Composition for providing a batch refractory ceramic product and method

Patent metadata

Field	Value
Publication number	US-10155696-B2
Application number	US-201715653756-A
Country	US
Kind code	B2
Filing date	Jul 19, 2017
Priority date	Jun 10, 2013
Publication date	Dec 18, 2018
Grant date	Dec 18, 2018

Abstract

Exemplary embodiments relate to a batch for producing an unshaped refractory ceramic product, to a method for producing a fired refractory ceramic product, to a fired refractory ceramic product and to the use of an unshaped refractory ceramic product.

First claim

I claim:

1. A method for producing a fired refractory ceramic product comprising the following steps:
1.1 provision of a batch comprising:
55 to 84% by mass of at least one magnesia-based raw material, and 16 to 45% by mass of raw magnesite comprising primarily magnesium carbonate, each relative to the total mass of the batch; wherein a total calcium carbonate content of the raw magnesite lies below 10% by mass relative to the total mass of raw magnesite;

1.2 applying the batch to a region of a furnace to be repaired or onto a tundish lining;
1.3 firing of the applied batch into a fired refractory ceramic product.

2. The method according to claim 1 for producing said fired refractory ceramic product which exhibits at least one of the following phases in the fractions indicated in each case:
forsterite:>5% by mass;
merwinite:<0.5% by mass;
relative to the total mass of the product in each case.

3. The method according to claim 1 for producing said fired refractory ceramic product, wherein at least one of the following oxides exhibits at most the fraction indicated in each case:
CaO<5% by mass;
Fe 2 O 3 <3.5% by mass;
Al 2 O 3 <3.0% by mass;
relative to the total mass of the product in each case.

Assignees

• Refractory Intellectual Property Gmbh & Co Kg
• Refractory Intellectual Property Gmbh & Co Lg

Inventors

• Eckstein Wilfried

Classifications

• C04B38/0067

  characterised by the density of the end product · CPC title

• C04B2235/3206

  Magnesium oxides or oxide-forming salts thereof · CPC title

• C04B2235/442

  Carbonates · CPC title

• C04B35/626

  Preparing or treating the powders individually or as batches {(pigments for ceramics C09C1/0009); preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B} · CPC title

• C04B2111/763

  High temperatures · CPC title