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酯硬化水玻璃砂干法再生前必须进行加热烘干。试验表明，加热烘干的最佳温度为３００～３５０℃。再生砂的循环使用会使再生砂的溃散性变差，本文对再生砂溃散性变坏的原因及防止措施进行了分析。
Ester-hardened sodium silicate sand must be heated and dried before it can be regenerated. Experiments show that the best heating and drying temperature is 300 ~ 350 ℃. Recycled sand recycling will make the collapse of reclaimed sand worse, this paper on the reasons for the collapse of reclaimed sand and prevention measures were analyzed.