Thermodynamics of Titanium Oxide in Ladle Slags
Thermodynamics of Titanium Oxide in Ladle Slags
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DOI：
10.2355/isijinternational.41.1447
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发表时间：
2001-12
影响因子：
1.8
通讯作者：
Sung-Mo Jung;R. Fruehan
中科院分区：
文献类型：
--
作者：
Sung-Mo Jung;R. Fruehan
为了控制几种等级钢中的钛含量，有必要了解钢包型炉渣中氧化钛的热力学行为。本文根据Fe-Csat-Ti和CaO-SiO2 - 30%Al2O3-MgO-TiOx渣系与CO平衡时的平衡关系以及Fe-Csat-（16 × 18）%Cr-Si-Ti和CaO-SiO2 - 20%Al2O3-MgO-TiOx渣系与CO平衡时的平衡关系确定了热力学。TiO 15和TiO 2的活度系数分别随碱度的变化范围为0.3 ~ 1.5和0.5 ~ 2.3。通过对Fe-C sat -（16 $> 18）%Cr-Si-Ti合金的实验，发现TiO 1 5和TiO 2的活度系数分别随碱度在0.4 ~ 1.4和0.6 ~ 3.5之间变化。用Fe-Csat-（16 <$18））%Cr-Si-Ti和CaO-SiO2 - 20%Al2O3-MgO-TiOx渣系平衡的结果估算了加硅不锈钢中的钛含量。实验中还使用了与MgO饱和的CaO-SiO2-Al 2 O3-TiOx渣系平衡的Fe-Al-Ti熔体。在这种情况下，炉渣中的大部分钛以TiO 2（Ti 4+）形式存在。利用本研究结果预测了与含钛氧化物的钢包渣平衡的铝镇静钢中的钛含量，预测结果与工厂数据一致。
It is necessary to have information on the thermodynamic behavior of titanium oxide in ladle type slags in order to control the titanium content in several grades of steel. In the present study, the thermodynamics was determined from the equilibrium between Fe-C sat -Ti and CaO-SiO 2 -30%Al 2 O 3 -MgO-TiOx slags in equilibrium with CO and from the equilibrium between Fe-C sat -(16∼18)%Cr-Si-Ti and CaO-SiO 2 -20%Al 2 O 3 -MgO-TiOx slags in equilibrium with CO. From the experiment with Fe-C sat -T alloy, the activity coefficients of TiO 1 5 and TiO 2 vary with basicity from 0.3 to 1.5 and from 0.5 to 2.3, respectively. And from the experiment with Fe-C sat -(16∼18)%Cr-Si-Ti alloy, the activity coefficients of TiO 1 5 and TiO 2 vary with basicity from 0.4 to 1.4 and from 0.6 to 3.5, respectively. The results obtained from the equilibrium between Fe-C sat -(16∼18))%Cr-Si-Ti and CaO-SiO 2 -20%Al 2 O 3 -MgO-TiOx slags were used to estimate the titanium content of silicon-added stainless steel. Experiments were also conducted using Fe-Al-Ti melts in equilibrium with CaO-SiO 2 -Al 2 O 3 -TiO x slags saturated with MgO. In this case most of the titanium in the slag is present as TiO 2 (Ti 4+ ). The present results were used to predict the titanium content of aluminum-killed steel in equilibrium with ladle slags containing titanium oxide and the predictions agreed with plant data.