Filtration apparatus

• US 4,640,497 A
• Filed: 10/25/1985
• Issued: 02/03/1987
• Est. Priority Date: 10/25/1985
• Status: Expired due to Fees

• Current Assignee: Swiss Aluminium Limited Ch-3965 Chippis Switzerland
• Original Assignee: Swiss Aluminium, Ltd.
• Inventors: Heamon, Mark L.
• Primary Examiner(s): Andrews, Melvyn J.
• Application Number:
  US06/791,604
• Time in Patent Office: 466 Days
• Field of Search: 266/227, 75/93 R, 210/510.1, 210/773
• US Class Current: 266/227
• CPC Class Codes: C22B 21/066 Treatment of circulating aluminium, e.g. by filtration C22B21/068 takes precedence
• CPC Class Codes: C22B 9/023 By filtering filtration of aluminium C22B21/066
• CPC Class Codes: Y02P 10/20 Recycling

Abstract

Improved filtration apparatus including a filter chamber having a metal inlet and a metal outlet defining a molten metal flow path therebetween and a filtration assembly engageable therewith disposed between the inlet and the outlet.

Claims

1. An improved molten metal filtration apparatus comprising a filter chamber having an internal surface for contact with molten metal, an external surface out of contact with molten metal, a molten metal inlet and a molten metal outlet defining a molten metal flow path therebetween, a removable filtration assembly engageable with said filter chamber and disposed between said inlet and outlet including a solid, plate-like member resistant to said molten metal completely blocking said flow path, a porous filter member seated in said solid member permitting flow of molten metal therethrough so that molten metal flowing through the filter chamber will flow through the porous filter member and means on said external surface for engaging and disengaging said filtration assembly from the filter chamber.

2. An apparatus according to claim 1 wherein said filtration assembly is substantially vertically disposed.

3. An apparatus according to claim 1 wherein said porous filter member is a ceramic foam filter.

4. An appartus according to claim 1 wherein said porous filter member is round with a bevelled edge to tightly seat in said solid member.

5. An apparatus according to claim 4 including a peripheral gasket circumscribing said porous filter member.

6. An apparatus according to claim 1 including a peripheral gasket circumscribing said solid member disposed between said filtration assembly and filter chamber.

7. An apparatus according to claim 1 including a second solid, plate-like baffle member disposed between said inlet and said porous filter member partially blocking said flow path.

8. An appartus according to claim 1 including a second filtration assembly disposed downstream of said filtration assembly and upstream of said outlet so as to provide two of said porous filter members in series.

9. An apparatus according to claim 1 wherein said filter chamber external surface includes at least two sets of slots and the filtration assembly includes flanges mating with one of said sets for seating the filtration assembly in said filter chamber.

10. An apparatus according to claim 9 including three of said sets of slots wherein said filtration assembly is seating in the middle slot.

11. An apparatus according to claim 10 including a plate-like baffle seated in the first set of slots upstream of said filtration assembly.

12. An apparatus according to claim 11 including a second filtration assembly seated in the third of said slots downstram of said filtration assembly.

13. An apparatus according to claim 1 including means on said filtration assembly permitting removal of the filtration assembly from said filter chamber.

14. An apparatus according to claim 7 wherein said plate-like baffle member is operative to force molten metal to the bottom of the filter chamber and to prevent floating inclusions from reaching the porous filter member.