| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide spherical molding sand and producing method therefor and this mold for casting with which the mold for casting, excellent in corrosion resistance, sand burning resistance and also, excellent in strength and surface flatness can be produced, as ceramic particles. <P>SOLUTION: The ceramic particles produced with a flame-fusion method, wherein the ceramic particles contain MgO and SiO<SB>2</SB>as main components, and have 0.1-10 weight ratio of MgO/SiO<SB>2</SB>and 0.001-1.5mm average particle size. The spherical molding sand produced with the flame-fusion method, wherein the spherical molding sand contains MgO and SiO<SB>2</SB>as the main components, and has 0.1-10 weight ratio of MgO/SiO<SB>2</SB>and 0.001-1.5mm average particle size. The spherical molding sand, wherein the spherical molding sand comprises MgO and SiO<SB>2</SB>as the main components, and has 0.1-10 weight ratio of MgO/SiO<SB>2</SB>and 0.001-1.5mm average particle size and ≥0.95 spherical degree. The producing method for this molding sand as defined above, the mold for casting containing this spherical molding sand as defined above and the casting produced by casting with the mold as defined above. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
