Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – Means to melt and separate metal from mass of diverse...
Reexamination Certificate
1999-02-05
2001-05-08
Kastler, Scott (Department: 1742)
Metallurgical apparatus
Means for melting or vaporizing metal or treating liquefied...
Means to melt and separate metal from mass of diverse...
C266S227000
Reexamination Certificate
active
06228319
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to an improved apparatus for the recovery of metal, particularly aluminum, from dross. The present invention more particularly relates to a dross pressing apparatus which contains a number of significant advantages over the art including, but not limited to, portability, a rising pot, a pot with dumping action, use of refractory material in the pressing components, preheating of the pot, vibratory motion on full compression and a slide drawer mounted sow mold.
BACKGROUND OF THE INVENTION
Aluminum dross is a combination of aluminum metal and aluminum oxides, as well as other possible components such as various oxides, nitrates and carbides.
A number of dross pressing apparatus have been invented and utilized in the past. Two prior patents by David Roth, one of the inventors herein, are cited above and incorporated herein by reference. Other work has been done on dross recovery systems for aluminum melting including work disclosed in U.S. Pat. No. 4,527,779-Roth et al. and U.S. Pat. No. 4,386,956-Roth et al., of which the inventor herein is a joint inventor. The teachings of these patents are also incorporated herein by reference the same as if set forth at length.
SUMMARY OF THE INVENTION
The present invention provides a number of advantages over the prior art. One advantage of the present invention is that it provides a portable dross pressing apparatus which may be readily moved about a facility in which there is a need for dross pressing. In accordance with the present invention, this may be done by having the dross press constructed in a frame mounted on wheels, on a pallet jack, on skids or by providing it with forklift tubes for ease of transportation.
Another advantage of the present invention is the use in a portable press of a rising skim pot. This provides several advantages including increased stability as a result of the heavier components having a lower center of gravity, including the drive means for the pressing action being located lower in the frame. This is particularly important where the frame is being moved around the facility. Another advantage of the rising skim pot is a safer structure for a portable unit of this type as the risk of a press head falling is reduced.
Another advantage of the present invention is the provision of a refractory pot and or head which may be constructed of a suitable material, such as ceramic. In accordance with the present invention, the refractory pot may be comprised of a refractory material mounted to a metal shell for reinforcement.
Another advantage of the present invention is a removable/replaceable drain insert which provides longer life for the skim pot since the drain area is the area of greatest wear.
Another advantage of the present invention is the providing of vibratory action on full compression.
Another advantage of the present invention is the providing of a press where the skim pot may automatically dumped.
Another advantage of the present invention is the preheating of the skim pot.
Another advantage of the present invention is the provision of an electric motor driven compression system.
Another advantage of the present invention is the providing a sow mold in a dross press which is mounted on a slide drawer mechanism.
Another advantage of the present invention is the providing of an electric battery powered fully portable dross press or dross compression apparatus.
Briefly and basically, in accordance with the present invention, a dross compression apparatus is provided which comprises a portable frame with a press head mounted to an upper portion of the frame and means for forcing a skim pot upwardly into juxtaposed position with the press head wherein dross within the skim pot may be compressed between the skim pot and the press head.
The frame may be made portable by wheels mounted to the frame, mounting on a pallet jack, on skids or by the provision of forklift tubes mounted to the frame.
The dross press may include ribs on the head and or the inner surface of the skim pot. Where ribs are provided on both the head and the skim pot, these may or may not be mating. Mating ribs on the head and pot provide advantages as described in U.S. Pat. No. 5,669,957.
The press head may be constructed of a refractory material, such as ceramic material. The pot may also be constructed of refractory material with a reinforcing metal shell.
The rising skim pot is preferably mounted in a traveling frame mounted to the portable frame. The skim pot in the mounted frame may be driven upwardly by a hydraulic piston or by an electric motor drive means. A sow mold may be mounted within the traveling frame on a slide drawer structure wherein the sow mold may be slidably moved in a horizontal plane to a position where the sow mold is outside of the frame.
Electric or gas preheaters may be utilized to preheat the skim pot. The electric preheaters may be in the form of electric resistance heaters mounted within the refractory material of the skim pot.
The skim pot may be provided with a removable insert in a lower portion of the skim pot. The removable insert would include at least one drain hole. In this manner, the drain area may be replaced without replacement of the entire skim pot.
Additionally, vibratory motion may be provided when the skim pot is in full compression in juxtaposition of the head.
REFERENCES:
patent: 3798024 (1974-03-01), Murphy et al.
patent: 4050926 (1977-09-01), Lawson et al.
patent: 4057232 (1977-11-01), Ross et al.
patent: 4073481 (1978-02-01), Lawson et al.
patent: 4386956 (1983-06-01), Roth et al.
patent: 4523949 (1985-06-01), Gower et al.
patent: 4527779 (1985-07-01), Roth et al.
patent: 4540163 (1985-09-01), van Linden et al.
patent: 4952237 (1990-08-01), Dube et al.
patent: 4959100 (1990-09-01), Dube et al.
patent: 5020778 (1991-06-01), Thibault et al.
patent: 5397104 (1995-03-01), Roth
patent: 5540752 (1996-07-01), Spoel
patent: 5669957 (1997-09-01), Roth
patent: 5882580 (1999-03-01), Pownall
patent: 5980817 (1999-11-01), Pownall
Roth David J.
Schirk Peter G.
Altek International, Inc.
Kastler Scott
Petock, Esq. Michael F.
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