The Metallurgy of Lead & Silver: LeadGriffin, 1899 - Lead |
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Page xiv
... Rich Alloys , 328 328 328 329 Retort Dross , 329 crusts , 319 Blue Powder , 329 1. Flach's Process , 319 Costs and Losses , 329 2. Corduries ' Process , 320 Comparison between Pattinson 24. Schnabel's Process , 321 and Parkes Processes ...
... Rich Alloys , 328 328 328 329 Retort Dross , 329 crusts , 319 Blue Powder , 329 1. Flach's Process , 319 Costs and Losses , 329 2. Corduries ' Process , 320 Comparison between Pattinson 24. Schnabel's Process , 321 and Parkes Processes ...
Page 1
... rich silver ores , always begun by the method of fractional selection . This consists in setting aside as the bulk sample every fifth , tenth , or , in the case of very poor ores , every twentieth shovelful or sackful as unloaded . This ...
... rich silver ores , always begun by the method of fractional selection . This consists in setting aside as the bulk sample every fifth , tenth , or , in the case of very poor ores , every twentieth shovelful or sackful as unloaded . This ...
Page 5
... rich ores ) , and is then again quartered or split - shovelled down to about 10 or 20 lbs . , which is taken to the " bucking room " for further * E. and M. J. , June 20 , 1891 . reduction . Sometimes this is done by hand , more ...
... rich ores ) , and is then again quartered or split - shovelled down to about 10 or 20 lbs . , which is taken to the " bucking room " for further * E. and M. J. , June 20 , 1891 . reduction . Sometimes this is done by hand , more ...
Page 6
... rich galenas little else is ever required . In the case of complex ores , however , it is necessary to deter- mine many other ingredients , not only as a guide in making up the furnace charges , but also as a basis for purchase , as ...
... rich galenas little else is ever required . In the case of complex ores , however , it is necessary to deter- mine many other ingredients , not only as a guide in making up the furnace charges , but also as a basis for purchase , as ...
Page 7
... rich , the actual loss averaging only 1 to 1 per cent . on the weight of ore taken . When , however , the gangue consists mainly of silica the results on poor ores ( 8 to 25 per cent . ) are from 3 to 34 per cent . lower than the truth ...
... rich , the actual loss averaging only 1 to 1 per cent . on the weight of ore taken . When , however , the gangue consists mainly of silica the results on poor ores ( 8 to 25 per cent . ) are from 3 to 34 per cent . lower than the truth ...
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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...