ARTIFICIAL SINTERED SAND AND ITS PRODUCING METHOD

摘要

PROBLEM TO BE SOLVED: To improve a mold strength by reducing an apparent porosity of an artificial sintered sand and reducing the absorption of liquid binder. SOLUTION: A producing method of the artificial sintered sand is performed, with which raw material contained of at least Al2O3and SiO2as the main components is granulated into a prescribed size and sintering-treatment is applied to it and the sand grain after sintering is reheated with a plasma flame-treatment and the surface is instantly fuse-vitrified. By this way, the apparent porosity on the surface can be made to be≤2%. COPYRIGHT: (C)2004,JPO&NCIPI