Title:
SILICON NITRIDE REFRACTORY
Document Type and Number:
Japanese Patent JP2020125220
Kind Code:
A
Abstract:
To provide a silicon nitride refractory for a blast furnace tuyere, which has improved spalling resistance and is excellent in flowability, and the texture of which can be elaborated.SOLUTION: The composition of a silicon nitride casting material is as follows: 70-95 mass% of silicon nitride, 2-15 mass% of zirconia, 1-5 mass% of silica ultra-fine powder, and 0.5-5 mass% of metal silicon. By this composition, the silicon nitride casting material can be obtained which is excellent in flowability and the texture of which can be elaborated; and when the casting material is molded into a refractory for a blast furnace tuyere, high spalling resistance can be obtained.SELECTED DRAWING: None
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Inventors:
YAMAMOTO YUGA
Application Number:
JP2019018030A
Publication Date:
August 20, 2020
Filing Date:
February 04, 2019
Export Citation:
Assignee:
SHINAGAWA REFRACTORIES CO
International Classes:
C04B35/567; B22D41/02; C04B35/66; F27D1/16
Attorney, Agent or Firm:
Toyoake Fukui