The hydrometallurgy of copper . he lead pipe of the tank by a cast-iron S-shaped elbow,Y, which allows the introduction of the compressed air pipe E for remov-ing any accumulation of ashes in the lead pipes of the tank. An American underfed stoker is used for the slack coal fuel and affordspractically perfect combustion, which is of great importance, as,other-wise the lead pipes would soon become coated with soot and lose muchof their efficiency to transmit the heat to the solution. The opposite ends of the lead pipes in the tank are connected withthe brick suction chamber 0, which in turn is
The hydrometallurgy of copper . he lead pipe of the tank by a cast-iron S-shaped elbow,Y, which allows the introduction of the compressed air pipe E for remov-ing any accumulation of ashes in the lead pipes of the tank. An American underfed stoker is used for the slack coal fuel and affordspractically perfect combustion, which is of great importance, as,other-wise the lead pipes would soon become coated with soot and lose muchof their efficiency to transmit the heat to the solution. The opposite ends of the lead pipes in the tank are connected withthe brick suction chamber 0, which in turn is connected by a galvanizediron pipe, R, with a suction fan, P, the gases being discharged into anunderground flue, 8. This flue serveb in common to collect the wastegases from 11 evaporators, and terminates outside the building in abrick chimney 40 ft. in height. The top pan is closed with a wooden cover, and wooden joists, G,are placed across the pan about 5 ft. apart, having cleats fastened to the 444 HYDROMETALLURGY OF COPPER. T3 dd d-od-(^ So d o IS d Ph t3d COPPER SULPHATE; BLUE STONE 445 lower side, as shown in Fig. 82. The spaces between the joists arecovered with boards resting on the cleats and pushed together closely,but not nailed, so that the whole or part of the cover can be easilyremoved. About 14 ft. from the front end of the tank is a pipe; connected with the main suction pipe, M, which crosses allof the evaporators to remove the water vapors. The main suction pipe,M, as well as the branch pipes, L, are made of wooden staves kept tightby hoops. M is connected with a large suction fan having the housingand wings of sheet copper and the shaft and arms of brass. This fanrapidly removes the vapor from each evaporating tank, and by its usethe building, even in cold winter weather, and notwithstanding that11 such evaporators are in operation, is entirely free from steam. Awooden stack outside the building serves for the dicharge of the fan, andthe exhaust
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Keywords: ., bookcentury1900, bookdecade1910, bookidcu3192400467, bookyear1912
