Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
권호 표지

Kinetic Studies on the Non-Isothermal Oxidation of Copper Concentrate Particles

동정광 입자의 비등온 산화반응에 관한 속도론적 연구

Sohn, Ho-Sang
손호상

  • Published : 2002.05.22
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Abstract

The copper concentrate particles were of oxidized in $N_2-O_2$ gas stream. The effect of oxygen partial pressure and wall temperature on the oxidation behavior of copper concentrate were examined. The desulfurization rate was enhanced by the oxygen partial pressure, and the desulfurization occurred markedly in the region of 30 to 60 cm below the top of the reaction tube. On the basis of X-ray diffraction analysis of the cinder, unreacted core model of copper concentrate covered with an outer product layer of boronite and magnetite was applied to the calculation of the progress of non-isothermal oxidation of copper concentrate particles. The frequency factor $k_0$ of the interfacial reaction rate constant was determined so as to fit the calculated desulfurization curve to the observed curve. The calculated particle temperature attained the maximum value in the upper part of reaction tube of 30 to 60 cm below the top of the reaction tube. The maximum particle temperature increased with the oxygen partial pressure.

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