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为研究铁水中钛元素碳热还原反应规律,提供高炉护炉理论依据,利用高温熔炼、急速淬火、化学分析以及热力学模型计算等方法,在实验室条件下利用分析纯试剂研究在1350~1600°C间钛在低钛渣系CaO-SiO2-MgO-Al2O3-TiO2与铁水间的分配行为。研究结果表明,随着反应温度的增加,钛的分配比L(Ti)增加,但系统活度系数γsys降低,从而导致反应平衡常数升高。结合Wagner与凝聚电子相模型,通过对实验数据进行拟合,得到钛碳热还原反应的吉布斯自由能公式。最后,结合实验所得结果,给出了高炉铁水中w(Si)与w(Ti)含量的关系以及可以达到护炉效果的最小入炉钛负荷。
In order to study the law of carbothermic reduction reaction of titanium in hot metal, the theoretical basis of blast furnace protection is provided. Based on the theory of high temperature melting, rapid quenching, chemical analysis and thermodynamic model calculation, using analytical reagent under laboratory conditions, Partitioning Behavior of Intermetallic Titanium between CaO-SiO2-MgO-Al2O3-TiO2 Low-Slag Slag and Hot Metal. The results show that with the increase of reaction temperature, the titanium distribution ratio L (Ti) increases, but the activity coefficient γsys decreases, which leads to the increase of reaction equilibrium constant. Combining the Wagner and condensed-phase model, the Gibbs free energy formula of titanium carbothermal reduction was obtained by fitting the experimental data. Finally, the relationship between w (Si) and w (Ti) content in blast furnace hot metal and the minimum furnace load of titanium which can reach the effect of furnace protection are given based on the experimental results.