目前自硬砂的应用日益广泛,随之而来的便是再生旧砂以及生产相应的再生设备等问题。为了提高生产效率和经济效果,人们对这些问题进行了研究和探讨。再生设备主要有以下三种工作方式:湿法再生、热法再生和机械再生。使用哪一种要视旧砂所采用的粘结剂的特性而定。比较原始的湿法再生主要适用于水玻璃自硬砂,此法不用来再生不溶于水的有机粘结剂 At present, the application of self-hardening sand is more and more widespread, and the consequent problems are the regeneration of old sand and the production of corresponding regenerating equipment. In order to improve the production efficiency and economic effect, people have carried on the research and the discussion to these questions. Regeneration equipment mainly has the following three kinds of working methods: wet regeneration, thermal regeneration and mechanical regeneration. Which one to use depends on the properties of the binder used. Comparison of the original wet regeneration is mainly applied to water glass self-hardening sand, this method is not used to regenerate the water-insoluble organic binder