*3.3. Contribution Ratio of the Respective Titanium Distribution Ratio Based on the IMCT*

In addition to the total titanium distribution ratio of LF refining slags predicted by the established IMCT model, the respective titanium distribution ratio in the present slag system also can be determined. In order to expound the titanium distribution behavior in the LF process, the respective titanium distribution ratios of TiO2, CaO·TiO2, MgO·TiO2, FeO·TiO2, and MnO·TiO2 in the slags can be acquired by the built IMCT model, respectively, and correlations between the quantitative titanium distribution ratio *L*Ti,*i*,cal of the five structural units and the *L*Ti,cal is described in Figure 6. It is evident that *L*Ti,*i*,cal had a nice linear relationship with *L*Ti,cal, and the respective contribution rates of the structural units containing TiO2 to total titanium distribution ratios in the slags can be defined by the fitted line gradient.

**Figure 6.** Correlation between the respective titanium distribution ratio and the total titanium distribution ratio of the slags, the solid line of color red, black, blue, magenta, and cyan represent the contribution ratio of CaO·TiO2, TiO2, FeO·TiO2, MgO·TiO2, and MnO·TiO2, respectively.

The regression relationships between *L*Ti,*i*,cal and *L*Ti,cal for de-titanium products in the slags are listed in Table 5. Table 5 shows that the contribution rates of the five structural units to the predicted *L*Ti,cal by the IMCT model were approximately 9.97%, 84.96%, 2.03%, 2.65%, and 0.39%, respectively. It can be concluded from the acquired industrial results that the constitutional unit CaO plays a pivotal role in CaO–SiO2–Al2O3–MgO–FeO–MnO–TiO2 slags in the de-titanium process.

**Table 5.** Linear regression expression of *L*Ti,*i*,cal against *L*Ti,cal for the structural units containing TiO2 and their average contribution rates to *L*Ti,cal based on IMCT.

