US 5,505,893 AGranted

Method for manufacturing and repairing molten metal containment vessels

AssigneeMagneco/Metrel, Inc.

InventorCharles W. Connors, Jr.

Life of this patent

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Abstract

A method of manufacturing an open top, walled member for containing a molten metal, especially a flowing molten metal or reconstructing a worn or damaged member. The method includes the step of forming the inner walls of a mold which define the inner surfaces of the walled member of an open metal mesh screen which is meltable by the molten metal which is to be contained. The next step is to transfer, usually by pumping, an alumina-silicon carbide casting compound into the space between the open mesh metal screen and the outer walls defining the mold, which outer walls may be in situ structures. If an existing walled member is being repaired, any damaged or worn portions of the existing walled member are removed and the casting compound is poured in to replace these portions. The next step is to apply heat to dry the casting compound while the open mesh screen of the mold remains in place in contact with the casting compound. The final step involves removing the open screen mesh by flowing hot molten metal into the open top, walled containment member.

Claims32

Dependent claims

A method of manufacturing an open top, walled member, having side walls and a bottom surface, of a molten metal containment vessel, said open top, walled member having sufficient structural integrity to support a molten metal poured in said open top, walled member, said method comprising the steps of:

forming an inner wall of a mold having inner side walls and a bottom surface with a perforated sheet metal screen having a plurality of openings to allow air to freely flow therethrough and of a sufficient number to allow air curing, wherein said inner wall defines inside surfaces of said side walls and said bottom surface of said open top, walled member;
transferring a casting compound between an outer wall of said mold and said perforated sheet metal screen of said inner wall to form said open top, walled member having said side walls and said bottom surface;
applying heat to dry said casting compound while said perforated sheet metal screen of said inner wall of said mold remains in place in contact with said casting compound such that said plurality of openings in said perforated sheet metal screen allow air to freely flow therethrough to dry said casting compound so as to form said open top, walled member having said sufficient structural integrity to support a molten metal poured in said open top, walled member of said molten metal containment vessel;
and
removing said perforated sheet metal screen in contact with said casting compound.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/328,898Filed 25 Oct 1994 · division
Priority: 22 Mar 1991
Granted: 9 Apr 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

F27B 7/28
Details, accessories or equipment specially adapted for rotary-drum furnaces: arrangements of linings
B22D 41/023
Linings: apparatus used for making or repairing linings
C21C 1/06
Refining of pig-iron; Cast iron: constructional features of mixers for pig-iron
F27D 1/1626
Making or repairing linings ; Increasing the durability of linings; Breaking away linings: making linings by compacting a refractory mass in the…