Patent ID: 8093169
Filing Date: 2012-01-10
Classification: B22F,C04B,C21C,C22C,F27D

Abstract:
1. A sleeve brick having a thickness of 70 mm or less and obtained by carrying out steps comprising: preparing a forming mixture by adding a powder of one or more metals selected from the group consisting of aluminum (Al), silicon (Si), magnesium (Mg), calcium (Ca), chromium (Cr), and alloys thereof in an amount greater than 3 to 6 mass % and an organic binder to 100 mass % of a refractory raw material mixture containing 60 to 95 mass % of a magnesia raw material and 5 to 20 mass % of graphite; and subjecting the prepared forming mixture to kneading, forming, and heat treatment, wherein the magnesia raw material in the refractory raw material mixture includes a first particle fraction having a particle diameter of greater than 10 to 500 μm occupying 20 to 50 mass % and a second particle fraction having a particle diameter of 10 μm or less occupying 5 mass % or less.