Purpose. The research is aimed at improving efficiency of thickening and deslurrying products of iron ore concentration and quality of magnetite concentrate by means of dynamic effects of controlled high-energy ultrasound and the magnetic field impacting ore slurry solids in the output product of the deslimer. Methodology. The research is based on the systemic approach used to define regularities of high-energy ultrasound propagation in heterogeneous media, develop mathematical and simulating models of these processes and methods of improving thickening and deslurrying of iron ore concentrate by combining impacts of the ultrasonic and magnetic fields