Yarosh T. Efficiency Increase of Chemical Beneficiation of Manganese-bearing Raw Material on the Basis of Determination of Thermodynamic and Kinetic Regularities of the Process.

Thesis is devoted to the determination of thermodynamic and kinetic regularities of the process of chemical beneficiation of manganese slimes and iron and manganese ores with the object to develop wasteless technologies of raw material processing and to increase efficiency of utilization of manganese-bearing resources. Thermodynamic analysis of the balanced state of multicomponent systems at thermo-chemical processing of manganese products has been carried out. Thermodynamic possibility of turning manganese ore raw material of low-quality into the material non-containing phosphorus at high temperature renewal processes has been determined. Kinetic regularities of carbon-thermal renewal of manganese slimes and sulphating burning out iron and manganese ores which in the range of temperatures of over 700-800 K are described by the equations of three-dimensional diffusion with a spheric symmetry (Jander's equation) have been established. It has been determined that mathematical model which links the kinetic characteristics of leaching processes of burnt out manganese-bearing products at the temperature higher than 335 K is described by the equations of diffusion range, and at the temperature lower than 325 K the process passes to the kinetic range and is limited by the reactions on the dividing boundary of phases (burnt out product| a leaching agent).