Effect of Slag Compositions on [Al] Contents in LF Process

WANG Yong,DUAN Hong-tao,WANG Li-feng,WEI Wei,YANG Ling-li

Journal of Iron and Steel Research ›› 2013, Vol. 25 ›› Issue (03) : 18-22.

Journal of Iron and Steel Research ›› 2013, Vol. 25 ›› Issue (03) : 18-22.
Smelting and Working

Effect of Slag Compositions on [Al] Contents in LF Process

  • WANG Yong1,DUAN Hong-tao2,WANG Li-feng1,WEI Wei3,YANG Ling-li4
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Abstract

According to the coexistence theory of slag structure, mass action concentrations for CaO-MgO-MnO-FeO-SiO2-Al2O3 slag were calculated. Based on the practical data, a mathematical model of oxidation-reduction of [Al] under some slag conditions in LF refining process was built. The influence factors about [Al] contents with different slag compositions were calculated. The results show that the [Al] contents can be controlled by w[Si] and w(FeO). The refining slag of lower basicity and w(Al2O3) is advantageous to control [Al] contents, and it should be controlled under 6×10-6 when the refining slag basicity is 0. 9 and w(Al2O3) within 3%. The [Al] contents would be reduced when w(FeO) is appropriately raised.

Key words

LF process / refining slag / [Al] content / thermodynamics

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WANG Yong,DUAN Hong-tao,WANG Li-feng,WEI Wei,YANG Ling-li. Effect of Slag Compositions on [Al] Contents in LF Process[J]. Journal of Iron and Steel Research, 2013, 25(03): 18-22

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