About the article
А.E. Sobolev, N.Yu. Starovoytova, V.Yu. Doluda
The kinetics of hydrochemical oxidation of antimonite in solutions of nitric acid was studied using the rotating disk method and the factor experiment design. The adequate kinetic models allowing calculating the specific oxidation rate at any combination of the values of concentration of nitric acid solutions, temperature, disk rotation frequency, and duration of interaction were obtained. The oxidation process is found to proceed in a mixed mode, close to chemically controlled. Gradually, as the sediments of elemental sulfur and Sb2O5 accumulate on the disk surface, the process becomes controlled by internal diffusion. The obtained kinetic characteristics enlarge the database on hydrochemical oxidation kinetics of sulphides and can be used for the elaboration of the recommendations for the effective comprehensive exploitation of antimony-bearing ores and concentrates.
antimonite (antimony(III) sulfide), nitric acid, hydrochemical oxidation, kinetics.