Formation and Mechanism of Magnesium Titanate in the Process of Ilmenite Reduction. (3rd April 2021)

• Record Type: Journal Article
• Authors: Chen, Chao; Sun, Tichang; Geng, Chao; Kou, Jue; Liu, Jianguo
• Is Part Of: Mineral processing and extractive metallurgy review. Volume 42:Number 3(2021)
• Page Start: 162
• Page End: 171
• Publication Date: 2021-04-03
• Subjects: Ilmenite -- magnesium titanate -- carbonthermic reduction -- formation process; Ore-dressing -- Periodicals; Metallurgy -- Periodicals; 621
• DOI: 10.1080/08827508.2019.1707676
• Languages: English
• ISSNs: 0882-7508

Abstract

ABSTRACT: In this study, magnesium titanate was prepared through the high-temperature reaction of ilmenite and MgO in a reducing atmosphere, and its formation process and mechanism under different conditions were investigated. The results showed that a reducing atmosphere is necessary to prepare magnesium titanate. Although Mg could replace Fe and form magnesium titanate without reductant, the generated magnesium titanate contained large amounts of iron. While a reducing atmosphere promoted the formation of magnesium titanate and accelerated the reaction rate, this is because iron oxide in the reaction system is reduced to metal Fe under a reducing atmosphere. The effect of iron reduction improved, the content of iron in the magnesium titanate decreased with increasing temperature, and pure particles of magnesium titanate were generated at 1450°C. Magnesium titanate was transformed along MgTi2 O5 →MgTiO3 →Mg2 TiO4 path with increasing MgO dosage. The magnesium titanate product, contains above 90% Mg2 TiO4, was obtained by grinding and magnetic separation as non-magnetic product.