TWI776478B
A method for reproducing molding sand according to an embodiment of the present invention reproduces used molding sand, to a surface of which an inorganic binder is adhered. The method includes: a pulverizing step for pulverizing a sand mold used for casting, and collecting the molding sand; a water...
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| Zusammenfassung: | A method for reproducing molding sand according to an embodiment of the present invention reproduces used molding sand, to a surface of which an inorganic binder is adhered. The method includes: a pulverizing step for pulverizing a sand mold used for casting, and collecting the molding sand; a water washing step for washing, after the pulverizing step, the molding sand while being stirred in water at 5℃ to 100℃ inclusive; and a heat processing step for heating, after the water washing step, the molding sand to 550℃ to 900℃ inclusive. |
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