This article presents a new method to extract iron, titanium, vanadium, and chromium from high-chromium vanadium-bearing titanomagnetite concentrates, which are widely distributed in China. The method involves selective reduction, magnetic separation, and leaching processes. The advantages and limitations of this method are compared …

Uniform mesoporous iron titanium (CT-FeTi) catalysts were synthesized by a CTAB-assisted process and exhibited good catalytic activity and H 2 O resistance when tested in the selective catalytic reduction (SCR) of NO with NH 3 at low temperature. BET, TPD, TPSR and in situ DRIFTS were carried out to reveal the inhibition mechanism of H …

The current method for the production of titanium metal—the Kroll process—involves the reduction of pure titanium(IV) chloride (TiCl (_4)) using pure magnesium to produce titanium sponge [].Titanium(IV) chloride is produced by the carbo-chlorination of a relatively pure titanium dioxide feedstock, such as natural or synthetic …

A reliable titanium(III) standard solution became necessary when the authors were trying to determine the purity of the perchlorate salt. Perchlorate explosively reacts with organic materials; in contrast, the stoichiometric reduction of perchlo Titanium(III) is often standardized with iron(III).

The phase compositions of complex titanium-vanadium slags that form upon the processing (using the direct reduction of iron) of titanium-magnetite concentrates of ten CIS deposits are studied by … Expand. 12. Save. Recovery of titanium compounds from molten Ti-bearing blast furnace slag under the dynamic oxidation condition.

The titanium at tetrahedral position had a higher migration resistance than iron ion at tetrahedral gap during reduction reaction. Therefore, reduction of TiO 2 occurred at a higher temperature than Fe 2 O 3. A higher calcination temperature could facilitate the reduction of iron, silicon and titanium oxide by AlN.

In order to realize the comprehensive and efficient recovery of vanadium–titanium magnetite, a mass action concentration calculation model for direct melting reduction was established, and the mechanisms and limiting factors for the separation and enrichment between Fe, V, and Ti were also studied through molten …

A kind of magnetic iron-titanium oxide catalyst for selective catalytic reduction (SCR) of NO x with NH 3 is obtained by the microwave-pyrolysis co-precipitation method. This catalyst is characterized in detail by various techniques such as X-ray diffraction, N 2 adsorption–desorption, X-ray photoelectron spectroscopy, temperature …

The rich titanium–vanadium slag used in the present study was prepared through direct reduction reaction, magnetic separation, and desilication [19].The sample was chemically analyzed using inductively coupled plasma optical emission spectroscopy (ICP-OES, Optima 5300DV, Perkin-Elmer, USA) as shown in Table 1.The mineralogical …

Vanadium-containing titanium magnetite is the main source of V and Ti in the internal market. About 75% Fe, 82% V, and 44% Ti pass into iron concentrate during ore enrichment [].Therefore, the question of how to improve comprehensive utilization of vanadium-titanium magnetite concentrate (VTMC) is of decisive importance for the …

DOI: 10.1039/d1cy00750e Corpus ID: 237711078; Photocatalytic CO2 reduction to CH4 on iron porphyrin supported on atomically thin defective titanium dioxide @article{Wu2021PhotocatalyticCR, title={Photocatalytic CO2 reduction to CH4 on iron porphyrin supported on atomically thin defective titanium dioxide}, author={Yiwen Wu …

The direct reduction iron containing 94.95% iron and 0.75% TiO 2, titanium concentrate assaying 31.10% TiO 2 were produced under optimal conditions, and metal recovery for both products exceeded 80%. Calcium fluoride increased the liquid phase and reduced the viscosity of the slag system, thereby improving the growth of iron particles.

Photocatalytic CO 2 reduction to CH 4 is a promising strategy to solve the greenhouse effect and energy shortage problems. However, its application has been restricted by its low efficiency and poor selectivity. Herein, atomically thin defective TiO 2 is modified with iron tetraphenylporphyrin (FeTPP) to reinforce the selectivity of CO 2 reduction. The …

Chemical reduction of all oxides investigated has been observed and the data have been compared with theoretical predictions from a current model for preferential oxygen removal. Measurements of the core electron energy levels in oxides and some hydroxides of iron, cobalt, titanium and niobium have been made and the results are …

Previous research has shown that maximizing iron and vanadium reduction while minimizing titanium reduction is vital for achieving a fine slag–metal separation [10, 11]. At the same time, a suitable Ti-bearing phase and a high TiO 2 content in titanium slag are beneficial for further titanium recovery [7, 12]. Thus, it is essential to ...

