COMPOSITE DEGASSING TUBE

• US 20140210144A1
• Filed: 01/31/2013
• Published: 07/31/2014
• Est. Priority Date: 01/31/2013
• Status: Abandoned Application

• Current Assignee: Pyrotek Incorporated
• Original Assignee: Pyrotek Incorporated
• Inventors: Torres, Carlos Gibran Sanchez, Nilson, Lee Andrew
• Application Number:
  US13/755,867
• Publication Number:
  US 20140210144A1
• Time in Patent Office: Days
• US Class Current: 266/207
• CPC Class Codes: F27D 3/16 Introducing a fluid jet or current into the charge porous elements for gas flushing of molten metals B22D1/005

Abstract

Disclosed is a degassing tube formed, at least partially, of a composite material and configured to degas molten metal. The degassing tube may include a supply tube configured to deliver gas received from a supply source to an outlet of the degassing tube, and a diffuser body coupled to the supply tube and formed, at least partially, of a composite material. In some embodiments, a combination of the composite material and a phosphate bonded refractory material may be used to form respective sections of the diffuser body. The composite material may include layers of a woven fiber reinforcing fabric embedded within a ceramic matrix. In some embodiments, the phosphate bonded refractory material is a castable monolithic refractory which chemically bonds to the composite material.

Claims

1. A degassing tube comprising:

a supply tube configured to deliver gas from a supply source to an outlet of the degassing tube; and

a diffuser body coupled to the supply tube and formed, at least partially, of a composite material comprising a reinforcing fiber within a ceramic matrix, the diffuser body configured to diffuse the gas within molten metal at the outlet of the degassing tube.

2. The degassing tube of claim 1, wherein the reinforcing fiber is part of a woven fiber reinforcing fabric embedded within the ceramic matrix.

3. The degassing tube of claim 2, wherein the woven fiber reinforcing fabric comprises a glass and the ceramic matrix comprises calcium silicate and silica.

4. The degassing tube of claim 1, wherein the outlet comprises an interconnection of conduits in the composite material at a distal section of the degassing tube.

5. The degassing tube of claim 1, wherein the diffuser body is formed of a combination of the composite material for a proximal section of the degassing tube and a phosphate bonded refractory material for a distal section of the degassing tube.

6. The degassing tube of claim 5, wherein the phosphate bonded refractory material is a castable monolithic refractory.

7. The degassing tube of claim 5, wherein the phosphate bonded refractory material is alumina-based.

8. The degassing tube of claim 5, wherein a portion of the diffuser body at the distal section is chemically bonded to another portion of the diffuser body at the proximal section.

9. The degassing tube of claim 1, wherein a geometry of the degassing tube is at least one of an L-shape or a T-shape.

10. A degassing tube comprising:

a supply tube configured to deliver gas from a supply source to an outlet of the degassing tube; and

a diffuser body coupled to the supply tube and configured to diffuse the gas within molten metal at the outlet of the degassing tube, the diffuser body;

being formed, at least partially, of a composite material at a proximal section of the degassing tube, and

being formed, at least partially, of a refractory material at a distal section of the degassing tube.

11. The degassing tube of claim 10, wherein the refractory material comprises a phosphate bonded refractory material.

12. The degassing tube of claim 10, further comprising an elastomeric material disposed around the supply tube.

13. The degassing tube of claim 10, wherein the composite material includes multiple layers of a woven fiber reinforcing fabric embedded within a ceramic matrix.

14. The degassing tube of claim 13, wherein the ceramic matrix is calcium silicate-based.

15. The degassing tube of claim 13, wherein the ceramic matrix is selected from the group consisting of fused silica, alumina mullite, silicon carbide, silicon nitride, silicon aluminium oxy-nitride, zircon, magnesia, zirconia, graphite, calcium silicate, boron nitride, aluminium nitride, and mixtures of these materials.

16. The degassing tube of claim 13, wherein the supply tube is disposed under the multiple layers of the woven fiber reinforcing fabric.

17. The degassing tube of claim 11, wherein the phosphate bonded refractory material is alumina-based and includes phosphoric acid.

18. The degassing tube of claim 11, wherein a portion of the diffuser body at the distal section is chemically bonded to another portion of the diffuser body at the proximal section.

19. The degassing tube of claim 11, wherein the phosphate bonded refractory material is a castable monolithic refractory.

20. A degassing tube comprising:

means for delivering gas from a supply source to an outlet of the degassing tube; and

means for diffusing the gas within molten metal at the outlet of the degassing tube, the means for diffusing being formed, at least partially, of a composite material comprising a reinforcing fiber within a ceramic matrix.