The Metallurgy of Lead & Silver: LeadGriffin, 1899 - Lead |
From inside the book
Results 1-5 of 65
Page 7
... 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 two of the crucible held upside down in the tongs . When cool , the button of lead is separated from the ...
... 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 two of the crucible held upside down in the tongs . When cool , the button of lead is separated from the ...
Page 8
... tapping . According to Iles , a cover of borax is only requisite in the case of slags and basic ores , but it is ... tapped a few times , and poured into a scorifier mould , or on to a cast - iron plate as recommended by Iles . In ...
... tapping . According to Iles , a cover of borax is only requisite in the case of slags and basic ores , but it is ... tapped a few times , and poured into a scorifier mould , or on to a cast - iron plate as recommended by Iles . In ...
Page 16
... tapping , and pouring . The slag , if glassy and homogeneous both in texture and colour , may be thrown away ; otherwise it must be powdered , mixed with a little more litharge and lead flux , and remelted . In the case of all ores and ...
... tapping , and pouring . The slag , if glassy and homogeneous both in texture and colour , may be thrown away ; otherwise it must be powdered , mixed with a little more litharge and lead flux , and remelted . In the case of all ores and ...
Page 18
... tapping the tube a few times , it is allowed to stand for a minute or two . When no more particles can be dis- cerned settling through the water , the tube is removed and the water poured off , the last drops being drawn up by a ...
... tapping the tube a few times , it is allowed to stand for a minute or two . When no more particles can be dis- cerned settling through the water , the tube is removed and the water poured off , the last drops being drawn up by a ...
Page 47
... rolls to about an 8 - mesh ; after which it is Fig . 9. - Smelting Furnace , Coueron ; Transverse Section through Tapping Hole . charged into the furnace , still at a red heat. LEAD SMELTING IN REVERBERATORIES . 47 Mode of Working,
... rolls to about an 8 - mesh ; after which it is Fig . 9. - Smelting Furnace , Coueron ; Transverse Section through Tapping Hole . charged into the furnace , still at a red heat. LEAD SMELTING IN REVERBERATORIES . 47 Mode of Working,
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...