Patent ID: 8251129
Filing Date: 2012-08-28
Classification: B22D,C04B

Abstract:
1. A refractory material having a mass which contains: a CaO component in an amount of 0.5 mass % or more; one or both of B 2 O 3 and R 2 O (R is one selected from the group consisting of Na, K and Li) in an amount of 0.5 mass % or more; Al 2 O 3 in an amount of 50 mass % or more; and free carbon in an amount of 8.0 to 34.5 mass %, wherein a total amount of CaO, B 2 O 3 and R 2 O is in the range of 1.0 to 15.0 mass %, and a mass ratio of CaO/(B 2 O 3 +R 2 O) is in the range of 0.1 to 3.0.