Abstract:With the development of society, the demand for tellurium is increasing, and the exploitation and utilization of low-grade Dashuigou tellurite deposit has attracted more and more attention. Oxalic acid was used to dissolve Dashuigou tellurium deposit under atmospheric pressure. The results show that the dissolution amounts of Fe, Mg, Ca, Al and Si is 662, 187, 610, 686 and 64 mg/L, respectively under the conditions of oxalic acid concentration of 0.25 mol/L, liquid-solid ratio of 15︰1 and reaction time of 15 d. Te is enriched in filter slag. The sequence of dissolution of mineral phases is dolomite, pyrrhotite and tetradymite. The binding mode and electron transfer mechanism between oxalic acid and dolomite, pyrrhotite and tetradymite were calculated and simulated. The results show that oxalic acid is adsorbed on the surface of mineral through the acid hydrolysis of hydrogen atom and the complexation of oxygen atom, and the electron transfer from oxalic acid to the surface of dolomite, while the opposite is true for pyrrhotite and tetradymite.