DETERMINATION OF KINETIC-PARAMETERS FOR THE REOXIDATION OF DIRECT REDUCED IRON UNDER RISING TEMPERATURE CONDITIONS

Authors
BANDOPADHYAY A GANGULY A PRASAD KK SARKAR SB RAY HS
Citation
A. Bandopadhyay et al., DETERMINATION OF KINETIC-PARAMETERS FOR THE REOXIDATION OF DIRECT REDUCED IRON UNDER RISING TEMPERATURE CONDITIONS, Thermochimica acta, 228, 1993, pp. 271-281
Citations number
11
Categorie Soggetti
Chemistry Analytical
Journal title
Thermochimica acta → ACNP
ISSN journal
00406031
Volume
228
Year of publication
1993
Pages
271 - 281
Database
ISI
SICI code
0040-6031(1993)228:<271:DOKFTR>2.0.ZU;2-2
Abstract
This paper presents the main kinetic parameters for the reoxidation of direct reduced iron (DRI) samples in air under non-isothermal conditi ons and compares the data with isothermal kinetic parameters for a typ ical DRI sample. It is found that the non-isothermal activation energy (DELTAE) values are less than the isothermal DELTAE values. For coal based DRI, the non-isothermal DELTAE values lie in the range 20-35 kJ mol-1. For gas based DRI the value is much higher, about 55 kJ mol-1. For the reoxidation of DRI, the kinetic compensation effect (KCE) has been found to be valid.