Oxalic acid is an eco-friendly leachant which can enhance vanadium selective separation from iron impurity. In this paper, the separation mechanism was systematically investigated. The mineral ...

The results showed that the TTM concentrate was reduced to iron and iron-titanium oxides, depending on the reduction time, and the reduction sequence at 1200 °C was suggested as follows; Fe 2. 75 Ti 0. 25 O 4 →Fe 2 TiO 4 →FeTiO 3 →FeTi 2 O 5. The reduction temperature played a considerable role in the reduction of TTM concentrates.

The primary function of the kiln is to remove oxygen from the iron sand to produce a partially reduced material with a suitable amount of carbon remaining for the smelter feed. A flux, typically calcite, is added prior to smelting to minimise the reduction of titanium ... vanadium and iron using hydrochloric acid at atmospheric pressure and ...

Bian et al. [22] investigated the separation efficiency of vanadium, titanium, and iron from vanadiumbearing titanomagnetite carried out by pressurized pyrolysis of ammonium chloride-acid leaching ...

Panzhihua Steel Plant adopts a new process - "rotary hearth furnace (RHF) direct reduction - electric arc furnace (EAF) deep reduction" - to manufacture iron, and the resultant Ti-bearing slag contains 44.03% titanium dioxide and has higher contents of impurities such as calcium, magnesium and silicon, so it cannot be prepared titanium …

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The results shows that: the use of magnetic separation process can successfully separate metallized pellets, and obtain vanadium titanium micro-alloy iron powder and ti-enriched slag; suitable ...

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 …

@article{Hu2017SeparationAR, title={Separation and recovery of iron impurity from a vanadium-bearing stone coal via an oxalic acid leaching-reduction precipitation process}, author={Pengcheng Hu and Yi-min Zhang and Tao Liu and Jing Huang and Yi-zhong Yuan and Yadong Yang}, journal={Separation and Purification …

Separation and Recovery of Vanadium from Synthetic Leach Liquor Solutions Containing Iron, Calcium, Sodium, Aluminum, and Manganese by the Solvent Extraction Technique. ... Solvent extraction and separation of vanadium from other associated metals such as Ca, Na, Fe, Mn, Al from sulfate solutions using various …

However, the concentrations of vanadium and iron were 1777.5 ppm and 6552.5 ppm, respectively, in the OLVS. By adopting reduction precipitation, 83.8% of the iron was precipitated as FeC 2 O 4 ·2H 2 O with only a 2.5% vanadium loss when an iron powder dosage was 2.5 times that of the stoichiometry for 90 min at 25 °C.

Effect of magnetic intensity on separation of vanadium, titanium and iron. In this study, magnetic separation was used to obtain high-quality vanadium concentrates from the VTM ore. The production of titanium-rich concentrates to recover titanium was also very important because the VTM ore contains high ilmenite [26, 27]. Therefore, from the ...

The results showed that the effective selective separation of vanadium, iron and titanium could be obtained in which 97.39% V and 88.62% Fe were dissolved into the solution and over 91.76% Ti was ...

In this work, a cleaner and effective method for selective extraction of iron from vanadium slag was developed, including carbothermal reduction of iron from vanadium slag, chlorination of reduced slag, and electrolysis of chlorinated slag. In the reduction process of vanadium slag, the influence of temperature and C/slag mass ratio …

During the smelting of vanadium titanomagnetite, Ti(C,N) particles are formed if titanium oxides are over-reduced, and this increases the slag viscosity which creates problems in the separation of ...

The direct reduction iron with 91.06% of iron, and 1.60% of TiO 2 was obtained with recovery of 97.27% of iron. Yu et al. [46] studied the effect of coal slime on the separation of titanium and iron from beach titanomagnetite with 51.85% iron and 11.33% TiO 2 in reduction roasting.

Petcoke is a solid carbon-rich residue produced during petroleum refining. Petcoke mineral matter is rich in vanadium that, when alloyed with other metals, can significantly improve its properties. Vanadium extraction from steel slags is well studied, while extraction from secondary sources such as petcoke is not well understood. …

The beneficiation of this kind of ore generally uses weak magnetic separation to separate the vanadium iron concentrate, ... etc., and the heavy sand minerals are in a fine-grained state; the gangue is mainly silicate minerals. The combined process of gravity separation, magnetic separation and electric separation is adopted in production. The ...

Titaniferous magnetite hard rock deposits are common throughout the world. Previously they have been processed to recover vanadium using the standard salt roast process, however the economics based on vanadium alone can be marginal due to the high CAPEX and OPEX, making it vulnerable in a volatile vanadium market. New Zealand Steel and …

The maximum separation factor of vanadium and nickel was 32.78 at pH 3.0, and the extraction efficiencies of vanadium and nickel were 92.56% and 27.51%, respectively. Figure S1-c shows the influence of Cyanex 272 on the extraction efficiency and separation factor of vanadium and nickel at different initial pH. Nickel was difficult …

A new and simple method for extraction and spectrophotometric determination of vanadium has been described. Iron has been removed from the sample solution by its prior extraction with MIBK from concentrated HCl medium(~6M). Vanadium has been determined in the form of a colored complex with 2,3-dihydroxynaphthalene after its extraction into MIBK.

@article{Zishuai2020SeparationAR, title={Separation and recovery of vanadium and iron from oxalic-acid-based shale leachate by coextraction and stepwise stripping}, author={Liu Zishuai and Jing Huang and Yi-min Zhang and Tao Liu and Pengcheng Hu and Hong Liu and Qiushi Zheng}, journal={Separation and Purification …

Presently, there are many research studies on vanadium-titanium magnetite in China, most of which first adopt a single process of low-intensity magnetic separation to separate strong magnetic iron minerals such as titanium magnetite and ferrous magnetite (which contain the concentrates of vanadium and titanium), followed by gravity …

Section snippets Properties of the raw material. The extracted vanadium tailings were obtained from a steel company in China, and their chemical composition is displayed in Table 1, showing 41.32 % Fe 2 O 3, 8.99 % Na 2 O and 6.38 % Cr 2 O 3.The mineral composition and microstructure analysis revealed that hematite (Fe 2 O 3) was …

The smelting-separation process for metallized pellets of vanadium-bearing titanomagnetite concentrates was studied. The influences of smelting temperature, smelting time, and the basicity of the metallized pellet on vanadium and iron recovery were investigated. The characteristics of titanium slag were analyzed using X-ray diffraction, …

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Calcium vanadate (CaV2O6), a new product of vanadium precipitation, was obtained from vanadium slag by sodium roasting-water leaching and calcium precipitation. The separation behavior of vanadium and silicon in vanadium slag during sodium roasting and water leaching was systematically studied, and micro-morphology …

A co-recovery process used to extract iron, chromium, and vanadium in the form of chromium–vanadium-bearing metallic iron from vanadium tailings via a semi-molten reduction-magnetic separation ...

Therefore, our present work is dedicated to realize the deep separation and clean recovery of low valence vanadium, iron and chromium in the leaching solution of vanadium slag. A complexation method is proposed, which uses DDTC as a complexing agent to selectively precipitate vanadium and iron, separates them from chromium, …

The best separation of vanadium and iron using selected extractants were achieved when vanadium and iron species were either both reduced (vanadium (IV) and iron (II)) or both oxidized (vanadium (V) and iron (III)). For vanadium (V), it was shown that acid extractants had poor selectivity for vanadium (V) over iron (III); however, …