A Practical Treatise on Metallurgy: Adapted from the Last German Edition of Prof. Kerl's Metallurgy, Volúmenes1-2Longmans, Green, and Company, 1868 |
Dentro del libro
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Página 133
... openings for charg- ing the furnace . The tuyeres have a slight inclination , and the slope of the front wall is from 12 or 15 inches . At the Muldner smelting works , 6 double furnaces are connected by means of a channel which is built ...
... openings for charg- ing the furnace . The tuyeres have a slight inclination , and the slope of the front wall is from 12 or 15 inches . At the Muldner smelting works , 6 double furnaces are connected by means of a channel which is built ...
Página 138
... opening for charging the fuel , 16 inches high ; h , fire - bridge ; i , channel for cooling ; k , refractory coating , consisting of 3 parts quartz and 1 part clay , 12 inches high ; FIG . 54 . a n n m 12 Feet 138 LEAD .
... opening for charging the fuel , 16 inches high ; h , fire - bridge ; i , channel for cooling ; k , refractory coating , consisting of 3 parts quartz and 1 part clay , 12 inches high ; FIG . 54 . a n n m 12 Feet 138 LEAD .
Página 139
... openings ; s , tap opening ; t , opening for charging the furnace ; u , support for the tools , coated with a lubricating mixture of oil and graphite ; v , support for tools used for lifting the grate ; w , flue ; x , chimney , 66 feet ...
... openings ; s , tap opening ; t , opening for charging the furnace ; u , support for the tools , coated with a lubricating mixture of oil and graphite ; v , support for tools used for lifting the grate ; w , flue ; x , chimney , 66 feet ...
Página 145
... opening to the fire - bridge . The loss in this process amounts to 9 or 10 per cent ; taking into consideration per cent of virgin lead , which is extracted during roasting , the roasting mass contains about 4 per cent of sulphur , and ...
... opening to the fire - bridge . The loss in this process amounts to 9 or 10 per cent ; taking into consideration per cent of virgin lead , which is extracted during roasting , the roasting mass contains about 4 per cent of sulphur , and ...
Página 157
... opening to make room for a new charge which remains in the furnace for 36 hours ; each furnace holds 6 charges . The mass must not become liquid enough to produce metallic lead , as this would increase the loss of metal and allow the ...
... opening to make room for a new charge which remains in the furnace for 36 hours ; each furnace holds 6 charges . The mass must not become liquid enough to produce metallic lead , as this would increase the loss of metal and allow the ...
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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