TiC颗粒对CaO-SiO_2-MgO-Al_2O_3-TiO_2炉渣电导率的影响

采用交流阻抗谱法测定了含有不同的TiC颗粒含量和粒度的CaO SiO2 MgO Al2O3 TiO2拟五元炉渣在1633K时的表观电导率·根据炉渣的交流阻抗谱,提出了合理的等效电路;根据表观电导率随温度变化的关系,估算了1633～1693K温度范围内TiC含量和粒度不同的炉渣的表观活化能·结果表明:炉渣体系的表观活化能随TiC颗粒的含量增高及粒度减小而增大,而对TiC质量分数为0 5%的炉渣其表观活化能随TiC颗粒粒度减小而稍有减小;在1633K时,炉渣体系的表观电导率随TiC颗粒的含量增高及粒度减小而减小,而对TiC质量分数为0 5%的炉渣其表观电导率随TiC颗粒粒度减小而稍有增大;在163...

Effect of TiC Particles on Conductivity of CaO-SiO2-MgO-Al2O3-TiO2 Quasi-Quinary Slag

The apparent conductivities of the slag CaO-SiO2-MgO-Al2O3-TiO2 containing TiC particles of different sizes and concentrations were measured by A.C. impedance spectrum technique at 1633 K. An equivalent circuit was proposed rationally to simulate the A.C. impedance spectra of the slag, and the apparent activation energies of the slag were estimated from the relationships between the apparent conductivities and the temperature at the range of 1633-1693 K. The results indicated that the apparent activation energy of the slag would increase with increasing content of TiC particles and decreasing particle size. When the mass fraction of TiC is 0.5%, the apparent activation energy would decrease slightly with decreasing TiC particle size. The apparent conductivity of the slag would decrease with increasing TiC content and decreasing TiC particle size at 1633 K. When the mass fraction of TiC is 0.5%, the apparent conductivity of the slag would increase slightly with TiC particle size. In sum, the relationship between the apparent conductivity and temperature of the slags of the same TiC content and particle size at the temperature range 1633-1693 K is in conformity with Arrhenius relationship.