Direct extraction of perovskite CaTiO3 via efficient dissociation of silicates from synthetic Ti-bearing blast furnace slag

Wu, M.; Lü, Huihong; Liu, Minchao; Zhang, Zhengli; Wu, Xingrong; Liu, Weiming; Wang, Ping; Li, Liaosha

doi:10.1016/j.hydromet.2016.10.026

Cited by 43 publications

(18 citation statements)

References 21 publications

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“…In the FT-IR spectrum of perovskite, the band at 574.1 and 446.4 cm −1 can be attributed to the Ti−O stretching and Ti−O−Ti bridge stretching modes [22,23], and that at 3433.3 cm −1 belongs to the bending vibration of the O-H band in hydroxyls and water adsorbed on perovskite surfaces [22,23]. The FT-IR spectra of perovskite with OHA at different pH levels show additional C-H, C=O, and N-O stretching intensities for OHA compared with the pure perovskite.…”

Section: Ft-ir Analysismentioning

confidence: 99%

Flotation Behaviors of Perovskite, Titanaugite, and Magnesium Aluminate Spinel Using Octyl Hydroxamic Acid as the Collector

et al. 2017

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Abstract:The flotation behaviors of perovskite, titanaugite, and magnesium aluminate spinel (MA-spinel), using octyl hydroxamic acid (OHA) as the collector, were investigated using microflotation experiments, zeta-potential measurements, Fourier transform infrared (FT-IR) analyses, X-ray photoelectron spectroscopy (XPS) analyses, and flotation experiments on artificially mixed minerals. The microflotation experiments show that the floatability of perovskite is clearly better than titanaugite and MA-spinel at around pH 5.5, while titanaugite possesses certain floatability at pH 6.0-6.5, and MA-spinel displays good floatability at pH > 8.0. The results of the FT-IR and XPS analyses show that OHA mainly interacts with Ti, resulting in perovskite flotation, and that the Al on titanaugite, as well as the Mg and Al on the MA-spinel surface, chemically react with OHA under acidic conditions. However, OHA mainly reacts with the Ti and Ca on the perovskite surface, Ca and Mg on the titanaugite surface, and Mg and Al on the MA-spinel surface under alkaline conditions. The results of the artificially mixed mineral flotation experiment show that the concentrate of TiO 2 grade increased from 19.73% to 30.18% at pH 5.4, which indicates that a weakly acidic solution is the appropriate condition for the flotation separation of perovskite from titanaugite and MA-spinel. The results of the modified slag flotation experiments show that the TiO 2 grade of concentrate increased from 18.13% to 23.88% at pH 5.4, through the open circuit test of "one roughing and one cleaning". OHA displays selectivity toward perovskite in the modified slag flotation, but the consumption of H 2 SO 4 is very high. The CaSO 4 precipitate covered on the mineral surfaces results in poor TiO 2 grade and recovery.

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Section: Ft-ir Analysismentioning

confidence: 99%

Flotation Behaviors of Perovskite, Titanaugite, and Magnesium Aluminate Spinel Using Octyl Hydroxamic Acid as the Collector

et al. 2017

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“…With the steady growth in the generation of blast furnace slags from vanadium-titanium magnetite ores, the recovery of titania from industrial titaniabearing slags containing 22-25 wt.% TiO 2 1-3 is attracting increasing attention. [3][4][5][6][7][8][9][10][11][12][13][14][15] Over the past decades, both hydrometallurgical and pyrometallurgical methods [15][16][17][18][19][20][21][22][23][24] for processing titania-bearing slags have been applied and investigated intensively. Recently, a selective crystallization method and separation of a titania-enriched phase has also been proposed [25][26][27] to collect titania into a certain phase.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Phase Relations of the SiO2-MgO-TiO2 System in Air at 1500°C

Chen

Wan

Shi

et al. 2021

JOM

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We investigated the phase relations of the SiO2-MgO-TiO2 system in air at 1500°C using the high-temperature isothermal equilibration/quenching technique, followed by x-ray diffraction measurements and direct phase analysis using scanning electron microscopy coupled with x-ray energy dispersive spectrometry. One single liquid phase domain, five two-phase domains (liquid-TiO2, liquid-cristobalite, liquid-MgO·SiO2, liquid-2MgO·SiO2, and liquid-MgO·2TiO2), and five three-phase regions (liquid-TiO2-MgO·2TiO2, liquid-MgO·SiO2-cristobalite, liquid-TiO2-cristobalite, liquid-MgO·SiO2-2MgO·SiO2 and liquid-2MgO·SiO2-MgO·2TiO2) were observed. We constructed a 1500°C isothermal phase diagram based on the experimentally measured liquid compositions. We compared simulations using MTDATA and FactSage thermodynamic software and their databases with the experimental results obtained in this study. These results can be used to provide guidelines for updating the MTDATA and FactSage titania-bearing thermodynamic databases by reassessing the thermodynamic properties of the phase with new experimental data.

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“…Perovskite grains with parallel dendrite arrays and small sizes were obtained with a high cooling rate of 4°C/min, and the dendrite trunks gradually converted to complete crystals with coarsened grain size when the cooling rate is decreased. In specific, bulk crystals with a grain size of 55 µm were obtained at the cooling rate of 0.5°C/min, and the content of the perovskite phase was determined to be 27wt% [68]. Although the slow cooling rate can efficiently increase the grain size of the obtained perovskite phase, the increase in the content of the perovskite phase is rather limited compared with that obtained at high cooling rates.…”

Section: Enrichment Of Perovskite Phasementioning

confidence: 99%

Recent progress of efficient utilization of titanium-bearing blast furnace slag

Cai

Song

Yang

et al. 2022

Int J Miner Metall Mater

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Titanium-bearing blast furnace slag (BFS) has valuable compositions and potential environmental hazardousness. Thus, developing efficient and green approaches to utilize BFS is highly desired for resource economization and environmental protection. In the past decades, many attempts have been adopted to reuse BFS efficiently, and significant advances in understanding the fundamental features and the development of efficient approaches have been achieved. This review provides a comprehensive overview of the latest progress on the efficient utilization of BFS and discusses the mechanism and characteristics of various approaches, along with their application prospects. In particular, the extraction and enrichment of titanium-bearing phases from BFS are highlighted because of the high availability of titanium resources. This systemic and comprehensive review may benefit the design of new and green utilization routes with high efficiency and low cost.

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Direct extraction of perovskite CaTiO3 via efficient dissociation of silicates from synthetic Ti-bearing blast furnace slag

Cited by 43 publications

References 21 publications

Flotation Behaviors of Perovskite, Titanaugite, and Magnesium Aluminate Spinel Using Octyl Hydroxamic Acid as the Collector

Flotation Behaviors of Perovskite, Titanaugite, and Magnesium Aluminate Spinel Using Octyl Hydroxamic Acid as the Collector

Experimental Study on the Phase Relations of the SiO2-MgO-TiO2 System in Air at 1500°C

Recent progress of efficient utilization of titanium-bearing blast furnace slag

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