In the dissertation work the scientific bases of process of mixing of charge materials with application of the improved technical system "the rotary mixer-conveyor" are considered. It is established that for the experimental technical system "rotary mixer-conveyor", with constant design and kinematic parameters of the conveyor belt, the quality of mixing is directly proportional to the height of the material layer.
Based on the analysis of common technological schemes of preparation of charge materials for sintering and firing; characteristics of designs of continuous mixers used for preparation of coal charge; performed research work aimed at studying and modeling the mixing of materials, it is established that the existing foreign analogues of continuous mixers meet the requirements of domestic technology for the production of high-quality mixture of coal charge, but require significant capital investment; the currently used method of preparation of charge materials does not meet the technological requirements for the quality of the mixture; one of the possible ways to improve the quality of mixing of the metallurgical charge can be used technical system "mixer-conveyor" with a vibrating effect on the conveyor belt; to create an efficient mixing device that meets the technological requirements for the production of coal charge, the prototype can be a technical solution based on the principle of operation of a rotary mixer of continuous action with a flexible cable rotor; to date, there are no works on the calculation of power, design parameters that describe the movements of material particles on the rotor blades, which rotate in a layer of bulk medium towards each other, taking into account the additional vibration pulse.
In the course of theoretical studies of power and design parameters in the technological processes of the rotary mixer the following results were obtained: developed a method of calculation to determine the power parameters of the technical system "rotary mixer-conveyor" of continuous action with cable elements of the rotor. for a horizontally directed mixer with cable elements of the rotor, which bring the material layer into a suspended state, a mathematical model is obtained, which describes the influence of design and mode parameters on the nature of the motion of material particles in a fluidized medium. It is established that the nature of the motion of particles moving together with the conveyor belt can be considered certain; the profile of the rotor blade of the rotor mixer is constructed, which carries out the introduction into the array of material with the least losses and with the least wear of the blades; an analytical dependence is obtained, which describes the influence of constructive, regime parameters on the nature of the motion of material particles after rising from the blades of the rotor, which rotates uniformly, in the horizontal plane of the pseudo-viscous medium.
An improved technical system "rotary mixer-conveyor" has been developed and patented.
Based on the results of research and for their practical use developed: "Methodology for determining the energy needs spent on mixing material", "Methodology for calculating the eccentric support of the belt conveyor", "Methodology for determining the profile of rotary mixer blades", "Methodology for determining the interaction of bulk material with the surface of the profile blade during its rotational removal from the general array" and "Methods for determining the scattering zone of particles", which are implemented in the practice of research, design and engineering work "KVMSH-Plus", as well as in the educational process of the State University economics and technology.
