通过对不同原砂进行的反复试验，在国内外水玻璃砂的研究中，首次明确指出，水玻璃砂残留强度曲线的差异，主要是由于原砂烧结点不同而造成的，这可用硅砂粒的受力状况加以解释。从而为生产中选用原砂提供了理论依据。 Through repeated experiments on different original sand, it is clear for the first time in the research of sodium silicate sand at home and abroad that the difference of the residual strength curves of sodium silicate sand is mainly caused by the difference of the sintering points of the original sand, Stress conditions to be explained. Thus providing a theoretical basis for the selection of raw sand in production.