Batch for production of a refractory magnesia-carbon product or a refractory alumina-magnesia-carbon product, a process for the production of a product of this type, a product of this type as well as the use of a product of this type

Patent metadata

Field	Value
Publication number	US-9969650-B2
Application number	US-201515511473-A
Country	US
Kind code	B2
Filing date	Jun 29, 2015
Priority date	Oct 1, 2014
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

The invention concerns a batch for the production of a refractory magnesia-carbon product or a refractory alumina-magnesia-carbon product, a process for the production of a refractory magnesia-carbon product or a refractory alumina-magnesia-carbon product, a refractory magnesia-carbon product or a refractory alumina-magnesia-carbon product as well as the use of a magnesia-carbon product or a refractory alumina-magnesia-carbon product.

First claim

The invention claimed is:

1. A batch for the production of a refractory carbon-bonded product, comprising the following components in the following proportions by weight, respectively with respect to the total weight of the product:
70% to 97% by weight of a base component;
1.0% to 2.3% by weight of a binder component in the form of at least one resol;
1.5 to 3% by weight of a binder component in the form of at least one pitch;
1.0% to 28% by weight of a carbon component in the form of at least one of the following carbon sources: graphite or carbon black.

2. The batch as claimed in claim 1 , having a binder component in the form of at least one pitch in the form of coaltar pitch.

3. The batch as claimed in claim 1 , having a base component formed by a magnesia component or an alumina-magnesia component.

4. The batch as claimed in claim 3 , having a magnesia component in the form of at least one of the following MgO-based raw materials: fused magnesia or sintered magnesia.

5. The batch as claimed in claim 3 , having an alumina-magnesia component in the form of at least one of the following MgO- or Al 2 O 3 -based raw materials: fused corundum, sintered corundum, bauxite, magnesia spinel, sintered magnesia or fused magnesia, wherein the raw materials comprise MgO as well as Al 2 O 3 .

6. The batch as claimed in claim 1 , having a proportion of solid resin of less than 0.5% by weight.

7. A process for the production of a refractory carbon-bonded product, comprising the following steps:
providing a batch, the batch comprising the following components in the following proportions by weight, respectively with respect to the total weight of the product:
70% to 97% by weight of a base component;
1.0% to 2.3% by weight of a binder component in the form of at least one resol;
1.5 to 3% by weight of a binder component in the form of at least one pitch;
1.0% to 28% by weight of a carbon component in the form of at least one of the following carbon sources: graphite or carbon black;

shaping the batch into a shaped article;
tempering the shaped article; and
applying heat to the tempered shaped article in a manner such that the carbon of the binder components as well as of the carbon component forms a carbon bond in order to produce a refractory carbon-bonded product.

8. A refractory carbon-bonded product produced by a process, the process comprising:
providing a batch, the batch comprising the following components in the following proportions by weight, respectively with respect to the total weight of the product:
70% to 97% by weight of a base component;
1.0% to 2.3% by weight of a binder component in the form of at least one resol;
1.5 to 3% by weight of a binder component in the form of at least one pitch;
1.0% to 28% by weight of a carbon component in the form of at least one of the following carbon sources: graphite or carbon black;
shaping the batch into a shaped article;
tempering the shaped article; and
applying heat to the tempered shaped article in a manner such that the carbon of the binder components as well as of the carbon component forms a carbon bond in order to produce a refractory carbon-bonded product.

Assignees

• Refractory Intellectual Property Gmbh & Co Kg

Inventors

• Ebner Clemens
• Neubauer Bernd
• Rief Andreas
• Maranitsch Alexander
• Trummer Bernd

Classifications

• C04B35/013

  containing carbon (C04B35/103 takes precedence) · CPC title

• C04B35/043 Primary

  Refractories from grain sized mixtures · CPC title

• C04B35/63476

  Phenol-formaldehyde condensation polymers · CPC title

• C04B35/443

  Magnesium aluminate spinel · CPC title

• C04B35/63496

  Bituminous materials, e.g. tar, pitch · CPC title