Goahead
Aerospace
- Jul 13, 2003
- 625
Hello,
I would like to inquire on the feasibility and cost-effectivity of
tiling by ceramic materials a large and massive mild steel
implement used to remove dross and to stir molten aluminum
in a melting furnace. The area to be covered would be in
excess of 1.3 square meters.
Presently the mild steel is hardfaced by welding with a 12% Cr
steel. While the performance is adequate for a long time in a
pure molten aluminum bath, it is measured in only a few days
in alloyed aluminum bathes.
The refractory bricks used in the furnace itself are probably not
usable for this application. A brief search seemed to show that
the following materials could possibly be available in the form
of thin tiles, and should be resistant to molten aluminum:
graphite, AlN , Si3N4, Al2O3, sialons.
Which material should be selected?
If feasible, the tiles should possibly be fixed in place with a high
temperature resistant structural adhesive. The molten aluminum
is at about 800 deg C. (Tiles on the Space Shuttle and their
adhesive see possibly higher temperature).
Which adhesive would be suitable?
The joints between tiles should be sealed (made impervious) to
molten aluminum to preserve the mild steel.
Which material should be used for sealing?
Expert opinions would be appreciated.
Thanks,
I would like to inquire on the feasibility and cost-effectivity of
tiling by ceramic materials a large and massive mild steel
implement used to remove dross and to stir molten aluminum
in a melting furnace. The area to be covered would be in
excess of 1.3 square meters.
Presently the mild steel is hardfaced by welding with a 12% Cr
steel. While the performance is adequate for a long time in a
pure molten aluminum bath, it is measured in only a few days
in alloyed aluminum bathes.
The refractory bricks used in the furnace itself are probably not
usable for this application. A brief search seemed to show that
the following materials could possibly be available in the form
of thin tiles, and should be resistant to molten aluminum:
graphite, AlN , Si3N4, Al2O3, sialons.
Which material should be selected?
If feasible, the tiles should possibly be fixed in place with a high
temperature resistant structural adhesive. The molten aluminum
is at about 800 deg C. (Tiles on the Space Shuttle and their
adhesive see possibly higher temperature).
Which adhesive would be suitable?
The joints between tiles should be sealed (made impervious) to
molten aluminum to preserve the mild steel.
Which material should be used for sealing?
Expert opinions would be appreciated.
Thanks,
