Kinetics of Calcium Ferrite Formation at Initial Stage of Reaction in CaO-Fe2O3 Mixed Bed
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摘要: 從理論上導出了CaO-Fe2O3混合層內反應初期鐵酸鈣生成的動力學模型:
1-k1(1-k2BRv)2/3-k2(1+k1BRv)2/3=(2k1Mf/ρfrf2)·DcΔCt。
其中k1=(ρf-ρcf)/(ρf-ρc),k2=(ρcf-ρc)/(ρf-ρc),B=1+Mcρfm/Mfρc。經1160℃和1190℃下的基礎實驗表明,模型與實驗數據吻合很好,同時得到該兩溫度水平下氧化鈣在鐵酸一鈣有效擴散系數分別為4.34×10-9cm/s和2.32×10-8cm/s。Abstract: Kinetical model of calcium ferrite formation at initial stage of reaction in CaO-Fe2O3 mixed bed was obtained by using terms of theory as follows:
1-k1(1-k2BRv)2/3-k2(1+k1BRv)2/3=(2k1Mf/ρfrf2)·DcΔCt.br/>其中k1=(ρf-ρcf)/(ρf-ρc),k2=(ρcf-ρc)/(ρf-ρc),B=1+Mcρfm/Mfρc. The results calculated by this model is identical very well with the experimental data, and the interdif-fusion coefficients of CaO in monocalcium ferrite were determined as 4.34×10-9cm2/s and 2.32×10-8cm2/s respectively at 1160 and 1190℃.-
Key words:
- mixed bed /
- formation /
- kinetics/calcium ferrite
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