| Article | |
|---|---|
| Article name | Efficient method of recycling of finely dispersed man-made wastes of mining and metallurgical production |
| Authors | Lifanov A.. , Makarov V.. , Ugolnikov A.. candidate of technical sciences, assistant professor, ugolnikov@yandex.ruMakarov N.. , |
| Bibliographic description | |
| Category | Earth science |
| DOI | 622.23.05 |
| DOI | 10.21209/2227-9245-2020-26-2-40-49 |
| Article type | |
| Annotation | Numerous studies show that the efficiency of recycling of technogenic or man-made mineral formations (TMF) is limited by high requirements for fractional composition, median sizes and their particles dispersion. Crucial factor constraining the implementation of recycling efficiency of finely dispersed technogenic mineral formations (TMF) is a weak sufficiency of technique and technology and their classification. Strict stratification requirements for the median sizes dispersion of absorbed nanoparticles of a bulk TMF material specify the necessity of the search for the methods and technical means of their implementation, which, under the conditions of probability distribution of physical and mechanical, geometric, kinematic parameters of nanoparticles, can effectively implement them. To ensure high-quality raw materials in the production of materials with unique properties it is necessary to find the technology in which the controlling external influence on the classification process of median size dispersion will be self-similar, i.e. independent of probabilistic characteristics of TMF physical and mechanical properties. The creation of the effective method and technology of hydrovortex classification in a TMF particles fluidized bed and the development of mathematical tools for calculating its geometric and energy characteristics are based on a hypothesis that: in the range of kinetic energy of the translational motion of a liquid droplet ensuring the complete absorption of nanoparticles with maximum diameter of their hydrophobic behavior the inertial forces of nanoparticles motion in the plane of a fluidized bed by an order of magnitude more than the inertial forces in the direction of its motion. Herewith the minimum diameter of totally absorbed nanoparticles depends only on the value of the angular velocity of liquid droplet rotation. A mathematical model of hydrovortex stratification of TMF micro-and nanoparticles has been developed to determine the optimum geometrical parameters and energy characteristics of a hydrovortex Venturi stratifier, its aerator and the position of the receiving hoppers. Equations of the liquid droplet motion under the conditions of unsteady hydrodynamic inertial suprastock motion in the process of stratification in the function of Euler and Reynolds numbers have been obtained. The dependence of the diameter of totally absorbed particles of bulk TMF components on the angular velocity of liquid droplets rotation in the process of hydrovortex classification has been confirmed. The dependence of the relaxation time of liquid droplets with TMF micro- and nanoparticles integrated in them in the process of hydrovortex classification on their median size has been set up. An equation for calculating geometrical parameters of a Venturi stratifier on the required performance and energy characteristics of a hydrovortex aerator has been obtained. The tests of the commercial prototype of a hydrovortex Venturi classifier GKV-280 have been carried out |
| Key words | Recycling; stratification; classification; hydrovortex heterocoagulation; Venturi pipe; Reynolds and Euler numbers; fine technogenic waste; mining and metallurgical production; mineral formations; fine technogenic mineral formations |
| Article information | Makarov V., Ugolnikov A., Makarov N., Lifanov А. Efficient method of recycling of finely dispersed man-made wastes of mining and metallurgical production // Transbaikal State University Journal, 2020, vol. 26, no. 2, pp. 40–49. DOI: 10.21209/2227-9245-2020-26-2-40-49. |
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| Full article | Efficient method of recycling of finely dispersed man-made wastes of mining and metallurgical production |
