High chromium vanadium-titanium magnetite (HCVTM) is a typically complex polymetallic iron ore resource with abundant reserves in China. It is mainly deposited around the Panzhihua-Xichang (Panxi ...

The application of microwave-assisted grinding for vanadium-titanium magnetite proves advantageous in improving the particle size composition of the grinding product. …

Vanadium-titanium-bearing magnetite of Panzhihua, China, is a complex iron ore with the coexistence elements of vanadium and titanium. It accounts for more than 90% ... works have been conducted on the mechanism and kinetics of the carbothermic reduction of titanomagnetite4–11) and titanium-bearing blast furnace slag.12–15) Although many

High chromium vanadium–titanium magnetite (HCVM), with over 3.5 billion tons mainly distributed throughout the Panxi-Hongge District in China, ... In the present paper, the isothermal reduction kinetics and mechanism of high chromium vanadium–titanium pellets were studied at 800–1100°C. The microstructures were examined by a SEM …

To achieve the high-efficiency utilization of vanadium-titanium magnetite (VTM), reduction experiments were conducted to determine the carbothermic reduction mechanism of VTM. Effects of volatile matter, temperature, time, and carbon ratio (molar ratio of fixed carbon in coal to oxygen in iron oxides of VTM) on reduction degree were …

Abstract. In order to better develop and utilize the low-grade vanadiferous titanomagnetite concentrate with high titanium (LVCHT) and provide reference for the …

The grinding behavior of the as-received (5 pct moisture) vanadium-titanium magnetite concentrates in a damp mill was investigated in this paper. A grinding kinetics equation was established based on a population balance model using size distribution data obtained from a laser diffraction technique. X-ray diffraction results show that a loss in crystallinity …

Read this article. The induration process and oxidation kinetics of Hongge vanadium titanium-bearing magnetite (HVTM) pellets have been investigated by employing X-ray diffraction, scanning electron microscope, energy-dispersive …

The solid-state reduction kinetics of pre-oxidized vanadium-titanium magnetite concentrate was studied. The phase and microstructure of the reduction …

Key words: vanadiumítitanium magnetite; solid-state reduction; reduction kinetics; reduction process 1 Introduction Panxi Area of China is endowed with large reserves of vanadiumítitanium magnetite, and the reserves of vanadium and titanium account for 11.6% and 35.17% of the total reserves in the world, respectively [1í4].

High-chromium vanadium–titanium magnetite (HCVTM) is a good valuable resource with high iron content in the form of complex iron ore which contains various valuable metal elements such as iron, vanadium, titanium, chromium. Direct reduction of HCVTM is studied based on thermodynamic analysis. Combined TG experimental …

In this work, we use an inorganic titanium precursor (titanium oxysulfate, TiOSO4) for the preparation of doped TiO2 by the sol–gel method. Molybdenum (Mo), iron (Fe) and vanadium (V) in the concentration range of 0.0312–2.0 mol% are added as dopants. The prepared samples were characterized by XRD, FTIR, N2 isotherms, …

International Journal of Minerals, Metallurgy and Materials - The reduction of vanadium titano-magnetite pellets by H2–CO at temperatures from 850 to 1050°C was investigated in this...

35 Citations. Explore all metrics. Abstract. The grinding behavior of the as-received (5 pct moisture) vanadium-titanium magnetite concentrates in a damp mill was …

A staged scheme is proposed for the oxidative ammonolysis of mesitylene on a vanadium-titanium oxide catalyst. Numerical values of the rate constants of the stages were found on a computer on the basis of the condition of minimization of the function of deviations between experimental and calculated values of the observed rates with the aid of the …

@article{Pan2016OxidationKS, title={Oxidation Kinetics, Structural Changes and Element Migration during Oxidation Process of Vanadium-titanium Magnetite Ore}, author={Feng Pan and Qingshan Zhu and Zhan Du and Haoyan Sun}, journal={Journal of Iron and Steel Research International}, year={2016}, volume={23}, pages={1160-1167}, …

