A copper smelting slag in Chifeng，Inner Mongolia is mainly side blowing-continuous blow⁃

ing slag. After slow cooling，copper mainly exists in the form of copper sulfide，and iron mainly exists in the

form of magnetite and fayalite. In order to determine the key process technology and equipment information

such as process，equipment and product index of the concentrator，the crushing and grinding process includ⁃

ing semi-autogenous grinding is finally determined by comparing the advantages and disadvantages of the

coarse crushing-semi-autogenous grinding-ball milling scheme and the three stage one closed circuit crush⁃

ing-ball milling scheme. By referring to the practice of similar concentrators and the advancement，stability

and operability of the technology，the whole process of the concentrator and the specifications，models and

quantities of the equipment were determined，and the product indicators were designed. The production

practice shows that the key indexes of copper concentrate copper grade，recovery rate and tailings grade of

copper smelting slag beneficiation system are better than the design value. The production capacity and stan⁃

dard have been achieved in an all-round way.

copper smelting slag, copper sulfide ore, magnetite, fayalite, process flow, equipment

selection, design index