Method for producing silicon carbide coated refractory grains and silicon carbide coated refractory grains
AssigneeRefractory Intellectual Property GmbH & Co. KG
InventorsDanting ZHAO, Hilmar SCHULZE-BERGKAMEN
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Abstract
The present invention provides a method for producing silicon carbide coated refractory grains comprising the following steps: a. Providing core refractory grains; b. Spraying an oxide sol onto said core refractory grains; c. Optionally mixing said core refractory grains with said oxide sol in a mixing device; d. Adding silicon carbide grains to said core refractory grains; and e. Mixing the mixture obtained in step d to obtain coated refractory grains having a core and a first silicon carbide coating layer.
Claims14
A method for producing silicon carbide coated refractory grains, said method comprising the steps of:
- a. Providing core refractory grains;
- b. Spraying an oxide sol onto said core refractory grains;
- c. Optionally mixing said core refractory grains with said oxide sol in a mixing device;
- d. Adding silicon carbide grains to said core refractory grains;
- and
- e. Mixing the mixture obtained in step d to obtain coated refractory grains having a core and a first silicon carbide coating layer.
A silicon carbide coated refractory grain comprising the following components:
- a. A core refractory grain having a particle size distribution with a first d50 value, and
- b. at least one coating layer, wherein said at least one coating layer comprises the following components:
- i. agglomerates of oxide particles, wherein said oxide particles consist of at least one of the following:
- silicon dioxide, magnesium oxide, calcium oxide, aluminium oxide;
- and
- ii. silicon carbide grains, wherein said silicon carbide grains have a particle size distribution with a second d50 value, said first d50 value being higher than said second d50 value.
Dependencies are inferred from the claim text.