Treatment of molten light metals
First Claim
1. IN THE TREATMENT OF MOLTEN LIGHT METALS FOR THE SUBSTANTIAL REMOVAL THEREFROM OF GAS AND FINELY DIVIDED SOLIDS, THE METHOD COMPRISING PROVIDING A CONTAINER THROUGH WHICH THE MOLTEN LIGHT METAL IS PASSED, SAID CONTAINER HAVING A FILTER BED THEREIN COMPOSED OF REFRACTORY GRANULES 3 TO 14 MESH IN SIZE AND INERT TOWARD THE MOLTEN LIGHT METAL, COMPLETELY COVERING SAID BED WITH MOLTEN METAL, INTRODUCING METAL TO BE TREATED ABOVE THE BED AND PASSING IN DOWNWARDLY THERETHROUGH, AT THE SAME TIME PASSING AN INERT FLUXING GAS UPWARDLY THROUGH AT LEAST A PORTION OF THE BED AND IN COUNTER CURRENT RELATIONSHIP TO THE DESCENDING MOLTEN METAL FOR A DISTANCE OF AT LEAST TWO INCHES IN THE BED, SAID FLUXING GAS AS SPENT GAS AND THE GAS DERIVED FROM THE MOLTEN METAL BEING RELEASED FROM THE SURFACE OF MOLTEN METAL THAT HAS NOT PASSED THROUGH SAID BED.
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Accused Products
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Citations
1 Claim
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1. IN THE TREATMENT OF MOLTEN LIGHT METALS FOR THE SUBSTANTIAL REMOVAL THEREFROM OF GAS AND FINELY DIVIDED SOLIDS, THE METHOD COMPRISING PROVIDING A CONTAINER THROUGH WHICH THE MOLTEN LIGHT METAL IS PASSED, SAID CONTAINER HAVING A FILTER BED THEREIN COMPOSED OF REFRACTORY GRANULES 3 TO 14 MESH IN SIZE AND INERT TOWARD THE MOLTEN LIGHT METAL, COMPLETELY COVERING SAID BED WITH MOLTEN METAL, INTRODUCING METAL TO BE TREATED ABOVE THE BED AND PASSING IN DOWNWARDLY THERETHROUGH, AT THE SAME TIME PASSING AN INERT FLUXING GAS UPWARDLY THROUGH AT LEAST A PORTION OF THE BED AND IN COUNTER CURRENT RELATIONSHIP TO THE DESCENDING MOLTEN METAL FOR A DISTANCE OF AT LEAST TWO INCHES IN THE BED, SAID FLUXING GAS AS SPENT GAS AND THE GAS DERIVED FROM THE MOLTEN METAL BEING RELEASED FROM THE SURFACE OF MOLTEN METAL THAT HAS NOT PASSED THROUGH SAID BED.
Specification
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Current AssigneeHess, Paul D., Kenneth J. Brondyke, Noel Jarrett
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Original AssigneeHess, Paul D., Kenneth J. Brondyke, Noel Jarrett
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InventorsHess, Paul D., Brondyke, Kenneth J., NOEL JARRETT
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Application NumberUS03/775,627Time in Patent Office1,306 DaysField of SearchUS Class Current75/409CPC Class CodesC22B 21/066 Treatment of circulating al...
