Granule for producing a fire-proof product, use of such granules, fire-proof product, method for producing a fire-resistant product, and product produced by said method

Patent metadata

Field	Value
Publication number	US-10981837-B2
Application number	US-201515776070-A
Country	US
Kind code	B2
Filing date	Dec 1, 2015
Priority date	Dec 1, 2015
Publication date	Apr 20, 2021
Grant date	Apr 20, 2021

Abstract

The invention relates to a grain for production of a refractory product, to the use of such grains, to a refractory product, to a process for producing a refractory product and to a refractory product produced thereby.

First claim

The invention claimed is:

1. A refractory product, having a use temperature exceeding 600° C., comprising a grain, said grain comprising zirconium carbonitride and zirconium dioxide, wherein said zirconium dioxide is in the form of a room temperature metastable mineral phase in cubic modification.

2. The product as claimed in claim 1 in the form of a wearing part in continuous steel casting.

3. The product as claimed in claim 2 in the form of a slide plate, a monoblock stopper, a nozzle, an immersed tube or a submerged entry nozzle.

4. The product as claimed in claim 1 , wherein zirconium carbonitride is concentrated in the edge region of the grain.

5. The product as claimed in claim 1 , wherein the grain has a proportion of zirconium carbonitride in the range from 1% to 99% by mass.

6. The product as claimed in claim 1 , wherein the grain has a proportion of zirconium dioxide in the range from 1% to 99% by mass.

7. The product as claimed in claim 1 , wherein the grain comprises the following elements in the following proportions by mass:
zirconium: 5-97%;
oxygen: 1-50%;
nitrogen: 1-30%;
carbon: 1-30%;
hafnium: 0-4%;
calcium: 0-8%;
yttrium: 0-8%;
iron: 0-2%;
aluminum: 0-2%; and
silicon: 0-2%.

8. A process for producing a refractory product, having a use temperature exceeding 600° C., comprising the following steps:
providing grains for production of a refractory product, wherein the grains comprise zirconium carbonitride and zirconium dioxide, wherein said zirconium dioxide is in the form of a room temperature metastable mineral phase in cubic modification;
combining the grains with further refractory raw materials;
pressing a shaped body from the grains and the further refractory raw materials; and
firing the shaped body to give a refractory product.

9. A refractory product having a use temperature exceeding 600° C., the refractory product produced by the following process:
providing grains for production of a refractory product, wherein said grains comprise zirconium carbonitride and zirconium dioxide, wherein said zirconium dioxide is in the form of a room temperature metastable mineral phase in cubic modification;
combining the grains with further refractory raw materials;
pressing a shaped body from the grains and the further refractory raw materials; and
firing the shaped body to give a refractory product.

Assignees

• Refractory Intellectual Property Gmbh & Co Kg

Inventors

• Bauer Christoph
• Freiberger Norbert

Classifications

• C04B2235/3206

  Magnesium oxides or oxide-forming salts thereof · CPC title

• C04B2235/424

  Carbon black · CPC title

• C04B2235/3272

  Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite · CPC title

• C04B2235/3865

  Aluminium nitrides · CPC title

• C04B2235/425

  Graphite · CPC title