This work presents a fluid dynamics and kinetics study of the roasting of zinc sulphide concentrates at 950 Celsius Degrees. The data were collected in the literature for experiments carried out in an industrial fluidised bed reactor with an excess of oxygen. The theoretical and experimental characterisation was conducted with the operating variables of the industrial reactor. Theoretical fluid dynamic diagrams (Geldart, Schytill and Grace) were drawn for the industrial practice at certain conditions. It was observed that, with changing temperature, mean particle diameter, gas superficial velocity and reactor size, the boundaries of the diagrams were affected. Mathcad programs to characterise the bed behaviour are presented. The kinetics was studied to evaluate the influences of the following parameters: temperature, O2 partial pressure, particle size, gas and particle densities, and gas viscosity on the conversion of ZnS to ZnO. The results effectively demonstrate that, for the oxygen enrichment employed, the conversions increased in approximately 15 percent. Therefore, the oxygen enrichment is an advisable alternative to increase the efficiency of ZnS concentrates roasting in fluidised bed reactors.