Magnesium titanate was prepared directly through external coal reduction of seashore titanomagnetite concentrate and magnesium oxide (MgO). The effects of roasting temperature and the type and dosage of reductants on the purity of generated magnesium titanate particles were systematically investigated. Scanning electron microscopy and energy-dispersive spectroscopy analyses were performed to characterize the magnesium titanate particles and observe their purity under different conditions. Results showed that the roasting temperature remarkably influenced the purity of magnesium titanate. At 1200, 1300, and 1400°C, some magnesium ferrite and magnesium aluminate spinel were dissolved in magnesium titanate. However, as the roasting temperature increased to 1500°C, relatively pure magnesium titanate particles were generated because no magnesium ferrite was dissolved in them. The type and dosage of the reductants also remarkably affected the purity of magnesium titanate. The amount of fine metallic iron disseminated in the magnesium titanate particles obviously decreased when lignite was used as a reductant at a dosage of 70wt%. Thus, high-purity magnesium titanate particles formed. At a roasting temperature of 1500°C and with 70wt% lignite, the magnesium titanate product with a yield of 30.63% and an iron content of 3.01wt% was obtained through magnetic separation.

钛酸镁是通过对海岸钛磁铁矿精矿和氧化镁（MgO）进行外部煤还原而直接制备的。系统地研究了焙烧温度，还原剂类型和用量对生成的钛酸镁颗粒纯度的影响。进行扫描电子显微镜和能量分散光谱分析以表征钛酸镁颗粒并观察其在不同条件下的纯度。结果表明，焙烧温度显着影响钛酸镁的纯度。在1200、1300和1400°C，一些铁素体镁和铝酸镁尖晶石溶解在钛酸镁中。但是，随着烘烤温度升高到1500°C，因为没有铁氧体镁溶解在其中，所以生成了相对纯的钛酸镁颗粒。还原剂的类型和剂量也显着影响钛酸镁的纯度。当以70wt％的剂量将褐煤用作还原剂时，钛酸镁颗粒中散布的细金属铁的量明显减少。因此，形成了高纯度的钛酸镁颗粒。在1500℃的焙烧温度下，用70wt％的褐煤，通过磁分离得到钛酸镁产物，其产率为30.63％，铁含量为3.01wt％。当以70wt％的剂量将褐煤用作还原剂时，钛酸镁颗粒中散布的细金属铁的量明显减少。因此，形成了高纯度的钛酸镁颗粒。在1500℃的焙烧温度下，用70wt％的褐煤，通过磁分离得到钛酸镁产物，其产率为30.63％，铁含量为3.01wt％。当以70wt％的剂量将褐煤用作还原剂时，钛酸镁颗粒中散布的细金属铁的量明显减少。因此，形成了高纯度的钛酸镁颗粒。在1500℃的焙烧温度下，用70wt％的褐煤，通过磁分离得到钛酸镁产物，其产率为30.63％，铁含量为3.01wt％。