ABSTRACT

Titanium distribution ratio is a key parameter which directly reflect the ability to remove titanium in the LF refining process. A thermodynamic model for calculating the titanium distribution ratio (LTi) between ladle furnace (LF) refining slags, i.e., CaO–SiO₂–MgO–FeO–(CaF2)–MnO–Al₂O₃–TiO₂ slags, and molten steel has been developed by coupling with the ion and molecule coexistence theory (IMCT) and slag–metal equilibrium theory. The reliability of the model was verified by comparing it with industrial data. Using this model, the effects of Al, Si content in steel and CaO, MgO and TiO₂ in slag on the L_Ti were investigated. Meanwhile, the optimal equilibrium slag composition of GCr15SiMn bearing steel was predicted. On this basis, five groups of industrial tests were carried out, and the results indicated that the optimized practice had achieved remarkable results in limiting titanium content compared with the routine process.

摘要

钛分布比是直接反映LF精炼过程中除钛能力的关键参数。计算钢包炉(LF)精炼渣CaO-SiO ₂ -MgO-FeO-(CaF2)-MnO-Al ₂ O ₃ -TiO ₂渣与钢水之间钛分布比(LTi)的热力学模型通过与离子和分子共存理论（IMCT）和渣-金属平衡理论相结合发展起来。通过与工业数据的比较验证了模型的可靠性。利用该模型，研究了钢中 Al、Si 含量和渣中 CaO、MgO 和 TiO ₂对L _{Ti的影响。}进行了调查。同时，预测了GCr15SiMn轴承钢的最佳平衡渣成分。在此基础上进行了五组工业试验，结果表明，优化实践与常规工艺相比，在限制钛含量方面取得了显着效果。