Tailings are “waste” discharged by mining companies under certain technical and economic conditions, but at the same time they are potential secondary resources. When technical and economic conditions permit, they can be effectively developed again. What equipment is needed to make sand from tailings The waste rock chips from different sources have different lithologies, different mining and crushing processes, and have very different physical properties. At present, there is insufficient systematic research on the performance of rock chips, and the law of the quality of rock chips and their impact on concrete performance is mastered. insufficient. The low-quality stone chips have large powder content, rough surface, sharp edges and corners, difficult mud removal and shaping technology, and large investment; the problem of mud removal and shaping is not solved, and it is not conducive to the convenience of concrete, increasing the amount of cement, poor market acceptance. ...