Article
Article name A promising method of high-pressure hydro-dusting efficiency increasing
Authors Makarov N.. ,
Potapov V.. ,
Gorshkova E.. ,
Makarov V.N. ,
Bibliographic description
Category Earth science
DOI 621.982.622.273, 622.44
DOI 10.21209/2227-­9245-­2018-­24-­5-13-20
Article type Scientific
Annotation A promising method for increasing the efficiency of high-pressure hydro-dusting is considered. Analysis of existing methods of hydro-dusting has showed their inadequate efficiency of ensuring sanitary and hygienic conditions in mining enterprises. It has been established that with high-pressure hydro-dusting, energy consumption for aeration is significantly increased, which reduces the energy efficiency of sanitary-hygienic conditions in mines and, as a result, leads to a drop in the competitiveness of environmental technology in mining. A method of vortex high-pressure hydro-dusting based on the principle of vortex inertial orthokinetic hetero-coagulation in the system “liquid-solid” is proposed. A mathematical model of vortex hydro-dusting is proposed; a significant reduction in the amount of energy required for the complete absorption of absolutely hydrophobic dust particles by liquid droplets is observed when the liquid droplets are rapidly curled. The graphic model of interaction in the contact zone at the moment of collision in the “solid-liquid” system is specified, it is established that the contact area of the liquid drop with the dust particle has a direct effect on the value of the contact angle of wetting. Equations for calculating the values of the Stokes and Reynolds criteria under conditions of vortex inertial orthokinetic hetero-coagulation are obtained. An equation is obtained for calculating the value of the decrease in the energy required for the total absorption of dust particles as a function of the angular velocity of rotation of liquid droplets. A significant increase in the wetting surface and contact angle of wetting under conditions of vortex kinematic coagulation is proved. Equations for calculating the effective wetting contact angle and the minimum diameter of the dust particles to be absorbed as a function of the angular velocity of liquid droplet rotation are obtained. A significant reduction in the median size of the dispersed composition of dust particles, an increase in the effectiveness of dust suppression, and a reduction in the flow rate of water under vortex hydrodeposition conditions have been demonstrated. It was found that the decrease in energy barriers in the conditions of vortex coagulation is due to an increase in the values of the Stokes and Reynolds criteria, with the rotation of the liquid droplet in comparison with their values calculated without taking into account the rotation of the liquid drop
Key words hydrodispersing; vortex inertial orthokinetic hetero-coagulation; hydrophobicity; wetting contact angle; kinematic coagulation; Stokes criterion; angular velocity; energy barrier; high-pressure hydrodeposition; mined coal
Article information Makarov V., Makarov N., Potapov V., Gorshkova E. A promising method of high-pressure hydro-dusting efficiency increasing // Transbaikal State University Journal, 2018, vol. 24, no. 5, pp. 13-20
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Full articleA promising method of high-pressure hydro-dusting efficiency increasing