Factor analysis on the purity of magnesium titanate directly prepared from seashore titanomagnetite concentrate through direct reduction

Xiao-ping Wang; Zhao-chun Li; Ti-chang Sun; Jue Kou; Xiao-hui Li

doi:10.1007/s12613-020-1990-7

Volume 27 Issue 11

Nov. 2020

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2020 > 27(11): 1462-1470

Xiao-ping Wang, Zhao-chun Li, Ti-chang Sun, Jue Kou, and Xiao-hui Li, Factor analysis on the purity of magnesium titanate directly prepared from seashore titanomagnetite concentrate through direct reduction, Int. J. Miner. Metall. Mater., 27(2020), No. 11, pp. 1462-1470. https://doi.org/10.1007/s12613-020-1990-7

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Xiao-ping Wang, Zhao-chun Li, Ti-chang Sun, Jue Kou, and Xiao-hui Li, Factor analysis on the purity of magnesium titanate directly prepared from seashore titanomagnetite concentrate through direct reduction, Int. J. Miner. Metall. Mater., 27(2020), No. 11, pp. 1462-1470. https://doi.org/10.1007/s12613-020-1990-7

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Research Article

Factor analysis on the purity of magnesium titanate directly prepared from seashore titanomagnetite concentrate through direct reduction

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Corresponding authors:
Jue Kou E-mail: 35135073@qq.com

Xiao-hui Li E-mail: 1182863294@qq.com
Received: 29 September 2019; Revised: 21 January 2020; Accepted: 22 January 2020; Available online: 11 February 2020

Abstract

Abstract

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.
- seashore titanomagnetite;
- magnesium oxide;
- direct reduction;
- magnesium titanate

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