一次元ガス流中における銅精鉱粒子の非等温酸化反応　銅精鉱粒子の界面反応速度に及ぼす組成の影響

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タイトル別名
  • Non-isothermal Oxidation of Copper Concentrate Particles Falling in a Vertical Tube. Effect of composition on the interfacial reaction rate of copper concentrate.
  • 1ジゲン ガスリュウチュウ ニ オケル ドウ セイコウ リュウシ ノ ヒ トウ
  • Effect of composition on the interfacial reaction rate of copper concentrate
  • 銅精鉱粒子の界面反応速度に及ぼす組成の影響

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説明

Four kinds of copper concentrate of different compositions were oxidized in N2-O2 gas stream. The dependence of the desulphurization reactions on oxygen partial pressure and wall temperature was examined. X-ray diffraction pattern analysis of the cinders showed that copper concentrate was thermally decomposed, and the FeS formed simultaneously was oxidized to Fe2O4. The non-isothermal oxidation of copper concentrate particles was described using an unreacted core model of copper concentrate covered with an outer product layer of magnetite. The frequency factor k0 of the interfacial reaction rate constant was determined so as to fit the calculated desulphurization curve to the observed curve. It was found that the k0 value significantly decreased with an increase of pO2. Moreover, k0 for CuFeS2 was larger and it decreased with the amount of FeS2 contained in the copper concentrate.

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  • 資源と素材

    資源と素材 107 (8), 531-536, 1991

    一般社団法人 資源・素材学会

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