Coal-based reduction and magnetic separation behavior of low-grade vanadium-titanium magnetite pellets were studied in this paper. It is found that the metallization degree increased obviously with an increase in the temperature from 1100 °C to 1400 °C. The phase composition transformation was specifically analyzed with X-ray …

The oxidation kinetics, structural changes, and elements migration during the oxidation process of the vanadium-titanium magnetite (VTM) ore were analyzed. Kinetics analysis indicated that the oxidation process was controlled by diffusion control and could be divided into interface diffusion and lattice diffusion with apparent activation …

The gas-based isothermal reduction kinetics of oxidized vanadium titano-magnetite (VTM) under the range of 1173–1323 K was investigated in this study. The influence of reduction temperature, gas composition and reduction time on reduction process were studied. ... The reserves vanadium and titanium account for 11.6% and …

In addition, temperature was an important factor influencing on reaction rate. Key words : carbon composite pellet; reduction kinetic; catalyst; vanadium titano-magnetite Vanadium titano-magnetite is a kind of complex iron ore which contains various valuable metal ele­ ments such as iron, vanadium, titanium, etc.

Reduction of chromium-bearing vanadium–titanium sinter (CVTS) was studied under simulated conditions of a blast furnace, and thermodynamics and kinetics were theoretically analyzed. Reduction kinetics of CVTS at different temperatures was evaluated using a shrinking unreacted core model. The microstructure, mineral phase, …

In this paper, potassium salt roasting additives were applied to extract vanadium from vanadium–titanium magnetite concentrate. Meanwhile, the mechanisms of potassium salt roasting and acid leaching kinetics …

DOI: 10.1016/S1003-6326(14)63479-8 Corpus ID: 51896750; Solid-state reduction kinetics and mechanism of pre-oxidized vanadium–titanium magnetite concentrate @article{Liu2014SolidstateRK, title={Solid-state reduction kinetics and mechanism of pre-oxidized vanadium–titanium magnetite concentrate}, author={Shuishi Liu and Yu-Feng …

The present controlled in vitro experiment evaluated the dissolution kinetics of titanium (Ti), aluminum (Al) and vanadium (V). Titanium alloy (Ti90Al6V4) dental implants were inserted in 1.8 ml sterile tubes, containing equal volumes of NaCl 0.9% (w/v) and human serum. Metallic elements released by the atomic process of corrosion were measured ...

The role of cluster size and composition is investigated by studying the reaction kinetics of larger (V 6 O 15 − and V 8 O 20 −) and titanium doped (V 3 TiO 10 − and V 2 Ti 2 O 10 −) vanadium oxide clusters with SO 2. The observed cluster size and composition dependencies are discussed.

Keywords: sinter; kinetics; reduction; mineral phase 1. Introduction Vanadium–titanium magnetite contains high amounts of Fe, V, and Ti components, which exhibit valuable applica-tions in various industries. Vanadium–titanium magnetite reserves are estimated to exceed 20 billion tons in China [1]. This study focuses on chromium-bearing vana-

Grinding Kinetics of Vanadium-Titanium Magnetite Concentrate in a Damp Mill and Its Properties. H. Long, T. Chun, +3 authors. Jiaxin Li. Published in Metallurgical and …

open access. Highlights. •. The mineralogical analysis of the VTM ore was systematically performed. •. The magnetic separation of vanadium based on grinding …

The thermoravimetry-differential scanning calorimetry-quadrupole mass spectrometer method was used for kinetic analysis of the main reduction process. Results indicate that the kinetic mechanism follows the principle of random nucleation and growth ( n=4 ), and the activation energy values at 600–900 and 900–1350 °C are 88.7 and 295.5 …

Vanadium-titanium magnetite underwent closed circuit crushing before and after microwave pretreatment. Subsequently, batch grinding tests were conducted on the crushed products, with varying grinding times. Ultimately, the m-order grinding kinetics model of the ore was established both before and after microwave pretreatment. The …