The Metallurgy of Lead & Silver: LeadGriffin, 1899 - Lead |
From inside the book
Results 1-5 of 76
Page 3
... Average between 20 and 50 ozs . Cocoanut . Orange . Walnut . Richest lump , 3000 ozs . Average between 50 and 150 ozs . Fist . Egg . Filbert . Wheat . Richest lump , 10,000 ozs . Average , say , 500 ozs . Small orange . Walnut . Filbert ...
... Average between 20 and 50 ozs . Cocoanut . Orange . Walnut . Richest lump , 3000 ozs . Average between 50 and 150 ozs . Fist . Egg . Filbert . Wheat . Richest lump , 10,000 ozs . Average , say , 500 ozs . Small orange . Walnut . Filbert ...
Page 9
... average volatilisation loss on ores of this grade to be 7.20 per cent . , which is offset by impurities in the buttons amounting to 3.75 per cent . of their weight ( gold and silver 0.42 per cent . , Sb , Cu , Fe , & c . , 3.33 per cent ...
... average volatilisation loss on ores of this grade to be 7.20 per cent . , which is offset by impurities in the buttons amounting to 3.75 per cent . of their weight ( gold and silver 0.42 per cent . , Sb , Cu , Fe , & c . , 3.33 per cent ...
Page 13
... average loss by cupellation alone was 1.99 per cent . , by combined scorification and cupellation 2:54 per cent . These results are confirmed by those of Miller and Fulton ( S. M. Q. , vol . xvii . , p . 163 ) . According to Percy ( Met ...
... average loss by cupellation alone was 1.99 per cent . , by combined scorification and cupellation 2:54 per cent . These results are confirmed by those of Miller and Fulton ( S. M. Q. , vol . xvii . , p . 163 ) . According to Percy ( Met ...
Page 33
... average 94 ozs . silver per ton for 66 per cent . of lead , while the dressed ore carries only 76 ozs . silver for 70 per cent . lead , a clear loss of 25 per cent . of the silver in the fine slimes carried off by the dressing water ...
... average 94 ozs . silver per ton for 66 per cent . of lead , while the dressed ore carries only 76 ozs . silver for 70 per cent . lead , a clear loss of 25 per cent . of the silver in the fine slimes carried off by the dressing water ...
Page 55
... average 6 to 7 ozs . silver per ton ; the remainder is all found in the residues ( amounting to 30 to 35 per cent . of the weight of the charge and containing 40 to 55 per cent . metal ) , except about 4.45 per cent . Of this , most is ...
... average 6 to 7 ozs . silver per ton ; the remainder is all found in the residues ( amounting to 30 to 35 per cent . of the weight of the charge and containing 40 to 55 per cent . metal ) , except about 4.45 per cent . Of this , most is ...
Other editions - View all
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...