Abstract: In order to fully understand the properties of a molybdenum tailings roughing copper con⁃ centrate in Inner Mongolia and formulate a reasonable beneficiation process for subsequent copper recovery， chemical multi-element analysis，MLA and other technologies are used to study the mineral element compo⁃ sition，mineral phase，disseminated particle size，main mineral monomer dissociation degree and the rela⁃ tionship with other minerals.The results show that the sulfur content in the mineral is 36.20%，and the cop⁃ per content is 1.74%. Copper is mainly distributed in the sulfide phase，mainly in the form of chalcocite and chalcopyrite. The main copper minerals are fine in grain size，in which the content of -75 μm in chalcocite is 88.65%，and the content of -75 μm in chalcopyrite is 61.01%.The monomer content of the main copper minerals is low，of which the content of chalcocite monomer is 27.80%，and the content of chalcopyrite monomer is 12.90%. The analysis results of raw ore properties show that the key factors affecting copper re⁃ covery are the fine disseminated particle size of copper minerals and their complex association with pyrite. Subsequent separation can improve copper recovery by fine grinding.

Key words: roughing copper concentrate, monomer dissociation degree, elemental analysis, process mineralogy