经济与质量要求对粘土砂进行再生作者指出：粘土砂造型线上旧砂及废砂用再生系统将变得象熔炼设备那样重要．并认为对粘土砂、树脂砂或粘土一树脂混合砂，用热法或热法一机械再生是唯一既符合美国资源保护与回收法案要求，而又经济的再生工艺．热法再生美国用得多，生产率... Economic and Quality Requirements Recycling Clay Sand The authors note that reclamation of used sand and waste sand on clay modeling lines is as important as melting equipment. It is also believed that the only regenerative process that meets the requirements of the U.S. Resources Conservation and Recovery Act and that is economical to regenerate clay, sand, or clay-resin mixed sand by thermal or thermal mechanical regeneration is the only method. Thermal regeneration of the United States much more, productivity ...