Metal Magnesium Market Study by Iron & Steel Making, Titanium Reduction, Aluminum Alloys, and Die Casting from 2024 to 2034. Analysis of Metal Magnesium Market Covering 30+ Countries Including Analysis of US, Canada, UK, Germany, France, Nordics, GCC countries, Japan, Korea and many more.

OY furnace, an improvement of COREX, is the vigorously developed environmentally friendly iron-making process. However, it has a higher fuel ratio than blast furnace. The high prereduction degree (PRD) of direct reduction iron (DRI) is beneficial to decrease the fuel consumption of OY furnace but also affect the softening, melting, and …

DOI: 10.1016/J.MINPRO.2017.06.003 Corpus ID: 102881253; Recovering titanium and iron by co-reduction roasting of seaside titanomagnetite and blast furnace dust @article{Hu2017RecoveringTA, title={Recovering titanium and iron by co-reduction roasting of seaside titanomagnetite and blast furnace dust}, author={Tianyang Hu and Ti …

The results of reduction and titanium iron separation using co-reduction roasting with BFD and the reduction roasting process with coal were similar when lower amounts of fluorite were added in the co-reduction process. (3) Fixed carbon and volatile matter contents are lower in BFD than those in coal. However, co-reduction roasting …

An upgraded titanium mineral with a normalized TiO2 grade of 70.3% was achieved by H2 reduction at 850 °C for 0.5 h and acid leaching, which is a satisfactory Ti resource for the preparation of ...

Abstract — Oxidation and Reduction of Iron-Titanium Oxides in Chemical Looping Combustion: A Phase-Chemical Description— Ilmenite (FeTiO 3) is being explored as an oxygen carrier in chemical looping processes. Its reduction and oxidation are described by the system Fe-Fe 2 O 3-TiO 2-Ti 2 O 3. The

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 …

1. Introduction. Selective catalytic reduction (SCR) of NO with NH 3 is an efficient and economical technique for the removal of NO x from the exhaust gases of stationary and mobile sources, such as coal-fired power plants and lean-burn diesel engines. Nowadays, the most widely used catalyst system is V 2 O 5 –WO 3 (MoO …

@article{Liao2021BeadedSL, title={Beaded segments like bi-metallic nano-zero-valent iron-titanium for the fast and efficient adsorption and reduction of U(VI) in aqueous solutions}, author={Hui Liao and Wenkun Zhu and Tao Duan and Yong-De Zhang and Guiqiang He and Yanxia Wei and Jian Zhou}, journal={Colloids and Surfaces A: …

A series of cerium-doped iron–titanium composite oxide catalysts (FeCeaTi, a = 0.1–1.0) prepared by a urea homogeneous precipitation method were investigated for selective catalytic reduction of NOx with NH3 (NH3-SCR). Over all the FeCeaTi samples, a promotion effect for NOx reduction was induced by the …

Hydrogen reduction is one method currently being tested by many Universities. Products of hydrogen reduction are free iron, titanium dioxide (TiO 2), and water, which is split to recover the hydrogen and produce oxygen.. The basic process is to separate ilmenite from lunar soil, crush it to a fine powder to maximize the surface area, and then heat it in an …

Among these pathways, only calciothermic reduction and molten salt electrolysis are generally employed for producing metallic titanium directly from titanium oxide (TiO 2) raw material.As shown in Table 8.1, Table 8.2, Table 8.3 and Figure 8.3, Figure 8.4, from a thermodynamic point of view, it is impossible to produce metallic …

All iron and iron titanium oxides including ilmenite are reduced to metallic iron when inclining the temperature up to 870 °C. However, the reduction kinetics strongly depends on the physical-chemical properties of the samples, particularly on the particle size related to crystallite size and specific surface area.

High-chromium vanadium–titanium magnetite (HVTM) is an exceptional iron source that has not been mined on a large scale. Since using flux pellets facilitates the reduction in emissions and consumption, a reasonable way to utilize HVTM is by smelting it into flux pellets in a blast furnace. This study elucidates the reducibility and reaction …

Iron and titanium were recovered from beach titanomagnetite (TTM) concentrate by embedding direct reduction and magnetic separation. The reduction products and the effects of the reductant type and reduction temperature on the reduction behavior were investigated. The results showed that the reduction of TTM concentrate …