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高碳鐵液中的Al-C-O平衡

Equilibrium of Al-C-O in high-carbon molten iron

  • 摘要: 為了促進鐵水脫硫,在鐵水預處理過程中加Al脫氧,由于鐵水中C含量很高,Al、C同時存在于鐵水中.研究了鐵水中生成Al4C3的判定條件,分析了Al4C3的生成對Al脫氧的影響.利用熱力學方法,計算了aAl4·aC3的值,從而對Al-C-O三相平衡進行了分析,通過得出的aAl4·aC3值繪制了Al-C平衡曲線,并進行了相關討論,以確定Al4C3的生成范圍.

     

    Abstract: In order to promote hot metal desulphurization,Al is used to deoxidize during molten iron pretreatment. Because of the high carbon content of hot metal,Al and C exist in hot metal simultaneously. Determinant conditions of Al4C3 precipitation were investigated and the effect of Al4C3 on aluminum deoxidation was analyzed. The value of aAl4·aC3 product was calculated by using a thermodynamic method and then the equilibrium of Al-C-O was studied. According to the calculated value of aAl4·aC3 product,the Al-C equilibrium curve was plotted and the equilibrium was analyzed to determine the composition range in which Al4C3 can precipitate from hot metal.

     

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