The oxidation state of vanadium in titanomagnetite from …
The redox conditions prevailing during the formation of vanadiferous titanomagnetites from three layered intrusions (Bushveld; Koillismaa; Skaergaard) have been …
Mechanism of vanadic titanomagnetite solid-state reduction
3.1 Effect of pre-oxidation 3.1.1 Effect of pre-oxidation on microstructure of vanadic titanomagnetite. There are two main reasons for the reduction differences between iron ore, one is the physical state of the ore (for example dense, porosity), and another is the chemical compositions of iron ore.
Investigation of the oxidation induration mechanism of Hongge vanadium
Vanadium titanomagnetite (VTM) is a special type of iron ore found in various countries, such as China, Australia, Russia, New Zealand, South Africa, and Canada [[1], [2], [3]].Deposited in the Panzhihua-Xichang area of Sichuan Province, Hongge VTM (HVTM) is a source not only of many valuable metal elements such as iron, titanium, and vanadium; it is …
The extraction of vanadium from titanomagnetites and other sources
Vanadium titanomagnetite (VTM) is a valuable multi-element ore composed primarily of iron, titanium, and vanadium, with minor amounts of chromium, nickel and cobalt, gallium and scandium, etc. [1 ...
Migration Behavior of Valuable Components in Pellets …
Sand Vanadium Titanomagnetite During the Oxidation Roasting Process ... Sea sand vanadium titanomagnetite is a complex iron ore resource with titanomagnetite as the main
Hydrogen reduction behaviors and mechanisms of vanadium titanomagnetite
Vanadium titanomagnetite ore has prominent latent applications in the recovery of iron, vanadium and titanium. In this study, the reduction effect and product characteristics of vanadium titanomagnetite ore using hydrogen as reductant under fluidized bed conditions were investigated by X-ray diffraction, scanning electron microscopy and energy dispersive …
Influence of B2O3 on the Oxidation and Induration Process …
As part of ongoing work to develop a low fuel consumption smelting process for comprehensive utilization of Hongge vanadium titanomagnetite (HVTM), the influence mechanism of SiO2 on the oxidation ...
Non-isothermal oxidation induration mechanism of vanadium
To understand the non-isothermal oxidation induration mechanism of vanadium titanomagnetite (VTM) pellets, change of compressive strength, porosity, phase composition, and morphology were investigated in this study. ... Vanadium titanomagnetite (VTM) is a type of iron ore that contains several valuable metallic elements, which are mainly iron ...
Oxidation Kinetics, Structural Changes and Element …
The oxidation kinetics, structural changes, and elements migration during the oxidation process of the vanadium-titanium magnetite (VTM) ore were analyzed.
Gas-based reduction of vanadium titano-magnetite …
3.1.2. Effect of pre-oxidation on the metallization degree of reduction The effects of pre-oxidation on the metallization degree of reduced vanadium titano-magnetite pellets were studied in the following experiments. The oxidation process condition was an oxidation temperature of 1200°C and an oxidation time of 20 min.
Transformation of Vanadium-Bearing Titanomagnetite Concentrate …
Transformation of Vanadium-Bearing Titanomagnetite Concentrate in Additive-Free Roasting and Alkaline-Pressure Leaching for Extracting Vanadium (V) ... Thermodynamic analyses show that oxidation ...
Titanomagnetite
The principal ore minerals are titanomagnetite and ilmenite, ... (near magnetite) and rhombohedral (near ilmenite) phases. Two stages of low temperature oxidation of titanomagnetite are shown in Figs. 2.8g–2.8h. ... but their ilmenomagnetite and vanadium grades become lower toward the west of the deposit area (Markkula, 1980).
Optimized magnetic separation for efficient recovery of V …
The Samyang Resource Company, which operates in Yeoncheon, Korea, has directly produced around 200,000 tons of VTM ore over the past five years from the Gwanin mine [31, 32].Approximately 0.4–0.6% of vanadium content was detected in these VTM ores, and considering the high vanadium content, preliminary research into the potential for the …
Accepted Manuscript Not Copyedited
More than 90% of titanium and vanadium resources are found in vanadium-bearing titanomagnetite ore (main phase ... ore. The oxidation degree (OD) of samples was calculated by formula (2).
