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Vol.45, No.6, 368 ~ 377, 2007
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| Title |
| Smelting & Behavior ; Reduction Behavior of Carbon Composite EAF Dust and Mill Scale Briquettes |
| 김동식 Dong Sik Kim , 유병돈 Byung Don You , 최회진 Hoe Jin Choi , 위창현 Chang Hyun Wi , 김승묵 Seung Muk Kim , 윤광원 Kwang Won Yun |
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| Abstract |
| The reduction behaviour of carbon composite briquettes of steelmaking by-products containing iron oxide, EAF(electric arc furnace) dust and mill scale, was investigated within the temperature range 1,000℃ to 1,550℃. The reduction degree of the briquettes depending on the reaction time was evaluated by means of the off-gas analysis. The reduction degree of EAF dust was higher than that of mill scale at low temperature not exceeding 1,250℃. But EAF dust and mill scale showed similar reduction behaviour at elevated temperature above 1,250℃. The rate constants of the reduction reaction of EAF dust and mill scale briquettes were determined for the initial stage of the reaction at which the rate is determined by the chemical reaction. Arrhenius plot of the reaction rate constants with the reciprocal absolute temperature showed discontinuities at temperature of 1,238.1℃ and 1,279.3℃ for EAF dust and mill scale briquette, respectively. The rate equations of the reduction reaction agreed well with experimental values. |
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| Key Words |
| EAF dust, Mill scale, Carbon composite briquette, Reduction degree, Reduction rate, Activation energy |
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