The paper presents the conversion process from titanium slag to rutile TiO₂ through adopting the process route in the order of “Alkali leaching-Microwave roasting-Acid leaching-Microwave calcination”. The transformations of the slag samples in terms of phase composition, molecular structure, and other changes before and after the process were observed through analytical technics such as XRD, Raman, FI-IR and SEM. The characterization results all showed that the series of process treatment not only converted the phase of high-titanium slag from the black rock into rutile TiO₂, but also significantly reduced impurities, with the improved rutile TiO₂ grade meets the production standards of titanium dioxide using the chlorination process. The work highlights that the combined process of microwave heating and acid-alkali joint leaching is a potential and productive approach for preparing artificial rutile TiO₂ from titanium slag.

采用“碱浸-微波焙烧-酸浸-微波煅烧”的工艺路线，介绍了钛渣向金红石TiO ₂的转化过程。通过XRD、Raman、FI-IR、SEM等分析技术，观察了炉渣样品在加工前后的相组成、分子结构等变化。表征结果均表明，该系列工艺处理不仅使黑色岩石中的高钛渣相转变为金红石TiO ₂，而且杂质显着减少，改进后的金红石TiO ₂等级符合氯化法钛白粉生产标准。该工作强调，微波加热和酸碱联合浸出的联合工艺是一种从钛渣制备人造金红石TiO ₂的潜在且富有成效的方法。