Batch for producing an unshaped refractory ceramic product, method for producing an unshaped refractory ceramic product, and an unshaped refractory ceramic product produced thereby

Patent metadata

Field	Value
Publication number	US-11097982-B2
Application number	US-201716476709-A
Country	US
Kind code	B2
Filing date	Oct 19, 2017
Priority date	Jan 27, 2017
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

The invention relates to a batch for producing an unshaped refractory ceramic product, to a method for producing an unshaped refractory ceramic product, and to an unshaped refractory ceramic product produced by the method.

First claim

The invention claimed is:

1. A batch for producing an unshaped refractory ceramic product which has the following features:
1.1 the batch comprises the following components:
1.1.1 at least 60 mass % of a main component in the form of at least one raw material based on magnesia;
1.1.2 a component in the form of at least one chemically modified starch ether; and
1.1.3 a component in the form of at least one water-soluble chemical binder;

1.2 the batch comprises the following substances in the following mass proportions:
1.2.1 less than 10 mass % calcium oxide; and
1.2.2 less than 10 mass % carbon.

2. The batch according to claim 1 with a main component in the form of at least one of the following raw materials: sintered magnesia or fused magnesia.

3. The batch according to claim 1 , with a proportion of the main component in the range of from 60 to 98 mass %.

4. The batch according to claim 1 , with the component in the form of the at least one chemically modified starch ether in the form of at least one of the following chemically modified starch ethers: hydroxyalkyl starch ether, carboxyalkyl starch ether, hydroxyalkyl-carboxyalkyl starch ether, carbamoyl starch ether or cyanoalkyl starch ether.

5. The batch according to claim 1 , with a proportion of the component in the form of the at least one chemically modified starch ether in the range of from 0.01 to 1.0 mass %.

6. The batch according to claim 1 , with the component in the form of the at least one water-soluble chemical binder in the form of at least one of the following binders: at least one water-soluble sulphate, at least one water-soluble phosphate, or at least one water-soluble silicate.

7. The batch according to claim 1 , with a proportion of 1 to less than 40 mass % of at least one of the following raw materials for setting the basicity of the batch: limestone, dolomite, doloma, magnesite or olivine.

8. The batch according to claim 1 , with a component in the form of at least one clay.

9. The batch according to claim 1 , with a component in the form of fibres.

10. A method for producing an unshaped refractory ceramic product comprising the following steps:
10.1 providing a batch, the batch comprises:
at least 60 mass % of a main component in the form of at least one raw material based on magnesia;
a component in the form of at least one chemically modified starch ether; and
a component in the form of at least one water-soluble chemical binder,
wherein the batch comprises the following substances in the following mass proportions:
less than 10 mass % calcium oxide; and
less than 10 mass % carbon;

10.2 mixing the batch with water;
10.3 applying the batch mixed with water to a surface; and
10.4 firing the batch applied to the surface to form an unshaped refractory ceramic product.

11. An unshaped refractory ceramic product produced by a method, the method comprising:
11.1 providing a batch, the batch comprises:
at least 60 mass % of a main component in the form of at least one raw material based on magnesia;
a component in the form of at least one chemically modified starch ether; and
a component in the form of at least one water-soluble chemical binder,
wherein the batch comprises the following substances in the following mass proportions:
less than 10 mass % calcium oxide; and
less than 10 mass % carbon;

11.2 mixing the batch with water;
11.3 applying the batch mixed with water to a surface; and
11.4 firing the batch applied to the surface to form an unshaped refractory ceramic product.

Assignees

• Refractory Intellectual Property Gmbh & Co Kg

Inventors

• Lanzenberger Ronald

Classifications

• C04B35/013

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

• C04B2235/721

  Carbon content · CPC title

• C04B2235/424

  Carbon black · CPC title

• C04B2235/48

  Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins · CPC title

• C04B35/6306

  Binders based on phosphoric acids or phosphates · CPC title