Method for manufacturing brick for gravel-top brick and brick for brick-top and gravel-top brick using same

摘要

An object of the present invention is to provide a brick for a high temperature furnace which is excellent in water resistance and is improved in content line resistance and slag resistance. That is, according to one aspect of the present invention, it is preferable that the content of the carbonaceous raw material is in the range of 47 to 92 mass% and the aluminum oxynitride is 7 to 50 mass%, the total amount thereof is 84 mass% , The content of aluminum nitride is 3 mass% or less (including 0), the content of AlN polymorphous sialon,? '- sialon and silicon nitride is 3 mass% or less And the brick for a brick-furnace upper part is further provided with 7% by mass or more of the oxynitride of aluminum in the matrix portion.