施工中的混凝土搅拌机（站、楼、车），每天清洗粘着于机上的残余混凝土时，都会浪费大量砂、石，同时产生大量清洗污水，造成环境污染。在美国、德国、日本和意大利等工业发达国家，已经研制出多种渣料回收装置和废水处理设备，取得了显著的经济效益和社会效益。 渣料回收装置 The concrete mixers (stations, buildings, and vehicles) under construction will waste a lot of sand and stone every day when cleaning the residual concrete stuck on the machine, and produce a large amount of cleaning sewage at the same time, causing environmental pollution. In industrialized countries such as the United States, Germany, Japan, and Italy, a variety of slag material recovery devices and wastewater treatment equipment have been developed, and remarkable economic and social benefits have been achieved. Slag recovery device