(PDF) Separation and recovery of iron and titanium from oxidized
Under the condition of reduction temperature of 1050 °C, reduction time of 120 min and gas composition of P(H2)/P(H2 + CO) = 0.72, a magnetic product containing 84.5 wt.% total iron with Fe ...
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In situ preparation of mesoporous iron titanium catalysts by a …
Iron titanium catalysts with uniform mesopores were synthesized using cetyl trimethyl ammonium bromide (CTAB) as a template-directing agent, and applied to the selective catalytic reduction of NO with NH 3.It was found that the catalyst exhibited high catalytic activity in a wide range of operating temperatures and good stability.
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An Overview of Thermochemical Reduction Processes for Titanium …
Titanium is one of the most abundant metals with superior properties such as excellent mechanical properties, high strength-to-weight ratio, and oxidation and corrosion resistance. However, it is commercially expensive to produce; hence, its use is limited. Currently, the Kroll process remains the most commercially exploited to produce titanium. Therefore, this …
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Separation and enrichment of valuable elements from slag …
This inhibition accelerated iron reduction and consequently enhanced Nb enrichment in Nb concentrates. Previous studies have shown that Nb enrichment can be partially achieved through carbothermal reduction and beneficiation processes. However, during carbothermal reduction, niobium and titanium oxides readily react with carbon to form NbC …
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Reduction of chengde vanadium titanium magnetite concentrate …
The reduction of VTM is primarily based on the reduction reactions of iron oxides and iron titanium oxides, such as Fe 3 O 4, Fe 2 TiO 4, and FeTiO 3. To clarify the reduction thermodynamics of the hydrogen-reduced VTM, the calculation results produced by FactSage under a non-microwave field were plotted, as shown in Fig. 4 .
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Case ReportSeparation of iron and titanium from titanium magnetite raw materials by low-temperature treatment and magnetic …
Direct reduction iron and titanium concentrate were produced. Calcium fluoride reduced the liquidus temperature and viscosity. Reduction roasting-magnetic separation …
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Rio Tinto Iron and Titanium Quebec operations
Rio Tinto Iron and Titanium (RTIT) Quebec Operations have been processing ore from northern Quebec for more than 70 years. ... RTIT Quebec Operations is looking for better ways to decarbonise its operations, with the aim of achieving a 50% reduction in greenhouse gas emissions by 2030 and reaching net zero by 2050. In partnership with the ...
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Reduction and Carbonization of Iron Concentrate with
Materials. The raw material used in this study is iron concentrate obtained from vanadium titanium bearing magnetite ore in Panzhihua area. The main chemical components of iron concentrate are given in Table 1.The employed gases were CH 4 (99.99 vol% Chongqing Ruixin Gas Co., Ltd.), H 2 (99.999 vol% Chongqing Ruixin Gas Co., Ltd.), and Ar (99.999 vol% …
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Enhancing Reduction Separation and Efficient Recovery of Iron, …
In this work, diboron xide and calcium fluoride are applied as composite additives to explore a process suitable for processing low-grade, high-vanadium, ultra-high-titanium vanadium–titanium magnetite. The metallized coal-based direct reduction–electromagnetic separation experiment was conducted. Results show that a good …
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[PDF] A method for recovery of iron, titanium, and vanadium from
An innovative method for recovering valuable elements from vanadium-bearing titanomagnetite is proposed. This method involves two procedures: low-temperature roasting of vanadium-bearing titanomagnetite and water leaching of roasting slag. During the roasting process, the reduction of iron oxides to metallic iron, the sodium oxidation of vanadium oxides …
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A novel process for the recovery of iron, titanium, and
The increase in roasting temperature favors the reduction of iron oxides but disfavors the oxidation of vanadium oxides. The recoveries of vanadium, iron, and titanium reached 84.52%, 89.37%, and 95.59%, respectively. Moreover, the acid decomposition efficiency of titanium slag reached 96.45%. Compared with traditional processes, the novel ...
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Enrichment and reconfiguration of titanium-bearing phase in …
To comprehensively utilize the low-iron high-vanadium–titanium magnetite, a new method of vortex smelting reduction of vanadium–titanium magnetite was proposed, and the enrichment and reconstitution regularity of Ti-bearing phases in the slag was investigated through X-ray fluorescence spectrometry, X-ray photoelectron spectroscopy, X-ray diffraction analysis, …
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Beaded segments like bi-metallic nano-zero-valent iron-titanium …
Nano-scale zero-valent iron (NZVI) is easy to be agglomerated and passivated in the process of U(VI) reduction and fixation. Herein, a facile one-step process for titanium modified beaded segments like nano-zero-valent iron nanoparticles (FTNP) was designed and prepared for U(VI) adsorption-reduction from aqueous solution.
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The influence of chromium substitution on an iron–titanium catalyst
The T 2 and T 3 reduction peaks were both ascribed to Cr 3+/2+ –O x –Ti → Cr 2+ –O x –Ti, because further reduction to metallic Cr 0 does not occur until above 1200 °C [44]. Therefore, in our CrTiO x sample, after the T 2 reduction peak, the majority of Cr species were in the Cr 2+ state, resulting in the formation of an analogous ...
