| 摘要 |
<p>An open-chamber furnace for the firing of carbonaceous blocks to be used particularly in the electrolytic production of aluminium by the Hall- Héroult process, is formed by a series of chambers delimited by lateral walls (2) which have openings (6) at the top inter-connecting the chambers and which may be sealed by insulation dampers (10). Each chamber is divided into compartments (3) by hollow heating partitions (4) in which the combustion air and gases circulate, and each partition has at the top openings (13) which are termed "vents". The whole furnace, when operational has in the direction of progression of the fire, a cooling zone, an air preheating zone and a full fire zone, characterised in that at least one cooling air blow-pipe (12A, 12B) located in the cooling zone, is provided over the vents (13) of the partitions (4). <IMAGE></p> |
