Refractory ceramic batch composition, use of a batch composition of this type, and metallurgical melting vessel

Patent metadata

Field	Value
Publication number	US-10239791-B2
Application number	US-201515119711-A
Country	US
Kind code	B2
Filing date	Jan 22, 2015
Priority date	Apr 15, 2014
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

The invention relates to a refractory ceramic batch for the production of an unformed refractory ceramic batch, the use of a batch of this kind for lining metallurgical melting vessels and also a metallurgical melting vessel which is lined with an unformed refractory ceramic product based on a batch of this kind.

First claim

The invention claimed is:

1. A refractory ceramic batch for the production of an unformed refractory ceramic product which comprises the following raw materials:
1. 1 one or a plurality of magnesia-based raw materials low in iron with a fraction of 66 to 94% by mass;
1. 2 one or a plurality of calcium carbonate-based raw materials with a fraction of 5 to 30% by mass; and
1. 3 iron powder with a fraction of 1 to 6% by mass.

2. The batch according to claim 1 , wherein the fraction of iron in the magnesia-based raw materials low in iron, calculated as Fe 2 O 3 and relative to the total mass of the magnesia-based raw materials low in iron, is below 1.5% by mass.

3. The batch according to claim 1 , wherein the fraction of calcium in the magnesia-based raw materials low in iron, calculated as CaO and relative to the total mass of the magnesia-based raw materials low in iron, is below 5% by mass.

4. The batch according to claim 1 , wherein the fraction of magnesia in the magnesia-based raw materials low in iron, relative to the total mass of the magnesia-based raw materials low in iron, is above 90% by mass.

5. The batch according to claim 1 with magnesia-based raw materials low in iron in the form of at least one of the following raw materials: fused magnesia or sintered magnesia.

6. The batch according to claim 5 , wherein the magnesia-based raw materials low in iron have a grain size of maximum 10 mm.

7. The batch according to claim 1 , wherein the fraction of calcium carbonate in the calcium carbonate-based materials, relative to the total mass of the calcium carbonate-based raw materials, is above 90% by mass.

8. The batch according to claim 1 with calcium carbonate-based raw materials in the form of at least one of the following raw materials: limestone or dolomite.

9. The batch according to claim 8 , wherein the calcium carbonate-based raw materials have a grain size of maximum 8 mm.

10. The batch according to claim 1 , wherein the iron powder has a grain size of maximum 0.3 mm.

11. A method comprising:
lining metallurgical melting vessels with unformed refractory ceramic product, wherein the unformed refractory ceramic product comprises:
1. 1 one or a plurality of magnesia-based raw materials low in iron with a fraction of 66 to 94% by mass;
1. 2 one or a plurality of calcium carbonate-based raw materials with a fraction of 5 to 30% by mass; and
1. 3 iron powder with a fraction of 1 to 6% by mass.

12. The method of claim 11 , wherein a batch of the unformed refractory ceramic product is prepared using at least one plasticizer.

13. A metallurgical melting vessel which is lined with an unformed refractory ceramic product, wherein the unformed refractory ceramic product is produced by a batch which comprises the following raw materials:
1. 1 one or a plurality of magnesia-based raw materials low in iron with a fraction of 66 to 94% by mass;
1. 2 one or a plurality of calcium carbonate-based raw materials with a fraction of 5 to 30% by mass; and
1. 3 iron powder with a fraction of 1 to 6% by mass.

Assignees

• Refractory Intellectual Property Gmbh & Co Kg

Inventors

• Eckstein Wilfried
• Zettl Karl-Michael

Classifications

• F27D1/0006 Primary

  Linings or walls formed from bricks or layers with a particular composition or specific characteristics · CPC title

• C04B35/0435 Primary

  containing refractory metal compounds other than chromium oxide or chrome ore · CPC title

• C04B2235/5472

  Bimodal, multi-modal or multi-fraction · CPC title

• C04B2235/405

  Iron group metals · CPC title

• F23M5/00

  Casings; Linings; Walls · CPC title