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Metals 2016, 6(5), 105; doi:10.3390/met6050105

Oxidation Kinetics and Oxygen Capacity of Ti-Bearing Blast Furnace Slag under Dynamic Oxidation Conditions

1
School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China
2
School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110168, China
3
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
*
Author to whom correspondence should be addressed.
Academic Editor: Corby G. Anderson
Received: 23 December 2015 / Revised: 20 April 2016 / Accepted: 21 April 2016 / Published: 6 May 2016
(This article belongs to the Special Issue Recycling of Metals)
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Abstract

The oxidation kinetics of low valence titanium and iron in Ti-bearing blast furnace slag were investigated, the activation energies were calculated, which are 461.1 and 437.3 kJ/mol, respectively. The results illustrate that the oxidation process of Ti3+ in the slag is controlled by chemical reactions. However, the chemical reaction between oxygen and iron, between slag and gas, is the determining step of the iron oxidation process. The effects of the isothermal oxidation on the content of Fe2O3, FeM, FeO, and FeT in the slag are discussed. The Fe2+ and Ti3+ in the molten slag were oxidized at high temperatures. Oxygen affinity of the slag can be described using oxygen capacity. The oxygen capacity of Ti-bearing blast furnace slag was investigated during the dynamic oxidation process, the results indicates that the oxygen capacity of the slag decreased with increasing oxidation time during the dynamic oxidation process. View Full-Text
Keywords: Ti-bearing blast furnace slag; dynamic oxidation; kinetics; oxygen capacity Ti-bearing blast furnace slag; dynamic oxidation; kinetics; oxygen capacity
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Zhang, L.; Zhang, W.; Zhang, J.; Li, G. Oxidation Kinetics and Oxygen Capacity of Ti-Bearing Blast Furnace Slag under Dynamic Oxidation Conditions. Metals 2016, 6, 105.

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