FORMATION OF THE STRUCTURE OF IRON ORE PELLETS PRODUCED USING HEAT-SPRAYING OF WET CHARGE
https://doi.org/10.17073/0368-0797-2016-12-857-863
Abstract
The article describes the possibilities of formation of iron ore pellets structure with regulated distribution of the porosity along the pellets cross section, obtained using heat-spraying of wet charge. With the help of the video and analysis of the macrostructure of sprayed charge layer, which is a matrix for germinal centers, the author gives the description of formation mechanism of the sprayed charge layer and the growth of its geometrical dimensions. The formation of the sprayed charge layer starts with the formation and growth of spraying focus. The formation mechanism of pellets porosity relies on shifting deformation of charge due to existence of friction forces between the air stream and the surface of the sprayed layer. It was found that the heat-spraying of wet charge on the charge skull forms a sprayed layer with an increased proportion of open pores along the cross-section.
The value of the open porosity of the sprayed layer depends on the distance to the sprayed surface and the point on surface of the charge scull pelletizer, in which the spaying is organized. The distribution of open and closed pores in the volume of pellets, depending on the mass fraction of the germinal centers, was obtained by the heat-spraying of wet charge.
About the Author
V. M. Pavlovets
Siberian State Industrial University
Russian Federation
Cand. Sci. (Eng.), Assist. Professor of the Chair “Thermal Power and Ecology”
Russian Federation
Cand. Sci. (Eng.), Assist. Professor of the Chair “Thermal Power and Ecology”
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Review
For citations:
Pavlovets V.M. FORMATION OF THE STRUCTURE OF IRON ORE PELLETS PRODUCED USING HEAT-SPRAYING OF WET CHARGE. Izvestiya. Ferrous Metallurgy. 2016;59(12):857-863. (In Russ.) https://doi.org/10.17073/0368-0797-2016-12-857-863
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