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1. (WO2018122590) PLAQUE DE REFROIDISSEMENT EN CUIVRE DOTÉE D'INSERTS RÉSISTANT À L'USURE, DESTINÉE À UN HAUT-FOURNEAU
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CLAIMS

1. Cooling plate (1) for a blast furnace, said cooling plate (1) comprising a copper body (2) having an inner face (3) comprising ribs (4-j) parallel therebetween, having first extremities (6) opposite therebetween and separated by grooves (5) having second extremities (7) opposite therebetween, characterized in that at least one of said ribs (4-j) comprises at least one housing (8) located between said first extremities (6) and comprising at least one insert (9) made of a wear resistant material that increases locally the wear resistance of said rib (4-j).

2. Cooling plate according to claim 1 , characterized in that said wear resistant material is chosen from a group comprising a metal and a ceramic.

3. Cooling plate according to claim 2, characterized in that said wear resistant metal is a wear-resistant steel or cast iron.

4. Cooling plate according to claim 2, characterized in that said wear resistant ceramic is silicon carbide, an extruded silicon carbide or other refractory material with good resistant to spalling and high hardness.

5. Cooling plate according to one of claims 1 to 4, characterized in that each housing (8) is a slot comprising an insert (9).

6. Cooling plate according to one of claims 1 to 4, characterized in that each housing (8) is a threaded hole in which a bolt, defining said insert (9), is screwed.

7. Cooling plate according to one of claims 1 to 6, characterized in that at least one of said grooves (5) comprises at least a part of a multilayer protrusion (10) extending between said second extremities (7) and comprising at least one layer (12) made of said wear resistant material that increases locally the wear resistance of neighboring ribs (4-j).

8. Cooling plate according to claim 7, characterized in that said multilayer protrusion (10) comprises a first layer (11) made of a material having a high

thermal conductivity, and a second layer (12) made of said wear resistant material and set on top of said first layer (1 1 ).

9. Cooling plate according to claim 8, characterized in that said material of said first layer (1 1 ) is chosen from a group comprising a high conductivity metal copper and a copper alloy.

10. Cooling plate according to one of claims 8 and 9, characterized in that each multilayer protrusion (10) is associated to a single groove (5).

1 1 . Cooling plate according to claim 10, characterized in that each multilayer protrusion (10) further comprises a third layer (13) sandwiched between said first (1 1 ) and second (12) layers and made of a material having a hardness intended for increasing hardness of said multilayer protrusion (10).

12. Cooling plate according to claim 1 1 , characterized in that said third layer (13) is made of a ceramic with good resistance to spalling and high hardness, such as SiC or extruded SiC.

13. Cooling plate according to one of claims 8 and 9, characterized in that the first (1 1 ) and second (12) layers of each multilayer protrusion (10) are respectively associated to two neighboring grooves (5).

14. Cooling plate according to claim 13, characterized in that said first layer (1 1 ) of each multilayer protrusion (10) comprises a slot (17) extending between said second extremities (7) and comprising an other insert (18) made of a material having a hardness intended for increasing hardness of said first layer (1 1 ).

15. Cooling plate according to claim 14, characterized in that said other insert (18) is made of a ceramic or of a wear-resistant and/or heat-resistant steel.

16. Cooling plate according to one of claims 1 to 15, characterized in that said inner face (3) of said copper body (2) comprises ribs (4-j) having at least two different heights.

17. Cooling plate according to one of claims 1 to 16, characterized in that said grooves (5) have a dovetail cross-section.

18. Blast furnace, characterized in that it comprises at least one cooling plate (1) according to one of the preceding claims.