Refractory delta cooling system

Patent metadata

Field	Value
Publication number	US-10337797-B2
Application number	US-201615258380-A
Country	US
Kind code	B2
Filing date	Sep 7, 2016
Priority date	Nov 15, 2013
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

Embodiments of the present invention comprise a refractory delta made from a refractory material having a cold-face side and a hot-face side. One or more electrode apertures are located in the refractory delta for receiving one or more electrodes. One or more cooling apertures extend from the cold-face side of the refractory material to adjacent the hot-face side of the refractory material. The one or more cooling apertures may further comprise a copper tube. A cooling system delivers a cooling liquid to the one or more cooling apertures, and the cooling liquid draws heat from the adjacent refractory material, including the hot-face side, and evaporates to allow replacement cooling liquid to further draw heat from the adjacent refractory material.

First claim

What is claimed is:

1. A refractory delta, comprising:
a cold-face side and a hot-face side formed from a unitary portion of refractory material;
one or more electrode apertures, wherein the one or more electrode apertures extend through the refractory delta from the cold-face side to the hot-face side, and wherein the one or more electrode apertures are configured to receive one or more electrodes;
a plurality of cooling apertures, wherein the plurality of cooling apertures extend from the cold-face side into the refractory delta; and
wherein the plurality of cooling apertures are configured to receive a cooling liquid that draws heat from the refractory delta and evaporates to allow replacement cooling liquid to further draw heat from the refractory delta.

2. The refractory delta of claim 1 , wherein the plurality of cooling apertures extend from the cold-face side through the hot-face side of the refractory delta.

3. The refractory delta of claim 1 , further comprising a copper tube in at least a portion of one or more of the plurality of cooling apertures.

4. The refractory delta of claim 1 , further comprising:
a channel located in the cold-face side;
wherein the channel communicates with one or more of the plurality of cooling apertures; and
wherein the channel directs water to the one or more of the plurality of cooling apertures.

5. The refractory delta of claim 1 , wherein the refractory delta is configured for use in a roof of an electric arc furnace (EAF), and wherein the roof of the EAF comprises an outer roof section and an inner roof section comprising the refractory delta.

6. The refractory delta of claim 1 , wherein the refractory delta is configured to receive the cooling liquid from a cooling system, wherein the cooling liquid comprises water and the water is supplied from a water supply manifold or an electrode cooling system.

7. The refractory delta of claim 1 , further comprising:
a sloped surface on the cold-faced side;
wherein the sloped surface communicates with the plurality of cooling apertures; and
wherein applying the cooling liquid to the cold-face side of the refractory comprises applying the cooling liquid to the sloped surface that directs the cooling liquid and aids in delivering the cooling liquid to one or more of the plurality of cooling apertures.

8. A method for cooling a refractory delta, the method comprising:
applying a cooling liquid to a cold-face side of a unitary portion of refractory material in a roof of an electric arc furnace (EAF);
capturing the cooling liquid in a plurality of cooling apertures in the unitary portion of refractory material, wherein the plurality of cooling apertures extend from the cold-face side into the refractory delta;
applying additional cooling liquid to the cold-face side of the refractory delta in the roof of the EAF as the cooling liquid evaporates from the plurality of cooling apertures; and
capturing the additional cooling liquid in the plurality of cooling apertures.

9. The method of claim 8 , wherein the plurality of cooling apertures extend from the cold-face side through a hot-face side of the refractory delta.

10. The method of claim 8 , wherein the plurality of cooling apertures comprise a copper tube in at least a portion of the plurality of cooling apertures; and wherein capturing the cooling liquid and the additional cooling liquid in the plurality of cooling apertures capturing the cooling liquid and the additional cooling liquid in the copper tube.

11. The method of claim 8 , wherein the refractory delta further comprises a channel located in the cold-face side that communicates with the plurality of cooling apertures; and wherein applying the cooling liquid to the cold-face side of the refractory delta in the roof of the EAF comprises applying the cooling liquid to the channel that directs the cooling liquid to the plurality of cooling apertures.

12. The method of claim 8 , wherein applying the cooling liquid and applying the additional cooling liquid comprises applying water and the water is supplied from a water supply manifold or an electrode cooling system.

13. The method of claim 8 , wherein the refractory delta comprises a sloped surface on the cold-face side that communicates with the plurality of cooling apertures; and wherein applying the cooling liquid to the cold-face of the refractory delta in the roof of the EAF comprises applying the cooling liquid to the sloped surface that directs the cooling liquid and aids in delivering the cooling liquid to one or more of the plurality of cooling apertures.

14. An electric arc furnace (EAF) roof cooling system, comprising:
an EAF roof comprising a refractory delta comprising a cold-face side and a hot-face side, one or more electrode holes for receiving one or more electrodes, and one or more channels extending along a portion of the cold-face side and extending from the cold-face side into the refractory delta; and
a cooling system, wherein the cooling system directs a cooling liquid to the one or more channels of the cold-face side of the refractory delta, wherein the one or more channels receive the cooling liquid, and wherein the cooling liquid facilitates transfer of heat from the hot-face side to the cold-face side and evaporates to allow replacement cooling liquid to further facilitate the transfer of heat from the hot-face side to the cold-face side.

15. The EAF roof cooling system of claim 14 , wherein the refractory delta further comprises one or more cooling apertures communicating with the one or more channels, and configured to receive the cooling liquid from the one or more channels.

16. The EAF roof cooling system of claim 15 , wherein at least one of the one or more cooling apertures extend from the cold-face side through the hot-face side of the refractory delta.

17. The EAF roof cooling system of claim 15 , wherein at least one of the one or more cooling apertures comprise a tube.

18. A refractory delta, comprising:
a unitary portion of refractory material having a cold-face side and a hot-face side;
one or more electrode holes configured to receive one or more electrodes;
one or more channels extending along a portion of the cold-face side and extending from the cold-face side into the refractory delta; and
wherein the one or more channels are configured to receive a cooling liquid that draws heat from the refractory delta and evaporates to allow replacement cooling liquid to further draw heat from the refractory delta.

19. The refractory delta of claim 18 , further comprising one or more cooling apertures communicating with the one or more channels, and configured to receive the cooling liquid from the one or more channels.

20. The refractory delta of claim 19 , wherein at least one of the one or more cooling apertures extend from the cold-face side through the hot-face side of the refractory delta.

21. The refractory delta of claim 19 , wherein at least one of the one or more cooling apertures comprise a tube.

Assignees

• Nucor Corp

Inventors

• Quintanilla Montemayor Omar A

Classifications

• F27D9/00

  Cooling of furnaces or of charges therein (casings, linings, walls or roofs incorporating cooling arrangements F27D1/12) · CPC title

• F27D1/1816 Primary

  Removable covers specially adapted for arc furnaces · CPC title

• F27B3/24

  Cooling arrangements · CPC title

• F27D2009/0032

  integrated with refractories in a panel · CPC title

• F27D1/18

  Door frames; Doors, lids or removable covers · CPC title