Refractory delta cooling system

Patent metadata

Field	Value
Publication number	US-9464846-B2
Application number	US-201314081739-A
Country	US
Kind code	B2
Filing date	Nov 15, 2013
Priority date	Nov 15, 2013
Publication date	Oct 11, 2016
Grant date	Oct 11, 2016

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:
refractory material having a cold-face side and a hot-face side, wherein the refractory material is a unitary portion of material;
one or more electrode apertures in the refractory material for receiving one or more electrodes;
a plurality of cooling apertures extending from the cold-face side of the refractory material to adjacent the hot-face side of the refractory material; and
wherein the one or more cooling apertures are configured to receive a cooling liquid that draws heat from the refractory material and evaporates to allow replacement cooling liquid to further draw heat from the refractory material.

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

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 , wherein the cold-face side of the refractory delta comprises:
a channel;
wherein the channel communicates with the plurality of cooling apertures; and
wherein when the refractory delta is located within a roof of an electric arc furnace (EAF) and the channel directs cooling liquid from a cooling system and aids in delivering the cooling liquid to the one or more cooling apertures.

5. The refractory delta of claim 1 , wherein the cold-face side of the refractory delta comprises:
a sloped surface;
wherein the sloped surface communicates with the plurality of cooling apertures; and
wherein when located within a roof of an electric arc furnace (EAF) the sloped surface directs cooling liquid from a cooling system and aids in delivering the cooling liquid to the plurality of cooling apertures.

6. A roof for an electric arc furnace (EAF), comprising:
an outer roof section;
an inner roof section comprising:
a refractory material having a cold-face side and a hot-face side, wherein the refractory material is a unitary portion of material;
one or more electrode apertures for receiving one or more electrodes;
a plurality of cooling apertures extending from the cold-face side of the refractory material to adjacent the hot-face side of the refractory material; and
wherein the plurality of cooling apertures are configured to receive a cooling liquid that draws heat from the refractory material and evaporates to allow replacement cooling liquid to further draw heat from the refractory material.

7. The roof for the EAF of claim 6 , wherein the plurality of cooling apertures are through holes that extend from the cold-face side through the hot-face side of the refractory material.

8. The roof for the EAF of claim 6 , further comprising a copper tube in at least a portion of one or more of the plurality of cooling apertures.

9. The roof for the EAF of claim 6 , further comprising:
a channel or a sloped surface;
wherein the channel or the sloped surface communicates with the plurality of cooling apertures; and
wherein the channel or the sloped surface directs cooling liquid from a cooling system and aids in delivering the cooling liquid to the plurality of cooling apertures.

10. The roof for the EAF of claim 9 , wherein the cooling liquid comprises water and the cooling system is a water supply manifold or an electrode cooling system.

11. A refractory delta cooling system, comprising:
an electric arc furnace (EAF) roof with an outer roof section and an inner roof section;
wherein the inner roof section comprises:
a refractory material;
a cold-face side and a hot-face side;
one or more electrode apertures for receiving one or more electrodes;
a plurality of cooling apertures extending from the cold-face side of the refractory material to adjacent the hot-face side of the refractory material;
wherein the plurality of cooling apertures are configured to receive a cooling liquid that draws heat from the refractory material and evaporates to allow replacement cooling liquid to further draw heat from the refractory material; and

a cooling system, wherein the cooling system directs a cooling liquid to the plurality of cooling apertures.

12. The refractory cooling system of claim 11 , wherein the plurality of cooling apertures are through holes that extend from the cold-face side through the hot-face side of the refractory material.

13. The refractory cooling system of claim 11 , wherein the inner roof section further comprises a copper tube in at least a portion of one or more of the plurality of cooling apertures.

14. The refractory cooling system of claim 11 , wherein the cold-face side of the refractor material of the inner roof section further comprises:
a channel or a sloped surface;
wherein the channel or the sloped surface communicates with the plurality of cooling apertures; and
wherein the channel or the sloped surface directs cooling liquid from the cooling system and aids in delivering the cooling liquid to the plurality of cooling apertures.

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

16. The method of claim 15 , wherein the plurality of cooling apertures are through holes that extend from the cold-face side through the hot-face side of the refractory material.

17. The method of claim 15 , wherein the plurality of cooling apertures comprise a copper tube in at least a portion of one or more of the plurality of cooling apertures; and wherein capturing the cooling liquid and the additional cooling liquid in the plurality of cooling apertures comprises capturing the cooling liquid and the additional cooling liquid in the copper tube.

18. The method of claim 15 , wherein the cold-face side of the refractory delta comprises:
a channel or a sloped surface;
wherein the channel or the sloped surface 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 channel or the sloped surface that directs the cooling liquid and aids in delivering the cooling liquid to the plurality of cooling apertures.

19. The method of claim 18 , 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.

20. A refractory delta cooling system, comprising:
an electric arc furnace (EAF) roof comprising an outer roof section and an inner roof section;
wherein the inner roof section is a refractory delta and comprises:
a refractory material;
a cold-face side and a hot-face side;
one or more electrode holes for receiving one or more electrodes; and

a cooling system, wherein the cooling system directs a cooling liquid to t

Assignees

• Nucor Corp

Inventors

• Quintanilla Montemayor Omar A

Classifications

• F27B3/24

  Cooling arrangements · CPC title

• F27D9/00 Primary

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

• F27D2009/0032

  integrated with refractories in a panel · CPC title

• F27D1/1816 Primary

  Removable covers specially adapted for arc furnaces · CPC title

• F27D1/18

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