RECEPTACLE FOR HANDLING MOLTEN METAL, CASTING ASSEMBLY AND MANUFACTURING METHOD

• US 20130334744A1
• Filed: 06/07/2013
• Published: 12/19/2013
• Est. Priority Date: 06/14/2012
• Status: Active Grant

• Current Assignee: Pyrotek Incorporated
• Original Assignee: Pyrotek Incorporated
• Inventors: TREMBLAY, Sylvain, BOUCHARD, Jens, BOUCHARD, Michael
• Granted Patent: US 9,073,119 B2
• Time in Patent Office: Days
• US Class Current: 266/200
• CPC Class Codes: B22D 41/005 with heating or cooling means
• CPC Class Codes: B22D 41/015 with external heating, i.e. the heat source not being a part of the ladle
• CPC Class Codes: F27D 3/145 Runners therefor

Abstract

A receptacle for handling molten metal is provided. The receptacle has bottom and side walls and includes a refractory defining a cavity within which the molten metal is conveyed or contained. The receptacle has at least one channel extending within at least one of its walls. The channel has an inlet and an outlet. The inlet is connectable to a source for circulating a fluid within the channel. The outlet allows the fluid to be expelled from said channel. The channel allows, when the fluid is circulated in it, to regulate the temperature of the refractory and thereby of the metal conveyed or contained. A casting assembly and a method for casting the refractory are also provided.

Claims

1. A receptacle for handling molten metal, said receptacle comprising:

bottom and side walls comprising a refractory defining a cavity within which the molten metal is conveyed or contained;

at least one channel extending within at least one of said walls, said channel having an inlet and an outlet, the inlet being connectable to a source for circulating a fluid within said channel, the outlet allowing said fluid to be expelled from said channel, said channel allowing, when the fluid is circulated therethrough, to regulate the temperature of the refractory and thereby of the metal conveyed or contained.

2. The receptacle according to claim 1, wherein the refractory is obtained by casting a composition of precursors into a mould and by heating said composition.

3. The receptacle according to claim 1, wherein the at least one channel comprises two channels, each extending within a respective one of the side walls.

4. The receptacle according to claim 3, wherein each of the two channels extend longitudinally within a given one of the side and bottom walls.

5. The receptacle according to claim 1, further comprising rods extending transversally through the at least one channel.

6. The receptacle according to claim 1, further comprising a heating element located within the at least one channel.

7. The receptacle according to claim 1, wherein said at least one channel comprises several sub-channels which unite near the inlet and the outlet.

8. The receptacle according to claim 7, wherein the several sub-channels extend transversally in the side and bottom walls.

9. The receptacle according to claim 1, further comprising a first longitudinal collecting channel extending in a first one of the side wall connected to the inlet and a second longitudinal collecting channel extending along another one of the side walls, connected to the outlet.

10. The receptacle according to claim 1, wherein the side and bottom walls comprise at least one insulating layer.

11. The receptacle according to claim 1, wherein the at least one channel extends within the refractory.

12. The receptacle according to claim 10, wherein the at least one channel extends within the at least one insulating layer.

13. The receptacle according to claim 10, wherein the at least one channel extends between the refractory and the at least one insulating layer.

14. The receptacle according to claim 1, wherein the receptacle is a launder section, the side walls comprising two opposed side walls, the two opposed side walls and the bottom wall providing the receptacle with a U-shape with two opened extremities, each side wall having an inner surface facing toward the cavity, an opposed outer surface, a top surface and opposed end surfaces at the opened extremities.

15. The receptacle according to claim 14, wherein at least one of the inlet and the outlet of the at least one channel open on one of the end surfaces for allowing connection of said at least one channel to a channel of an adjacent launder section.

16. The receptacle according to claim 14, wherein at least one of the inlet and the outlet of the at least one channel open on or near the top surface.

17. The receptacle according to claim 1, wherein the side walls of the receptacle comprise two pairs of opposed side walls, each side wall having an inner surface facing toward the cavity, and an opposed outer surface, wherein an entry is provided in one of the sidewalls for receiving molten metal, and an exit is provided in another one of the side walls, for allowing exit of the molten metal, and wherein one of the side or bottom walls is provided with a drain.

18. The receptacle according to claim 1, in combination with a deflector connected to the outlet of the at least one channel, for directing the expelled fluid toward the refractory.

19. An assembly for conveying molten metal, said assembly comprising several launder sections as defined in claim 14, each channel communicating with a corresponding channel of at least one adjacent section.

20. The assembly to claim 19, further comprising channel sealing elements for sealingly connecting channels of adjacent sections.

21. The receptacle according to claim 1, in combination with the source for circulating the fluid within at least one channel.

22. The receptacle in combination with the source, according to claim 21, wherein the source comprises an air blower.

23. A casting assembly for casting the refractory according to claim 1, comprising:

a core for forming said at least one channel; and

a mold (74) having a hollow shape, for receiving a castable a composition of precursors.

24. The casting assembly according to claim 23, wherein the core is provided with holes for forming rods within the at least one channel.

25. A method for casting the refractory according to claim 1, the method comprising the steps of:

a) providing a casting assembly with a mold with two openings corresponding to the inlet and the outlet of the at least one channel, and a core for forming said at least one channel;

b) inserting said core within said mold so that ends of the core fit through the openings of the mold, respectively;

c) pouring a castable composition of precursors of a refractory paste into the mold;

d) allowing the composition to solidify;

e) heating the castable composition of step d); and

f) removing the core from the cured refractory.