper cost crucible crust cupellation desilverisation doors dross dust Engineers EXETER STREET feet firebrick Flintshire flue flue-dust flux Freiberg fuel fume fusible fusion galena gases gold grey slag hearth Hofman inches iron jackets labour Lautenthal lead and silver lead sulphide Leadville lime liquation litharge matte melting metal Metallurgy Metallurgy of Lead method mixture molten oxide oxidised Parkes process pipe plates Port Pirie practice produced proportion pyrites quantity rabble reaction reduced residues reverberatory reverberatory furnace roasting sample Schnabel scorifier separate shown in Figs silicates silver contents sintering SiO2 skimmings slag smelting softening furnace speiss sulphate sulphide Table tapped temperature tons Trans treated tuyeres volatilisation volatilisation loss weight work-lead zinc
Popular passages
Page 85 - The arguments for and against " sintering " and " slagging " respectively have been already stated in this chapter, and need not be repeated here. Suffice it to say that the...