The fitting slope of ln[−ln(1 − α)]-ln t for non-isothermal kinetics was between 1.3 and 2.6. Therefore, according to the common kinetics models and the value of n listed in Table 3, the non ...
The phase transformation of pre-oxidized vanadium titano-magnetite pellets during the reduction process under an H2 atmosphere and a CO atmosphere was discussed, and the reduced samples were analyzed by scanning electron microscopy (SEM) in conjunction with back scatter electron (BSE) imaging.
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The characterization results for natural vanadium titano-magnetite by Liang et al. (2010) indicated that trivalent V in titano-magnetite cannot exist in the form of vanadium …
Vanadium titano-magnetite (VTM) is a multi-metal ele-ment composite of metal minerals, and it has extensive utilization value because it is the main carrier of iron, vanadium, and titanium.1,2) VTM exhibits a dense structure and complex interaction between valuable elements, and thus valuable metals cannot be directly extracted from it.3,4)
The vanadium titano-magnetite is the main raw materials for producing pigment and vanadium. At the same time, many scholars have been dedicated to studying on comprehensive utilization of titanium slag to prepare titanium material (Liu et al., 2013, Zhang et al., 2007). Now, a large number of un-mined vanadium titano-magnetite with …
Experiments were carried out by adding NaF as catalyst in a Ar atmosphere to study the isothermal reduction kinetics of vanadium titano-magnetite carbon composite pellets under high temperature in the range from1473 to 1673K. By analyzing reduction mechanism, it was...
Recovering vanadium from vanadium titanium-magnetite (VTM) ore using (NH 4) 2 C 2 O 4 is a clean hydrometallurgical process, but the drawback is the low recovery and slow kinetics due to the formation of inhibitor. A novel energy-efficient mathematical model was derived for green leaching of VTM in which the mechanical activation (MA) removed the …
Many technologies exist for the treatment of titaniferous magnetites that contain vanadium. Each process is designed based on the relative amounts of titanium, vanadium and …
the ratio of V3+ to V4+ which will in turn affect how vanadium par-titions between magnetite and ilmenite in titanomagnetites (Schuiling and Feenstra, 1980). Vanadium …
Vanadium titano-magnetite ore is a kind of multi-elements-coexistent mineral which mainly contains V, Ti and Fe. There are approximately one billion tonnes of vanadium titano-magnetite resource sto...
1. Introduction. Titanium plays a considerably important role in the modern industry, which is widely used in aerospace, military, metallurgy, solar cell, pigment and other advanced materials fields [1], [2], [3].As one of the largest of titanium resources in the world, vanadium titano-magnetite represents a valuable raw material for the production of …
DOI: 10.1016/J.MINPRO.2016.09.012 Corpus ID: 100526996; Vanadium extraction from titano-magnetite by hydrofluoric acid @article{Zhu2016VanadiumEF, title={Vanadium extraction from titano-magnetite by hydrofluoric acid}, author={Xiao-bo Zhu and Wang Li and Xuemao Guan}, journal={International Journal of Mineral Processing}, year={2016}, …
ABSTRACT In this study, a new vanadium extraction process from vanadium titano-magnetite(VTM) featuring calcification roasting and (NH4)2C2O4 solution leaching has been proposed. Compared with the traditional sodium roasting, the calcification roasting can avoid the production of waste gas and the sodium free tailings can be used for iron …
Ti-magnetite observed in different stages of martitisation is the primary oxide mineral together with exsolved ilmenite and spinel. No disorete vanadium-bearing mineral is observed. Vanadium is present as (a) partial substitution for Fe 3+ in magnetite, and (b) in the form of VFe 2 O 4, similar to TiFe 2 0 4 (ulvosphinel). The sulphide phase is ...
