A Practical Treatise on Metallurgy: Adapted from the Last German Edition of Prof. Kerl's Metallurgy, Volúmenes1-2Longmans, Green, and Company, 1868 |
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Página 19
... becomes more concentrated in the former portions of the extracted lead than in the latter . When the lead from the different periods of the reverberatory process is collected together , the average amount of silver in the whole mass may ...
... becomes more concentrated in the former portions of the extracted lead than in the latter . When the lead from the different periods of the reverberatory process is collected together , the average amount of silver in the whole mass may ...
Página 20
... becomes , and the more oxide , sulphide , and sulphate of lead will be decom- posed by the iron . In consequence of this the iron tools are sometimes worn away rapidly , causing considerable expense . Period 3 .- ( Treatment of the ...
... becomes , and the more oxide , sulphide , and sulphate of lead will be decom- posed by the iron . In consequence of this the iron tools are sometimes worn away rapidly , causing considerable expense . Period 3 .- ( Treatment of the ...
Página 21
... becomes reduced and vola- tilised , lead and silver going along with it . Burned lime , in form of powder , may be recommended an admixture for the residues , if they are richer in sulphide of lead than in oxides . It acts partly ...
... becomes reduced and vola- tilised , lead and silver going along with it . Burned lime , in form of powder , may be recommended an admixture for the residues , if they are richer in sulphide of lead than in oxides . It acts partly ...
Página 22
... becomes , without further preparation , a marketable product ( Carinthian lead ) ; if it contains suffi- cient silver to render its extraction profitable , it is either cupelled ( Poullaouen ) , or previously treated by Pattinson's ...
... becomes , without further preparation , a marketable product ( Carinthian lead ) ; if it contains suffi- cient silver to render its extraction profitable , it is either cupelled ( Poullaouen ) , or previously treated by Pattinson's ...
Página 23
... becomes reduced from the sulphuretted to the metallic state when in contact with hot air . The formation of lead fume is frequently so considerable that it is advisable and economical to collect it in proper condensation flues . It is ...
... becomes reduced from the sulphuretted to the metallic state when in contact with hot air . The formation of lead fume is frequently so considerable that it is advisable and economical to collect it in proper condensation flues . It is ...
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Términos y frases comunes
24 hours Altenau amalgam amount of silver antimony argentiferous arsenic baryta bismuth black copper blast calcined cent of copper cent of lead cent of silver charcoal charge chiefly clay coal cobalt coke condensation copper matt crucible cubic feet cupelling cupola furnaces cwts decomposed desilverised dross extraction flue fluxes formation formed Freiberg fuel furnace ends fused galena gold hearth heated impure inches iron pyrites Lautenthal lead containing lead matt lime liquation litharge loss of lead loss of metal loss of silver mercury metre mixed mixture muffles nickel oxide oxide of lead oxidised Pattinson's process precipitated production quantity quartz raw lead raw matt reduced refined residues resulting reverberatory furnaces rich lead roasting mass roasting process schlich silica silver per cwt slags smelting process sodium sodium amalgam spar speiss sulphate of lead sulphide sulphuric acid sump temperature treated tuyere u. h. Ztg Upper Hartz volatilisation whilst yield zinc blende