David G Roth

US Patent:

7157042, Jan 2, 2007

Filed:

Feb 13, 2004

Appl. No.:

10/778456

Inventors:

David J. Roth - Downingtown PA, US

Assignee:

Altek-MDY, L.L.C. - Cleveland OH

International Classification:

C22B 7/04
C21B 3/04

US Classification:

266205, 266227

Abstract:

A dross compression apparatus and method includes one or more air nozzles for directing cooling air across the top of a compression head for cooling the compression head. The air may be vented through air vents in a wall of the apparatus after passing across the top of the compression head. Also a plurality of ribs may extend across the top of the compression head in the direction of the air vents in the wall of the apparatus for directing the air across the top of the compression head and out the air vents.

US Patent:

20010011788, Aug 9, 2001

Filed:

Mar 27, 2001

Appl. No.:

09/818332

Inventors:

David Roth - Downingtown PA, US
Peter Schirk - Devon PA, US
Scott Campbell - Pottstown PA, US

Assignee:

Altek International, Inc.

International Classification:

C22B007/04
C21B003/04
C21C007/00

US Classification:

266/205000, 266/227000, 266/232000

Abstract:

A dross press head is constructed of refractory material. The refractory material may be a vitreous silica based refractory or other suitable refractory material including ceramic material. The refractory head may include reinforcing fibers, which may be stainless steel fibers. The refractory head may be provided with refractory clips or anchor bolts and secured at its upper end to a metal plate for structural strength. One or more spikes may be formed on or mounted to a lower surface of the refractory head for aiding flow of the upper layer of metal recovered from the dross. The spikes may be constructed of refractory material including ceramic material, cast steel, cast iron or hot rolled steel. Spike material may be selected based on the type of dross. The spike may be formed on the head threadably mounted to a supporting rod mounted to the upper metal plate.

US Patent:

20070102853, May 10, 2007

Filed:

Dec 28, 2006

Appl. No.:

11/617052

Inventors:

David Roth - Downingtown PA, US

International Classification:

C21D 1/62

US Classification:

266259000

Abstract:

A cooling head for cooling material recovered from an industrial process when the material is disposed in a material container. The cooling head includes a downwardly projecting portion that is shaped to engage the material. A plurality of ribs may extend across a top of the cooling head.

US Patent:

20110083532, Apr 14, 2011

Filed:

Sep 16, 2010

Appl. No.:

12/883486

Inventors:

David J. Roth - Downingtown PA, US

Assignee:

ALTEK, L.L.C. - Exton PA

International Classification:

C22B 5/00
B02C 23/08

US Classification:

75414, 241 2425

Abstract:

A process for increasing the percentage of metal recovery from dross containing metal particles of different sizes having oxide and salt components adhered thereto. The process includes crushing and tumbling the dross to mechanically remove all of the oxide and salt components from the larger of the metal particles, separating the larger metal particles from the removed oxide and salt components and the smaller metal particles to provide a supply of larger metal particle concentrate, separating the removed oxide and salt components from the smaller metal particles, mechanically impacting the smaller metal particles to remove any additional oxide and salt components from the smaller metal particles, and separating the smaller metal particles from the additional oxide and salt components to provide a supply of smaller metal particle concentrate.

US Patent:

62283197, May 8, 2001

Filed:

Feb 5, 1999

Appl. No.:

9/245817

Inventors:

David J. Roth - Downingtown PA
Peter G. Schirk - Devon PA

Assignee:

Altek International, Inc. - Exton PA

International Classification:

C21B 304

US Classification:

266205

Abstract:

A portable dross pressing apparatus utilizes a frame which may be made portable by wheels, by forklift tubes or the like. A press head is mounted to an upper portion of the portable frame and a drive means is used to force a skim pot upwardly into juxtaposition with the press head wherein dross within the skim pot may be compressed between the skim pot and the press head. The pot and/or head may contain ribs which may or may not mate. The pressing components may be made of cast steel or of a refractory material, such as ceramic. A pot of refractory material would be constructed over a metal shell for reinforcement. Preferably, the skim pot and sow mold are mounted within a traveling frame which is movably mounted to the portable frame. The skim pot may be provided with an automatic dumping mechanism and the sow mold may be mounted on a slide drawer mechanism. In a preferred embodiment, the skim pot is provided with means for preheating which may either be a gas burner or electrical resistance heaters.

US Patent:

56699573, Sep 23, 1997

Filed:

Jun 12, 1996

Appl. No.:

8/662176

Inventors:

David J. Roth - Downingtown PA

Assignee:

Altek International, Inc. - Exton PA

International Classification:

C22B 700
C22B 2100

US Classification:

75585

Abstract:

A dross compression apparatus and method utilizes a dross compression head and a skim box or collector having mating ribs. The ribs may be any type of projection or shape of the head and skim box sufficient to form grooves in both sides of the dross which divide or substantially divide the dross. Improved plating of the aluminum metal and separation of the aluminum layers from the aluminum oxide are achieved by using pressures in the range of 50 to 70 pounds per square inch. The ribs by their cutting action through the dross enable the achieving of these pressures with lower rated hydraulic presses. Two specific embodiments are disclosed, one utilizing an elongated substantially hemispheric shaped head and the other utilizing a substantially hemispheric shaped head. In both embodiments, the head and receptacle or skim box are of substantially conforming shapes.

US Patent:

53971043, Mar 14, 1995

Filed:

Nov 22, 1993

Appl. No.:

8/155618

Inventors:

David Roth - Downingtown PA

Assignee:

Altek International - Exton PA

International Classification:

C22B 700
C22B 2100

US Classification:

266227

Abstract:

A dross compression apparatus utilizes a substantially hemispheric shaped receptacle in a dross collector and a complementing compression head which is provided with ribs to form grooves in the material formed between the head and the receptacle. The material formed between the head and the receptacle is substantially a shell comprised of an inner layer of aluminum oxide and outer layers of aluminum. The grooves in the shell enable the material to be more easily processed as the shell is readily broken for crushing. The compression head may be applied more than once to the aluminum dross and may be rotated between applications causing multiple grooves and increased decanting of aluminum. The compression head is provided with a water cooling system which more rapidly cools the aluminum dross and reduces the thermite reaction. The cast steel compression head reduces the air flow to the cooling dross thereby reducing the amount of oxygen available, oxidation and the thermite reaction.