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US 9,428,421 B2Granted
Method for producing a refractory material based on magnesia or magnesia spinel, and refractory material based on magnesia or magnesia spinel
AssigneeRefractory Intellectual Property GmbH & Co. KG
InventorsHarald Harmuth, Sabine Gschiel, Zoltan Lences, Pavol Sajgalik
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Abstract
The invention relates to a method for producing a refractory material based on magnesia or magnesia spinel, and to a refractory material based on magnesia or magnesia spinel.
Claims14
A method for producing a refractory material based on magnesia or magnesia spinel with the following steps:
- 1.1 provision of a batch comprising
- 1.1.1 a first component made of at least one of the following materials:
- magnesia or magnesia spinel;
- 1.1.2 a second component comprising substances by means of which a binding phase comprising an AlN polytypoid can be formed when temperature is applied;
- 1.1.3 wherein the mean grain size of the first component is greater than the mean grain size of the second component;
- 1.2 application of temperature to the batch within a temperature range in which the second component forms a binding phase comprising an AlN polytypoid;
- 1.3 the batch is exposed to pressure during the application of temperature in this temperature range.
4 more elements
A refractory material based on magnesia or magnesia spinel produced by the following steps:
- producing a batch comprising,
- a first component made of at least one of the following materials:
- magnesia or magnesia spinel;
- a second component comprising substances by means of which a binding phase comprising an AlN polytypoid can be formed when temperature is applied;
- applying a temperature to the batch within a temperature range in which the second component forms a binding phase comprising an AlN polytypoid;
- wherein the mean grain size of the first component is greater than the mean grain size of the second component;
- exposing the batch to pressure during the application of temperature in the temperature range;
- wherein the structure whereof is made up of grains comprising at least one of the following substances:
- magnesia or magnesia spinel,
- wherein the grains are surrounded by a binding phase which comprises an AlN polytypoid.
7 more elements
Dependencies are inferred from the claim text.