一、概述旧砂再生有干法、湿法和热法三种类型。湿法再生用水量多。占地面积大,水洗后再生砂要进行干燥,还有污泥污水的处理较困难,因此多用于水力清砂等湿法清理的旧砂再生。热法再生主要用于有机粘结剂的砂种,如树脂砂等。但耗能多,投资大,占地面积大,故多用于较难处理 First, an overview of the old sand regeneration dry, wet and hot three types. Wet regeneration of water and more. Large area, recycled sand after washing to be dried, as well as sludge treatment of sewage more difficult, it is used for hydraulic sand cleaning and other wet sand regeneration. Thermal regeneration is mainly used for organic binder sand, such as resin sand and so on. However, energy consumption, large investment, covers an area of ​​?? large, so for more difficult to deal with