INORGANIC COATED SAND AND METHOD FOR PRODUCING THE SAME

To provide a technique related to an inorganic coated sand, capable of improving the mechanical strength of molds.SOLUTION: A method for producing an inorganic coated sand includes the steps of: mixing a refractory aggregate and a binder composition containing water glass, and forming a coating layer containing a solid content of the water glass on a surface of the refractory aggregate by evaporating the water, to obtain a coated refractory aggregate; and mixing the coated refractory aggregate with inorganic particles.SELECTED DRAWING: None 【課題】鋳型の機械的強度を向上できる無機コーテッドサンドに関する技術を提供する。【解決手段】無機コーテッドサンドの製造方法は、耐火性骨材と、水ガラスを含む粘結剤組成物とを混合し、水分を蒸発させることにより当該水ガラスの固形分を含む被覆層を前記耐火性骨材の表面に形成し、被覆耐火性骨材を得る工程と、前記被覆耐火性骨材と、無機粒子とを混合する工程と、を含む。【選択図】なし