A high-fluidity and preparation method silicate sand having

Object of the present invention is to provide a high flowability silicate sand having its preparation method, which is characterized in that: the water glass modulus is 2.2 to 2.8, the preparation of sodium silicate was added in 1% to 10% water glass (wt%) of an alkali metal inorganic substance and 5% ~ 15% (wt%) of the amorphous phosphate. The present invention is added to improve the fluidity of the fluidity promoting agent silicate sand through the sand and the modified sodium silicate, the silicate sand so as to solve the problem of poor fluidity, the application and development of the green cast silicate sand having great significance.