The global Vanadium Titano-Magnetite Mining market size is expected to reach US$ million by 2029, growing at a CAGR of % from 2023 to 2029. The market is mainly driven by the significant applications of Vanadium Titano-Magnetite Mining in various end use industries. ... 10.5.3 DE SHENG GROUP Vanadium Titano-Magnetite Mining Sales, …
China Vanadium Titano-Magnetite Mining Company Limited. Address: 5th Floor, Standard Chartered Bank Building, 4-4A Des Voeux Road Central, Hong Kong. Email: [email protected] Cornerstones Communications Ltd. Address: Unit 2102, 21/F., Overseas Trust Bank Building, 160 Gloucester Road, Wanchai,
The release of V from vanadium titano-magnetite, a predominant natural source of V, was studied under light irradiation. The release rate of V from vanadium titano-magnetite was accelerated by light irradiation, and the oxidation of V was detected. The essence of the photopromoted release of V is th …
Many technologies exist for the treatment of titaniferous magnetites that contain vanadium. Each process is designed based on the relative amounts of titanium, vanadium and iron. In some cases, steelmaking is the primary purpose followed by the secondary recovery of vanadium. In others, the vanadium is the main product. This paper presents a review …
ABSTRACT. In this study, a new vanadium extraction process from vanadium titano-magnetite(VTM) featuring calcification roasting and (NH 4) 2 C 2 O 4 solution leaching …
Experiments were carried out by adding CaF 2 as catalyst in a Ar atmosphere to study the isothermal reduction kinetics of vanadium titano-magnetite carbon composite pellets under high temperature in the range from1473 to 1673K. By analyzing reduction mechanism, it was found that the rate controlling step was gas diffusion, and the …
The main products of vanadium-titanium magnetite beneficiation are titanium iron concentrate (iron ore) containing about 50% of titanium in V-Ti magnetite, ilmenite concentrate containing about 50% of titanium, and cobalt sulfide concentrate [1,2,3,4].Titanium iron concentrate is mainly used for iron making through blast furnace …
Blast furnace–basic oxygen furnace (BF–BOF) process is the predominant method for smelting vanadium titano-magnetite (VTM) in China. Hydrogen-rich (H2-rich) gas injection in BF is considered as an important way to reduce CO2 emission under the background of low carbon metallurgy. In this paper, the softening–melting behaviors of VTM sinter in …
Numerous studies have focused on the reduction thermodynamics of ordinary iron ore; by contrast, the literature contains few thermodynamic studies on the gas-based reduction of vanadium titano-magnetite (VTM) in mixed atmospheres of H 2, CO, H 2 O, CO 2, and N 2.In this paper, thermodynamic studies on the reduction of oxidized VTM pellets were …
Natural iron minerals and zero-valent metals have been widely tested as catalysts for the Fenton-like process, but the systematical comparison study about their catalytic performance was rarely conducted, and the risk of the secondary pollution of toxic heavy metals was still not uncertain. In this paper, a comparison study of applying pyrite, …
The results show that vanadium emissions increased by 86% from 1949 to 2005 to a historical peak value and then gradually decreased to 12.9 kt in 2017, and the comprehensive evaluation by incorporating contrastive analysis, Monte Carlo approach, and GEOS-Chem simulation shows thatVanadium emissions estimated in this study were …
Methods of chemical analysis, XRD, and pH monitoring are adopted in order to study wet extraction of Fe, V and Ti based on activated reduction, and the control conditions as well as the degree of recovery are determined. The primary-leaching in NaHCO 3 saturated solution followed by final-leaching via carbonization is possible, and the leaching ratio for …
China Vanadium Titano-Magnetite Mining Company Limited is a Hong Kong-based investment holding company principally engaged in mining and ore processing, sale of self-produced products, trading of coals and steels, management of strategic investments and providing specialist mining services.
1. Introduction. Vanadium titano-magnetite (VTM) is a polymetallic symbiotic iron ore primarily containing iron, vanadium, and titanium. Iron minerals and titanium-bearing minerals coexist closely, primarily in the form of the strongly magnetic titanium magnetite and weakly magnetic ilmenite; however, vanadium-bearing minerals are mostly …
Therefore, the recovery of vanadium from ilmenite and magnetite is important for the production of concentrates with high vanadium quality. Download: Download high-res image (558KB) Download: Download full-size image; Fig. 1. SEM-BSE images (left) of a polished thin section of the vanadium-titanium magnetite ore used in the study.
The release of V from vanadium titano-magnetite, a predominant natural source of V, was studied under light irradiation. The release rate of V from vanadium titano-magnetite was accelerated by light irradiation, and the oxidation of V was detected. The essence of the photopromoted release of V is that the immobile low valence V is transformed to the …
Recovering vanadium from vanadium titanium-magnetite (VTM) ore using (NH4)2C2O4 is a clean hydrometallurgical process, but the drawback is the low recovery and slow kinetics due to the formation ...
1. Introduction. Vanadium (V) and titanium (Ti) are important strategic metals, which are widely used in metallurgical industry, chemical industry, machinery manufacturing, battery, aerospace, etc. [[1], [2], [3], [4]].As a representative resource for extracting V and Ti, vanadium–titanium magnetite (VTM) is a polymetallic symbiotic mineral which primarily …
Reston, ia: US Geological Survey, 2017. [2] CHEN De-sheng, ZHAO Long-sheng, LIU Ya-hui, QI Tao, WANG Jian-chong, WANG Li-na. A novel process for recovery of iron, …
The oxidation behaviour and the phase and microstructure evolution of VTM (vanadium titano-magnetite) pellets were studied during thermal processing in order to optimise the production method for producing high-quality pellets. The oxidation tests showed that titanium magnetite and ilmenite in VTM began to oxidise at 500°C and 700°C, …
This is an essay in the field of mineral engineering. This paper summarizes the distribution of vanadium titanium magnetite in the world and its comprehensive utilization progress. vanadium titanium magnetite is a composite ore of iron, titanium and vanadium, which is also associated with chromium, gallium, scandium, cobalt, nickel, copper, platinum …