Discussion on optimization of crushing and grinding process of copper slag mineral separation

The main crushing and grinding processes of copper slag beneficiation are discussed. The technical characteristics of "Traditional Three-stage Crushing + Ball Milling" and "Crushing + Semi autogenous mill + Ball milling" (SAB) processes are analyzed. "Traditional three-stage crushing + ball milling" system has the advantages of high flexibility, easy grinding control and low operation cost. However, copying the traditional mine crushing technology to crush metallurgical slag has the problems of low efficiency and long process, which is suitable for the beneficiation process with small and medium processing capacity; "Crushing + Semi autogenous mill + Ball milling" (SAB) process has the advantages of simple process, less process links, small floor area and less dust. It has good technical advantages in large-scale beneficiation system. However, as a supporting process of copper smelting, copper slag beneficiation is generally only small and medium-sized. The application in recent years shows that SAB process has some contradictions, such as high operation cost, large investment, large fluctuation in grinding and flotation process, low operation rate of grinding system and so on. Under the background of energy saving and power limiting, such contradictions are becoming increasingly prominent. In view of the above problems, combined with the achievements of special metallurgical slag crushing technology and equipment, and according to the actual industrial practice, this paper discusses the technical scheme of optimizing the copper slag crushing process with the new vibration fine crushing technology as the core, and forms a crushing process suitable for small and medium-sized copper slag beneficiation process with less investment and operation and maintenance cost, flexible configuration and high operation rate of grinding system, which can provide a more suitable basis for the process design of copper slag beneficiation, It has good reference value.