Effect of CaO Additive on the Interfacial Reaction Between the BaZrO3 Refractory and Titanium Enrichment Melt

A refractory U–Mo associated ore containing jordisite which enclose U, Mo component, and impede penetration, diffusion process of leaching, oxidation agent was investigated through three approaches of focusing on U, Mo extraction. The results indicate flotation beneficiation without followed metallurgical process is not appropriate because of high target metals loss rate via water leaching. H2SO4, H2O2 dosage recommended to oxidation leaching are 10 and 6–8% of ore mass, and U, Mo leaching rate are 92.71 and 52.16% respectively. For the acid pressure leaching, U, Mo leaching rate 93.75 and 76.07% are achieved under optimal temperature 130–140 °C and H2O2 dosage 8% combined with pressure air 0.6 MPa. Fluidized bed furnace roasting parameters include air flow rate 0.64 m/s, air ore ratio 0.3 m 3/kg at roasting temperature 550 °C with U, Mo leaching rate 93.2 and 89.5%, so enhanced metallurgical process effectively destroy wrapper and increase metal recovery rate.