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Ellingham Diagrams of Silicon, Iron, Titanium
Download scientific diagram | Ellingham Diagrams of Silicon, Iron, Titanium from publication: Direct Carbothermic Silica Reduction from Purified Silica to Solar-Grade Silicon | The shortage of ...
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P1: Standard Reduction Potentials by Element
Solids, gases, and liquids are identified; all other species are aqueous. Reduction reactions in acidic solution are written using H + in place of H 3 O +. You may rewrite a reaction by replacing H + with H 3 O + and adding to the opposite side of the reaction one molecule of H 2 O per H +; thus (ce{H3AsO4 + 2H^{+} + 2e^{–} <=> HAsO2 + 2H2O ...
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Separation and recovery of iron and titanium from oxidized …
Reduction and magnetic separation are two key steps in the treatment process. In order to obtain a high Fe-Ti separation efficiency, iron oxide of VTM ore must be reduced to …
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Hydrogen-based direct reduction of vanadium-titanium magnetite …
Additionally, this method effectively enriched iron and titanium, yielding recovery efficiencies of 91.0 % for iron and 58.4 % for titanium via wet grinding and magnetic separation. The reduction process of VTM followed a stepwise reaction mechanism, characterized by distinct pathways for titanium and iron.
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Asymmetric iron–titanium pairs within ultrathin TiO 2 …
Asymmetric iron–titanium pairs within ultrathin TiO 2 nanosheet enable high-efficiency nitrate reduction to ammonia . 7KLV 6XSSOHPHQWDU,QIRUPDWLRQ 6, IRU-RXUQDO RI0DWHULDOV &KHPLVWU $ MRXUQDO LV 7KH 5RDO 6RFLHW RI&KHPLVWU 2 Supplementary Figures. 2. Fig. S1.
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An effective and cleaner process to recovery iron, titanium, …
Vanadium titanomagnetite (VTM) is a multi-element mineral that is distributed throughout the world [1–3].In the Panxi-Hongge district in China, there are more than 3.55 billion tons of VTM resources [].Hongge vanadium titanomagnetite (HVTM), as one of the mine areas in Panxi-Hongge district, is rich in valuable elements including iron, titanium, vanadium, and …
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A method for recovery of iron, titanium, and vanadium from …
factors associated with the removal of iron nuggets from the vanadium-bearing titanium slag during the roasting process were systematically investigated. Behaviors such as slag melting, iron melting, and molten iron and slag se-paration were observed in situ. In addition, the recovery of vanadium by the water leaching process was also investi ...
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Research status of new technology for magnetization roasting and
The optimum reduction temperature range of hydrogen-based roasting reduction of vanadium-titanium magnetite is 850 ∼ 1050 ℃, the concentration of reducing gas should be 70 ∼ 80 %, and the gas flow rate can be controlled between 900–1000 ml·min −1, and the reduction time is generally 30 min.Under this roasting system, the effective ...
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A new process for the recovery of iron, vanadium, and titanium
For the thermodynamic analysis, it can be seen that the ΔG° values for all solid-solid and gas-solid reactions are negative at 1350°C, therefore the reduction reaction of VTM can proceed and the reduction products of iron oxide and ilmenite are iron and titanium oxides of low valences (Sadykhov et al., 2010; Paunova, 2002).
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Enhancing Reduction Separation and Efficient Recovery of Iron, …
The direct reduction iron containing 94.95% iron and 0.75% TiO2, titanium concentrate assaying 31.10% TiO2 were produced under optimal conditions, and metal …
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Value-added recycling of iron and titanium from bauxite residue …
The FeO in slag also suppressed the side reactions (i.e., carbonization of titanium and iron, reduction of silicon) in smelting process, which improved slag fluidity and iron nugget purity. This technique also provides a new approach for the utilization of V-bearing titanomagnetite, ilmenite, and other similar resources.
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Process mechanism research on direct vortex melting reduction of
3.1 Migration mechanism of Fe and V during reduction process. Figure 4 shows the variation of iron content in the slag with time, and Fig. 5 shows the variation of V content in the metal with time. As seen in Figs. 4a and 5, the reduction rate of iron and vanadium rises as the vortex rate increases, but th reduction reaches its limitation at u = 100 r min −1 (T = 1550 °C).
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Fusion Separation of Vanadium-Titanium Magnetite and …
Zhao Longsheng et al. used the rotary kiln pre-reduction-electric furnace method to treat vanadium-titanium magnetite, separated iron, vanadium and titanium efficiently, and enriched titanium into slag efficiently [24,25,26]. It can be observed that, whether it is the separation of raw ore or the use of metallurgical processes, there are ...
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Asymmetric iron–titanium pairs within ultrathin TiO2 nanosheets …
Electrochemical reduction of nitrate (NO3RR) is emerging as an efficient alternative method for decentralized ammonia (NH3) synthesis. However, the selectivity of nitrate reduction towards ammonia suffers from competitive hydrogen evolution owing to its preferred thermodynamics of hydrogen evolution. ... Asymmetric iron–titanium pairs within ...
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A novel process for the recovery of iron, titanium, and
A sodium modification–direct reduction coupled process was proposed for the simultaneous extraction of V and Fe from vanadium- bearing titanomagnetite. The sodium …
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Recent Progress in Titanium Extraction and Recycling
To make titanium a "common metal", a new reduction process that is high speed, energy-efficient, low cost, and of low environmental impact is required. The current status of titanium recycling …
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