Method of priming filter for molten metal

Details Method of priming filter for molten metal Method of priming filter for molten metal

2005-02-23

2010-02-23

Wyszomierski, George (Department: 1793)

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

C266S227000, C266S089000

Reexamination Certificate

active

07666248

ABSTRACT:
A method is described for priming an in-line molten metal filtration unit having a porous ceramic or refractory filter mounted substantially horizontally in a filter box. This filter box has an inlet for molten metal and an outlet for molten metal, the outlet being a closeable outlet in an exit well connecting to the downstream side of the filter. The method of the invention comprises the steps of adding a molten metal to the filter box sufficient to entirely cover the upstream side of the filter with a depth of molten metal and temporarily sealing the outlet in the exit well. A steadily increasing vacuum is then applied to the closed exit well at a rate between 0.1 and 10 kPa per second by withdrawing a stream of air from the exit well by means of a fan or air venturi until molten metal begins to flow through the filter. At that point the vacuum is quickly released and the molten metal outlet is opened. Once the filter has been primed in this manner, flow of metal through the filter continues while requiring only a relatively low head of molten metal on the inlet side of the filter.

REFERENCES:
patent: 3661373 (1972-05-01), Cheltsov
patent: 4817918 (1989-04-01), Mochizuki et al.
patent: 5427602 (1995-06-01), DeYoung et al.
patent: 5673902 (1997-10-01), Aubrey et al.
patent: 5827982 (1998-10-01), Doutre et al.
patent: 853 972 (1952-10-01), None
patent: 877 958 (1953-05-01), None
patent: 60 005829 (1985-01-01), None
patent: 61 243133 (1986-10-01), None
patent: 06-49551 (1994-02-01), None
patent: WO 88/07165 (1988-09-01), None
patent: WO 3033748 (2003-04-01), None
Int'l Search Report for PCCT/CA2005/000248, dated Jun. 13, 2005.

Affiliated with

Also associated with

Rating

Method of priming filter for molten metal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of priming filter for molten metal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of priming filter for molten metal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4232239