The Metallurgy of Lead & Silver: LeadGriffin, 1899 - Lead |
From inside the book
Results 1-5 of 62
Page 6
... mixture of * The student may consult Phillips ' Elements of Metallurgy , 1891 , pp . 626 , et seq .; Percy , Metallurgy of Lead , pp . 104-119 ; Balling , Probirkunde , Brunswick , 1879 , and Gautier's translation , Manuel de l'art de l ...
... mixture of * The student may consult Phillips ' Elements of Metallurgy , 1891 , pp . 626 , et seq .; Percy , Metallurgy of Lead , pp . 104-119 ; Balling , Probirkunde , Brunswick , 1879 , and Gautier's translation , Manuel de l'art de l ...
Page 7
... mixture shot in from a copper scoop , and the crucible replaced in a hot fire without loss of time , a cover " of borax being added . As soon as the mixture is completely melted ( which should take about five minutes ) , the contents of ...
... mixture shot in from a copper scoop , and the crucible replaced in a hot fire without loss of time , a cover " of borax being added . As soon as the mixture is completely melted ( which should take about five minutes ) , the contents of ...
Page 14
... mixtures are in use , but among the best are those given in the following table . Careful examination of the sample with a lens and by washing a little of it in a small porcelain dish or saucer will usually give sufficient information ...
... mixtures are in use , but among the best are those given in the following table . Careful examination of the sample with a lens and by washing a little of it in a small porcelain dish or saucer will usually give sufficient information ...
Page 15
... mixture 5 ; a large pot must be used or the mixture is liable to boil over , but when a muffle is handy ( as is usually the case ) the author prefers to place the weighed sample in a large roasting dish just inside the muffle door and ...
... mixture 5 ; a large pot must be used or the mixture is liable to boil over , but when a muffle is handy ( as is usually the case ) the author prefers to place the weighed sample in a large roasting dish just inside the muffle door and ...
Page 18
... mixture into a small crucible with a borax cover and an iron nail to keep out copper from the button , and fuse it in the muffle like a lead assay . If the button is over 10 grammes in weight , or if hard from the presence of copper ...
... mixture into a small crucible with a borax cover and an iron nail to keep out copper from the button , and fuse it in the muffle like a lead assay . If the button is over 10 grammes in weight , or if hard from the presence of copper ...
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...