COMPARATIVE EVALUATION OF THERMAL STRESSES IN THE CAPACITY OF IRON-ORE PELLETS WITH DIFFERENTIATED POROSITY
https://doi.org/10.17073/0368-0797-2016-8-536-542
Abstract
The article presents the comparative evaluation of thermal stresses in the capacity of iron-ore pellets with diff erentiated porosity. Thermostressed state of pellets, derived from the use of thermal power wet charge heat-spraying technology for charge skull and palletized materials has been analyzed. The infl uence of porosity, thermal pellets massiveness on the magnitude and nature of the thermal stresses changes along the cross section of the pellets has been set. The authors have evaluated the nature of changes in the strength of the pellets with diff erentiated porosity along its cross section, with the dynamics of the temperature fi eld of the porous spheres and criteria of massive heat in the nucleus and pellet shells. The analysis of the role of thermal stress to activate the sintering of iron-ore pellets has been conducted to propose recommendations for improving the thermal conditions of pellets burning. On the basis of this analysis the authors have concluded that a more favorable pore structure of pellets is produced by forced nucleation technology, in the capacity of which the nucleus with high porosity is formed.
About the Authors
V. M. Pavlovets
Siberian State Industrial University, Novokuznetsk, Russia
Russian Federation
Russian Federation
Cand. Sci. (Eng.), Assist. Professor of the Chair “Thermal Power and Ecology”
A. V. Gerasimuk
Siberian State Industrial University, Novokuznetsk, Russia
Russian Federation
Russian Federation
Postgraduate of the Chair of Electrical Engineering
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Review
For citations:
Pavlovets V.M., Gerasimuk A.V. COMPARATIVE EVALUATION OF THERMAL STRESSES IN THE CAPACITY OF IRON-ORE PELLETS WITH DIFFERENTIATED POROSITY. Izvestiya. Ferrous Metallurgy. 2016;59(8):536-542. (In Russ.) https://doi.org/10.17073/0368-0797-2016-8-536-542
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