Process and apparatus for degassing of fluid metals

Claim 1

AN APPARATUS FOR DEGASSING MOLTEN METAL COMPRISING A RECEPTACLE HAVING A BOTTOM WALL AND ADAPTED TO CONTAIN A BATH OF MOLTEN METAL HAVING AN UPPER LEVEL; AN ELONGGATED HOUSING DEFINING A CHAMBER WHICH IS DISPOSED ABOVE SAID RECEPTACLE, SAID HOUSING HAVING A PAIR OF OPPOSITE ENDS; A PAIR OF PIPES COMMUNICATING AT THE UPPER ENDS THEREOF WITH SAID CHAMBER RESPECTIVELY AT SAID OPPOSITE ENDS OF SAID HOUSING AND EXTENDING DOWNWARDLY FROM SAID CHAMBER SO AS TO DIP INTO MOLTEN METAL IN SAID RECEPTACLE, SAID PIPES HAVING LOWER ENDS SPACED TRANSVERSELY AND VERTICALLY FROM EACH OTHER TO COMMUNICATE WITH THE BATH RESPECTIVELY ADJACENT SAID UPPER LEVEL THEREOF AND ADJACENT SAID BOTTOM WALL OF SAID RECEPTACLE; SUCTION PRODUCING MEANS CONNECTED WITH SAIDHOUSING THE REDUCE THE PRESSURE IN SAID CHAMBER TO CAUSE MOLTEN METAL TO RISE FROM SAID RECEPTACLE INTO SAID CHAMBER; AND AN ELECTROMAGNETIC ARRANGEMENT FOR PRODUCING A LOW FREQUENCY ROTATING MAGNETIC FIELD EFFECTIVE TO CAUSE MOLTEN METAL TO FLOW IN AN ENDLESS PATH FROM SAID RECEPTACLE THROUGH ONE OF SAID PIPE, THROUGH SAID CHAMBER, THROUGH THE OTHER PIPE, AND BACK TO SAID RECEPTACLE WHEREBY THE METAL IS DEGASSED BY FLOWING THROUGH SAID CHAMBER, SAID ARRANGEMENT COMPRISING A SOURCE OF POLYPHASE ALTERNATING ELECTRIC ENERGY AND A PLURALITY OF SEPARATE ELECTROMAGNETIC MEANS ARRANGED ADJACENT TO SAID PATH AND SPACED FROM EACH OTHER ALONG PORTIONS OF SAID PATH AND ELECTRICALLY CONNECTED TO THE SOURCE OF ALTERNATING CURRENT TO PRODUCE A ROTATING FIELD MOVING IN DIRECTION OF SAID PATH.

Claim 2

AN APPARATUS FOR DEGASSING MOLTEN METAL COMPRISING A RECEPTACLE HAVING A BOTTOM WALL AND ADAPTED TO CONTAIN A BATH OF MOLTEN METAL HAVING AN UPPER LEVEL; AN ELONGGATED HOUSING DEFINING A CHAMBER WHICH IS DISPOSED ABOVE SAID RECEPTACLE, SAID HOUSING HAVING A PAIR OF OPPOSITE ENDS; A PAIR OF PIPES COMMUNICATING AT THE UPPER ENDS THEREOF WITH SAID CHAMBER RESPECTIVELY AT SAID OPPOSITE ENDS OF SAID HOUSING AND EXTENDING DOWNWARDLY FROM SAID CHAMBER SO AS TO DIP INTO MOLTEN METAL IN SAID RECEPTACLE, SAID PIPES HAVING LOWER ENDS SPACED TRANSVERSELY AND VERTICALLY FROM EACH OTHER TO COMMUNICATE WITH THE BATH RESPECTIVELY ADJACENT SAID UPPER LEVEL THEREOF AND ADJACENT SAID BOTTOM WALL OF SAID RECEPTACLE; SUCTION PRODUCING MEANS CONNECTED WITH SAIDHOUSING THE REDUCE THE PRESSURE IN SAID CHAMBER TO CAUSE MOLTEN METAL TO RISE FROM SAID RECEPTACLE INTO SAID CHAMBER; AND AN ELECTROMAGNETIC ARRANGEMENT FOR PRODUCING A LOW FREQUENCY ROTATING MAGNETIC FIELD EFFECTIVE TO CAUSE MOLTEN METAL TO FLOW IN AN ENDLESS PATH FROM SAID RECEPTACLE THROUGH ONE OF SAID PIPE, THROUGH SAID CHAMBER, THROUGH THE OTHER PIPE, AND BACK TO SAID RECEPTACLE WHEREBY THE METAL IS DEGASSED BY FLOWING THROUGH SAID CHAMBER, SAID ARRANGEMENT COMPRISING A SOURCE OF POLYPHASE ALTERNATING ELECTRIC ENERGY AND A PLURALITY OF SEPARATE ELECTROMAGNETIC MEANS ARRANGED ADJACENT TO SAID PATH AND SPACED FROM EACH OTHER ALONG PORTIONS OF SAID PATH AND ELECTRICALLY CONNECTED TO THE SOURCE OF ALTERNATING CURRENT TO PRODUCE A ROTATING FIELD MOVING IN DIRECTION OF SAID PATH.