Abstract: Taking a porphyry copper ore dressing plant as the research object，the existing tradition‐ al crushing and grinding process of "three stages and one closed circuit crushing + one stage grinding" is analyzed，and the feasibility of the application of "semi-autogenous grinding + ball milling + stone crush‐ ing（SABC）" process in the plant is discussed. The technical advantages of SABC process in grinding effi‐ ciency，energy consumption cost and automation level are systematically expounded. Combined with the ore properties（high hardness）and existing production capacity（9 million t/a），the process design and core equipment selection are studied. Through a comprehensive comparison of the two processes in terms of investment，operation，adaptability，and environmental protection，it is pointed out that the SABC pro‐ cess has outstanding advantages such as simplified process，energy saving and consumption reduction， and environmental friendliness，but there are also challenges such as high initial investment and sensitivity to ore properties. The research shows that the mine has the basic conditions for the application of SABC process in terms of ore hardness and production scale，but it is necessary to further carry out ore grindabili‐ ty test and economic evaluation to ensure the rationality and feasibility of the technical route.

Key words: semi-autogenous grinding process, grinding efficiency, cone crusher