Abstract: In view of the common problems of numerous harmful components and high utilization risks in the process of
copper tailings resource utilization,this paper takes the separated quartz after SiO2 enrichment treatment of copper tailings as
the siliceous raw material to study the mechanism of action of barium carbonate mineralizer on the calcination process of cement
clinker. By adjusting the dosage of barium carbonate (0 to 1. 0%),and combining multiple methods such as flammability test,
XRD phase analysis,microstructure morphology of the mineral phase and firing kinetics calculation,the influence on the mineral
formation and microstructure of clinker was systematically evaluated. The results showed that the introduction of barium carbonate
can significantly reduce the apparent activation energy for the formation of C3S,from 199. 04 kJ/ mol of the reference
sample to 104. 06 kJ/ mol at a dosage of 0. 8%,effectively improving the combustibility and reaction rate of raw materials. Ba2+
can partially replace Ca2+ in clinker minerals,which belongs to the isomorphic phenomenon. It helps regulate the structure of
the silicon-oxygen network and induce the good development of C3S crystals,improving the morphology and structural compactness
of minerals. In addition,the introduction of barium carbonate alleviates the defects of high crystallinity and weak reactivity
of the separated quartz obtained from the treatment of copper tailings,providing a feasible path for the large-scale and high-value
utilization of copper tailings.

Key words: siliceous raw material,barium salt,mineralizer,mineralization mechanism