Tetrasodium iminodisuccinate modified phosphate binder and preparation method thereof

The invention discloses a tetrasodium iminodisuccinate modified phosphate binder and a preparation method thereof. The tetrasodium iminodisuccinate modified phosphate binder is prepared from the following raw materials: 52.100% to 52.587% of industrial phosphoric acid, 11.946% to 12.058% of aluminum hydroxide powder, 1.850% to 1.867% of boric acid, 0.617% to 0.622% of silicic acid, 1.233% to 1.245% of light magnesium oxide, 0.039% of copper oxide, 0.467% to 1.387% of tetrasodium iminodisuccinate, and 30.828% to 31.115% of water. According to the invention, tetrasodium iminodisuccinate is adopted as a modifier, the prepared modified phosphate binder has the advantages of low viscosity, high bonding strength and good moisture absorption resistance of a sand sample, and the prepared molding sand has good fluidity. 本发明公开了一种亚氨基二琥珀酸四钠改性的磷酸盐粘结剂及其制备方法，该亚氨基二琥珀酸四钠改性的磷酸盐粘结剂由以下原料制备而成：工业磷酸52.100％～52.587％、氢氧化铝粉末11.946％～12.058％、硼酸1.850％～1.867％、硅酸0.617％～0.622％、轻质氧化镁1.233％～1.245％、氧化铜0.039％、亚氨基二琥珀酸四钠0.467％～1.387％、水30.828％～31.1