| 摘要 |
<p>Method for automatically switching to an oversuction mode the gases emitted by the series containers for the production of aluminum by ignited electrolysis according to the Hall-Héroult process, each container being closed, at its periphery, by a plurality of removable bonnets arranged in substantially sealed relationship between each other and between each of them and their bearings to the periphery of the container, the gases being collected at each container by at least one pipe connected to a central suction system. The gas temperature is constantly measured in the pipe. The opening of at least one bonnet results in a sudden temperature decrease, thereby enabling to trigger an oversuction which will stop automatically when, all the bonnets being closed, the gas temperature will substantially have its initial value. The energy necessary for the suction system is thus substantially reduced.</p> |
