Study on Character of Ilmenite Modified by Thermal Treatment

Xue, Xingwei; Yang, Zhi; Ouyang, Hong Yong

doi:10.4028/www.scientific.net/amr.284-286.2090

Cited by 6 publications

(5 citation statements)

References 2 publications

(2 reference statements)

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“…In the subsequent reduction, two types of reduction reaction systems, Fe-C and Ti-C, are dominant. However, the actual reaction is primarily dominated by Fe-C reduction [24][25][26][27]. The possible reactions in the thermal reduction process are shown in table 2.…”

Section: Resultsmentioning

confidence: 99%

Research on the process and mechanism of preparing titanium-rich materials from complex ilmenite

Wei,

Liu,

Yang

et al. 2024

Mater. Res. Express

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A new process for the development and utilization of titanium-iron sand ore from Yunnan province is proposed. We provide a detailed analysis of the chemical composition and mineral structure of the raw material, and describe a pretreatment involving low-temperature oxidation and reduction, hydrofluoric acidolysis, and hydrochloric acid leaching to remove impurities and generate titanium-rich materials. Hydrofluoric acid was used to break down the complex titanite, silica-titanium, and calcium-titanium mixture in the starting mineral into simple oxides. The results have indicated that the thermal reduction process should not be conducted at elevated temperatures. Optimal process conditions are established for the leaching process: leaching temperature of 80°C; leaching time of 240 min; hydrofluoric acid concentration of 3%; liquid-solid ratio of 6 mL/g. Under these conditions, the extent of TFe leaching reached 96%, while the leaching of Ca and Mg reached 94%. The TiO2 grade of the final titanium-rich material was 89.95%, with a CaO content of 0.39%, a MgO content of 0.15%, and a TFe content of 7.5%. This material can serve as raw material for subsequent chlorination.

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Section: Resultsmentioning

confidence: 99%

Research on the process and mechanism of preparing titanium-rich materials from complex ilmenite

Wei,

Liu,

Yang

et al. 2024

Mater. Res. Express

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“…The carbon content was evaluated by thermal gravimetric analysis (TGA) as shown in Figure 2B. The initial weight increase between 150 and 330 • C can be attributed to the oxidation of L-FTO to TiO 2 and Fe 2 O 3 in the air (Xiong et al, 2011;Yu et al, 2017a). When the sample was heated up to 330 • C in the air, the weight loss of ∼3% that occurred between 330 and 450 • C can be ascribed to the combustion of carbon in the air (Yu et al, 2017a):…”

Section: Resultsmentioning

confidence: 99%

Designing Uniformly Layered FeTiO3 Assemblies Consisting of Fine Nanoparticles Enabling High-Performance Quasi-Solid-State Sodium-Ion Capacitors

Liu

Zhao

et al. 2020

Front. Chem.

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Sodium-ion capacitors (NICs) that have integrated the dual advantages of the high output of supercapacitors and the high energy density of batteries have stimulated growing attention for the next generation of practical electrochemical energy storage devices. The last years have seen the unprecedentedly rapid emergence of ilmenite materials, which present great promise in the realm of energy storage. However, NICs based on ilmenite materials have been scarcely researched so far. Instead, most of the current devices explored applied flammable liquid electrolytes, leading to a concern about unexpected leakage and potential safety problems. Herein, a quasi-solid-state NIC is constructed by employing the prepared uniformly layered FeTiO 3 assemblies consisting of fine nanoparticles as anode and sodium ion conducting gel polymer as electrolyte. The resulting device delivers a high-energy-high-power density (79.8 Wh kg −1 , 6,750 W kg −1 ), putting it among the state-of-the-art NICs. Furthermore, the assembled quasisolid-state device also manifests long-term cycling stability over 2,000 cycles with a capacity retention ∼80%. The uniformly layered FeTiO 3 has great potential in developing low-cost and high-performance electrodes for the next generation of sodium and other metal ions-based energy storage devices.

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“…The FRX results also showed the sands have some impurities such as silicon (Si), magnesium (Mg), calcium (Ca), aluminum (Al), sodium (Na) and manganese (Mn), which correspond to the cummingtonite. These ferrotitaniferous sands with 56% ilmenite, as shown in the XRD analysis, cannot be considered as an ilmenite concentrate because a concentrate must be composed of more than 75% ilmenite [15,16]. Since the ilmenite content in these ferrotitaniferous sands is well below the minimum level required for industrial utilization, this work studied the leaching of oxidized-reduced ilmenite to improve the recovery process.…”

Section: Discussionmentioning

confidence: 99%

Titanium Dioxide Recovery from Ilmenite Contained in Ferrotitaniferous Sands from Mompiche-Ecuador

Trujillo¹,

Manangón²

2016

JGRE

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Titanium dioxide (TiO 2) was recovered from ilmenite (FeO•TiO 2) contained in ferrotitaniferous sands of Mompiche area, by the combination of the thermal treatments of oxidation and carbothermic reduction and the subsequent leaching with hydrochloric acid (HCl) of the thermally treated samples. This study was developed because of the large source of TiO 2 that Ecuador has, but has not developed enough research to place an industry to produce this compound. The oxidation at 900 °C for 3 h yielded a content of 11% of TiO 2 , and the highest oxidation of ilmenite (82%) was achieved at 1,000 °C for 1 h. The carbothermic reduction with 15wt% carbon at 950 °C for 2 h achieved a content of 6% TiO 2 and 21% ilmenite. The combination of thermal treatments did not increase the content of TiO 2 but allowed to obtain more soluble minerals in HCl. The best results of leaching were obtained with 100 mL of 256 g/L HCl for 6 h at 70 °C and 10% solids of the sample oxidized at 900 °C for 3 h and subsequently reduced with 15wt% carbon at 950 °C for 2 h. The optimum leaching time was 4 h, giving a TiO 2 of 90% purity with a recovery of 43%.

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Study on Character of Ilmenite Modified by Thermal Treatment

Cited by 6 publications

References 2 publications

Research on the process and mechanism of preparing titanium-rich materials from complex ilmenite

Research on the process and mechanism of preparing titanium-rich materials from complex ilmenite

Designing Uniformly Layered FeTiO3 Assemblies Consisting of Fine Nanoparticles Enabling High-Performance Quasi-Solid-State Sodium-Ion Capacitors

Titanium Dioxide Recovery from Ilmenite Contained in Ferrotitaniferous Sands from Mompiche-Ecuador

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