Refractory product for casting of steel, and plate for sliding nozzle device
Disclosed is a refractory product for casting of steel, which is capable of forming a dense surface layer which is high in terms of a slag infiltration suppressing ability and strong, in a surface region thereof efficiently or sufficiently or in an optimum state. The refractory product contains 1 mass % or more of free carbon, and 2 mass % to 15 mass % of an aluminum component as metal, with the remainder comprising a refractory material as a main composition, wherein the refractory product has a permeability of 1×10 −16 m 2 to 15×10 −16 m 2 .
1. A refractory product for casting of steel, the refractory product containing 1 mass % or more of free carbon, and 2 mass % to 15 mass % of an aluminum component as metal, with the remainder comprising a refractory material as a main composition, wherein the refractory product has a permeability of 1×10 −16 m 2 to 15×10 −16 m 2 .
2. The refractory product as claimed in claim 1 , wherein the aluminum component as metal is derived from one or more selected from the group consisting of metal aluminum, an aluminum-silicon alloy, and an aluminum-magnesium alloy.
3. The refractory product as claimed in claim 1 , wherein the refractory material is one or more selected from the group consisting of corundum, mullite, zirconia-mullite, sillimanite, alumina-zirconia, spinel, and magnesia.
4. The refractory product as claimed in claim 1 , which contains one or more types of compounds having a carbon oxidation prevention effect, in a total amount of 5 mass % or less.
5. A plate for a sliding nozzle device, wherein an entirety or a part of the plate is composed of the refractory product as claimed in claim 1 , wherein the part of the plate includes a region configured to come into contact with molten steel.
6. The refractory product as claimed in claim 2 , wherein the refractory material is one or more selected from the group consisting of corundum, mullite, zirconia-mullite, sillimanite, alumina-zirconia, spinel, and magnesia.
7. The refractory product as claimed in claim 2 , which contains one or more types of compounds having a carbon oxidation prevention effect, in a total amount of 5 mass % or less.
8. The refractory product as claimed in claim 3 , which contains one or more types of compounds having a carbon oxidation prevention effect, in a total amount of 5 mass % or less.
9. The refractory product as claimed in claim 6 , which contains one or more types of compounds having a carbon oxidation prevention effect, in a total amount of 5 mass % or less.
10. A plate for a sliding nozzle device, wherein an entirety or a part of the plate is composed of the refractory product as claimed claim 2 , wherein the part of the plate includes a region configured to come into contact with molten steel.
11. A plate for a sliding nozzle device, wherein an entirety or a part of the plate is composed of the refractory product as claimed claim 3 , wherein the part of the plate includes a region configured to come into contact with molten steel.
12. A plate for a sliding nozzle device, wherein an entirety or a part of the plate is composed of the refractory product as claimed claim 4 , wherein the part of the plate includes a region configured to come into contact with molten steel.
13. A plate for a sliding nozzle device, wherein an entirety or a part of the plate is composed of the refractory product as claimed claim 6 , wherein the part of the plate includes a region configured to come into contact with molten steel.
14. A plate for a sliding nozzle device, wherein an entirety or a part of the plate is composed of the refractory product as claimed claim 7 , wherein the part of the plate includes a region configured to come into contact with molten steel.
15. A plate for a sliding nozzle device, wherein an entirety or a part of the plate is composed of the refractory product as claimed claim 8 , wherein the part of the plate includes a region configured to come into contact with molten steel.
16. A plate for a sliding nozzle device, wherein an entirety or a part of the plate is composed of the refractory product as claimed claim 9 , wherein the part of the plate includes a region configured to come into contact with molten steel.