Effect of Cr2O3 addition on the oxidation induration …
As part of a research project to develop a novel clean smelting process for the comprehensive utilization of Hongge vanadium titanomagnetite (HVTM), in this study, the effect of Cr2O3 addition on the oxidation induration mechanism of HVTM pellets (HVTMPs) was investigated in detail. The results showed that the compressive strength of the HVTMPs was greatly weakened by the …
Separation of Ilmenite from Vanadium Titanomagnetite by …
Vanadium titanomagnetite (VTM) is an important mineral for developing titanium resources, but the comprehensive recovery of ilmenite separation is extremely poor, resulting in the low-efficiency utilization of titanium resources. Here, the separation of ilmenite from VTM ore is studied by combining magnetic separation and flotation technologies. In particular, the …
Theoretical Modeling and Experimental Evaluation of Vanadium …
A sodium modification–direct reduction coupled process was proposed for the simultaneous extraction of V and Fe from vanadium- bearing titanomagnetite. The sodium oxidation of vanadium oxides to ...
A review on vanadium extraction techniques from major vanadium …
Vanadium is a rare metal with strategic significance, mainly used in the steel industry, aerospace, chemical industry, and energy storage [1,2,3,4,5,6,7,8,9].In the metallurgical industry, by adding a small amount of vanadium to steel, the strength, toughness, ductility, and heat resistance of steel can be effectively improved [].In the aerospace industry, small amounts …
Oxidation kinetics of a low-grade vanadiferous …
low-grade vanadiferous titanomagnetite ore when processing it [10-12]. Therefore, in order to improve the utilization efficiency of low-grade vanadiferous titanomagnetite concentrate with …
A novel process for the recovery of iron, titanium, and vanadium …
A sodium modification–direct reduction coupled process was proposed for the simultaneous extraction of V and Fe from vanadium- bearing titanomagnetite. The sodium oxidation of vanadium oxides to water-soluble sodium vanadate and the transformation of iron oxides to metallic iron were accomplished in a single-step high-temperature process. The …
Investigation of the oxidation induration mechanism of Hongge vanadium
The oxidation behaviour of fine ore was investigated by TG-DTA analysis under oxygen atmosphere. ... The heating rate of the vanadium titanomagnetite in the microwave field can be divided into ...
Oxidation behavior of low-grade vanadiferous …
Keywords Low-grade vanadiferous titanomagnetite concentrate Oxidation degree Phase transformation Micromorphology Oxidation path Pore structure 1 Introduction Vanadiferous titanomagnetite (VTM) ore is an important natural multi-mineral co-associated magnetic material ... recovery rates of iron, titanium, vanadium, and chromium were 97.9%, 89.8% ...
Migration Behavior of Valuable Components in Pellets with …
Sea sand vanadium titanomagnetite is a complex iron ore resource with titanomagnetite as the main ore phase formed by erosion. There are deposits distributed in Japan, Philippines, Indonesia, Australia, New Zealand and the coastal areas of Hainan Island in China, which are rich in reserves, easy to be mined and low in price. 1,2,3,4 Sea sand vanadium …
Oxidation behavior of low-grade vanadiferous …
In order to clarify the oxidation mechanisms and make better use of the low-grade vanadiferous titanomagnetite concentrate with high titanium (LVTC), the oxidation behavior of …
The extraction of vanadium from titanomagnetites and …
Most of the vanadium is produced from titanomagnetites either directly from titanomagnetite ores/concentrates or indirectly from the slag left from smelting titanomagnetite …
Oxidation State of Vanadium in Natural V-bearing …
To understand the factors controlling the incorporation of vanadium in magnetite, we have investigated the crystal-chemistry of vanadium in natural titanomagnetite samples from two magnetite seams of the Bushveld complex using X-ray …
Recovery of Vanadium, Titanium, and Iron from Vanadium Titanomagnetite
Vanadium titanomagnetite concentrate (VBT) is a kind of multi-metal element symbiotic compound ore, containing iron, vanadium, and titanium [].More than 85% of vanadium and 90% of titanium originate from VBT in China [2, 3].The western Liaoning area is another large deposit in China besides Panzhihua, which is characterized by high grades of vanadium and …
The extraction of vanadium from titanomagnetites and other sources
While vanadium production flow sheets vary between different mines and processing plants, there are a few common features. The process used will vary depending on the nature of the ore. Most vanadium is produced from titanomagnetite ores, either directly or from the slag generated by smelting of titanomagnetite ores.
A New Route of Roasting-Flotation-Leaching for the …
In this work, a complete beneficiation technical route combining physical and chemical methods, namely a roasting-flotation-leaching scheme, is proposed to produce a qualified grade Ti-concentrate from altered Vanadium titanomagnetite (VTM) ore. Based on the character of the ore sample, it is recommended to recover the Ti-bearing minerals, ilmenite and …
(PDF) Behavior and mechanism of pre-oxidation …
With respect to high efficient utilization of low-grade iron ore resource, the behavior of low-temperature "973 K to 1123 K (700 °C to 850 °C)" oxidation, on the phase transition of SA TTM ...