Crystallization Behaviors of Anosovite and Silicate Crystals in High CaO and MgO Titanium Slag

Hong, Fan; Chen, Dengfu; Liu, Tao; Duan, Huamei; Huang, Yunwei; Long, Mujun

doi:10.3390/met8100754

Cited by 10 publications

(2 citation statements)

References 33 publications

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“…The product of the former process is called titanium slag, while the product of the latter three processes is called synthetic rutile. The reduction smelting has become a dominant process for preparing titanium-rich material worldwide [20]. Titanium slag prepared by the reduction smelting from ilmenite in the Panxi area cannot meet the requirement of the fluidized chlorination process due to its high content of CaO and MgO.…”

Section: Introductionmentioning

confidence: 99%

Migration and Enrichment Behaviors of Ca and Mg Elements during Cooling and Crystallization of Boron-Bearing Titanium Slag Melt

Hong

Wang

et al. 2021

Crystals

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Synthetic rutile was prepared from titanium slag melt with low energy consumption and a small amount of additive (B2O3) in our previous work. The modification mechanism of titanium slag was not clear enough. The migration and enrichment behaviors of Ca and Mg elements during cooling and crystallization of boron-bearing titanium slag melt were characterized by XRF, FESEM, EMPA, and XPS. Results show that when additive (B2O3) is added, Ti elements are migrated and enriched in the area to generate rutile, while Ca, Mg, and B elements are migrated and enriched in another area to generate borate. With the additive (B2O3) amount increased, Ca and Mg element migration is complete and more thorough. Additive (B2O3) promotes rutile formation and inhibits the formation of anosovite during cooling and crystallization of titanium slag melt. With the additive (B2O3) amount increasing from 0% to 6%, the proportion of Ti3+ in the modified titanium slag reduces from 9.15% to 0%, and the proportion of Ti4+ increases from 90.85% to 100% under the same cooling and crystallization condition. The result will lay the foundation for the efficient preparation of synthetic rutile by adding B2O3 to the titanium slag melt.

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Section: Introductionmentioning

confidence: 99%

Migration and Enrichment Behaviors of Ca and Mg Elements during Cooling and Crystallization of Boron-Bearing Titanium Slag Melt

Hong

Wang

et al. 2021

Crystals

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“…The silicates have a high SiO 2 /Al 2 O 3 ratio and show a lower melting behaviour compared to the pseudo-brookite phase which has a liquidus temperature of around 1600 • C. While cooling, pseudo-brookite starts forming just below 1600 • C and most of this phase is formed within 100 • C of cooling. Silicates, on the other hand, solidifies at much lower temperatures of around 1100-1300 • C [13].…”

Section: Introductionmentioning

confidence: 99%

Study of Synthetic Titania Slags Demonstrating Characteristics Similar to High Titania Ilmenite Slag

et al. 2022

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The upgradation of the ilmenite ore, using a pyrometallurgy method, is performed using a carbothermic reduction of the ilmenite. A high titania slag is obtained which is used as a feedstock for the TiO2 pigment production. The slag is cooled after tapping in big molds and can take ten days to cool. This cooling method has remained the same since the inception of ilmenite smelting and recently rapid cooling through granulation has been utilized. The work presented in this paper focuses on the microstructural study of the slags that were prepared using different techniques and cooled at different cooling rates. Various analytical techniques, such as X-ray powder diffraction (XRD), scanning electron microscopy (SEM), inductively coupled plasma-optical emission spectroscopy (ICP-OES), and X-ray photoelectron spectroscopy (XPS) were used to exhibit the similarity of these synthetic slags to the properties of high titania ilmenite slag. The slag consisted mostly of pseudo-brookite phase with a M3O5 stoichiometry and smaller amounts of silicate and rutile phase. A glassy phase of silica was observed and most of the impurities were found to be present in the silicate phase. These silica phases were observed to be separate from the pseudo-brookite phase and along the phase boundaries. Micro-cracking of the slag surface, which is the characteristic of the M3O5 phase formed in the ilmenite slag, were observed under the SEM analysis. The XPS analysis revealed that faster cooling does result in lower amount of oxidation but the difference in the TiO2 and Ti2O3 composition can have larger impact on oxidation than the cooling speed.

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Enrichment and reconfiguration of titanium-bearing phase in vortex smelting reduction process of vanadium–titanium magnetite

Han,

Dou,

Zhang

et al. 2024

J. Iron Steel Res. Int.

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Crystallization Behaviors of Anosovite and Silicate Crystals in High CaO and MgO Titanium Slag

Cited by 10 publications

References 33 publications

Migration and Enrichment Behaviors of Ca and Mg Elements during Cooling and Crystallization of Boron-Bearing Titanium Slag Melt

Migration and Enrichment Behaviors of Ca and Mg Elements during Cooling and Crystallization of Boron-Bearing Titanium Slag Melt

Study of Synthetic Titania Slags Demonstrating Characteristics Similar to High Titania Ilmenite Slag

Enrichment and reconfiguration of titanium-bearing phase in vortex smelting reduction process of vanadium–titanium magnetite

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