Heating Behavior of Blast Furnace Slag Bearing High TiO<sub>2</sub> Under Microwave Irradiation

Chen Yan; Bai Chenguang; He Yizhu; Noboru YOSHIKAWA; Shoji TANIGUCHI

Volume 27 Issue 1

Jan. 2006

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Article Navigation > IRON STEEL VANADIUM TITANIUM > 2006 > 27(1): 12-16,20

Chen Yan, Bai Chenguang, He Yizhu, Noboru YOSHIKAWA, Shoji TANIGUCHI. Heating Behavior of Blast Furnace Slag Bearing High TiO2 Under Microwave Irradiation[J]. IRON STEEL VANADIUM TITANIUM, 2006, 27(1): 12-16,20.

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Chen Yan, Bai Chenguang, He Yizhu, Noboru YOSHIKAWA, Shoji TANIGUCHI. Heating Behavior of Blast Furnace Slag Bearing High TiO₂ Under Microwave Irradiation[J]. IRON STEEL VANADIUM TITANIUM, 2006, 27(1): 12-16,20.

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Heating Behavior of Blast Furnace Slag Bearing High TiO₂ Under Microwave Irradiation

1. School of Materials Science & Engineering, Anhui Univ. of Techology, Ma'anshan 243002, Anhui, China;
2. School of Materials Science & Engineering, Chongqing Univ., Chongqing 400044, China;
3. Graduate School of Engineer, Tohoku Univ., Sendai Japan

Received Date: 2005-11-03
Available Online: 2023-12-06

Abstract

Abstract

The blast furnace（BF） slag bearing high TiO₂ was processed under microwave irradiation in order to induce micro-cracks in it and to improve the grindability of the slag.During inducing crack in the slag,it was found that the slag could be effectively heated by microwave,and thermal runaway was occurred.In order to investigate the mechanism for effectively heating of the slag and the reason of occurring thermal runaway in the slag irradiated under microwave field,different kind of synthesized slag was heated in microwave field.Experimental results showed that the existence of CaTiO₃ played a key role in heating of the slag under microwave irradiation.The permittivity of CaTiO₃ was measured with Network Analyzer.It was determined that the permittivity of CaTiO₃ was higher than general material,which quantitatively explained the role of CaTiO₃ on heating of the BF slag bearing high TiO₂ irradiated under microwave field.Furthermore,the permittivity of CaTiO₃ increased with the temperature rising,which resulted in the heating way of positive feedback.The heating way of positive feedback was one of the main reasons for the occurrence of thermal runaway in the BF slag bearing high TiO₂.
- microwave,
- BF slag bearing high TiO₂,
- thermal runaway,
- perovskite,
- permittivity

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