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本文分析了酯硬化水玻璃旧砂再生的特征和我国目前该类旧政再生研究与应用的状况，认为该类旧砂较适合湿法再生。论文较详细地介绍了水玻璃旧砂湿法再生系统组成和主要设备的工作原理，并就“不同的旧砂应该采用不同的再生方法观点”简述了作者的看法。文章最后还就解决目前我国旧砂再生应用和研究中存在的若干问题提出了几点建议。
In this paper, the characteristics of reclaimed old sand of esterified hardened water glass and the status of the research and application of this type of old government regeneration in our country are analyzed. It is considered that the old sand is more suitable for wet regeneration. The paper introduces in more detail the composition of the wet sand regeneration system of water glass and the working principle of the main equipment, and briefly describes the author’s opinion on the point that different old sand should adopt different regeneration methods. Finally, the article also puts forward some suggestions on how to solve some problems existing in the application and research of old sand regeneration in our country.