Légende
This illustration dates to the 1870s and shows a cup and cone.The most active ingredient in the reduction of the metal is the carbonic oxide gas produced in the furnace by the incomplete combustion of the carbon of the coal. If the gases are withdrawn from the furnace without checking the upward curent, the processes could not suffer in any way. One effective way doing this is shown here: a section through the upper part of the smelting furnce, with the ""cup and cone"" arrangement. The mouth of the furnace is covered by a shallow iron cone (a) open at the bottom, into which fits another cone (b), attached to a chain (c), sustained by an arm of the lever (d) which is firmly held in the required position by the chain (e) and is also provided with a counterpoise (f). In this position the muth of the furnace is closed and the gases find an exit by the opening (g), seen behind the cones, and leading into a passage through which the gases are conveyed to the place where they are required to be burnt.
Crédit
Photo12/Universal Images Group/Ivy Close Images
Notre référence
UMG25A05_332
Licence
Droits gérés
Format disponible
51,8Mo (1,3Mo) / 42,7cm x 30,4cm / 5040 x 3595 (300dpi)