摘要 |
<p>A device is described for injecting gas into molten metal, e.g. molten aluminum, in a furnace chamber. It comprises: (a) a stirring apparatus having a reservoir chamber separate from the furnace chamber, a connector portion with an orifice connecting the interior of the furnace and the reservoir for the passage of the molten metal between them through the connector portion, vacuum/pressure generating means connected to the reservoir chamber interior for alternatively and successively producing therein a vacuum for drawing molten metal into its interior from the furnace chamber and a positive pressure for expelling the molten metal therefrom into the furnace chamber through the orifice in the form of a high velocity stirring jet, and (b) gas injector means adapted to inject gas into the high velocity stirring jet such that the gas is broken down into a large number of small bubbles which are circulated throughout the furnace chamber with the stirring jet.</p> |
申请人 |
ALCAN INTERNATIONAL LTD., MONTREAL, QUEBEC, CA |
发明人 |
TREMBLAY, FRANCOIS, ST-FULGENCE, QUEBEC G0V 1S0, CA;DUBE, GHYSLAIN, CHICOUTIMI, QUEBEC G7H 7M3, CA |