The dumping of a large amount of steel slag not only wastes metal resources, but pollutes the ecological environment. In this study, a method for recovery of vanadium, titanium, iron, magnesium, and synthesizing anhydrite from steel slag is proposed. The leaching efficiency of V, Ti, Fe, and Mg was 99.42%, 99.36%, 99.89%, and 99.95%, …

A considerable number of investigations had been performed to obtain optimum technology for recovery of vanadium and chromium. The common methods for leaching out vanadium and chromium were ...

According to the results presented in the two-stage leaching, the vanadium recovery is above 75% with 80 g/l NaHCO 3 solution and approximately 70% with 60 g/l NaHCO 3 solution. Finally, according to our findings, the proposed flow sheet of vanadium recovery from slag with a high content of lime is illustrated in Fig. 12. The main result of …

spinel.9 Generally, most of the vanadium in con-verter vanadium slag is scattered in spinel as the isomorphic state with Fe, Mn and Cr. Traditional methods of recovering vanadium from converter vanadium slag are to roast the slag with sodium chloride at a high temperature to break the lattice JOM, Vol. 71, No. 12, 2019

Extraction of Vanadium from Vanadium Slag Via Non-salt Roasting and Ammonium Oxalate Leaching. Abstract A clean method featuring non-salt roasting followed by (NH4)2C2O4 leaching to recover vanadium from vanadium slag was proposed. The carcinogenic Cr6+ compounds and exhaust gases were….

In order to recover vana-dium from the hot metal, the duplex process was used, and then, vanadium in the hot metal was selectively oxidized into slag [8]. The vanadium slag produced contains about 6% CaO, while CaO content in the normal vanadium slag is less than 2.5% [9]. At present, the traditional method, i.e., sodium slats (usu-

A novel synergistic extraction method for recovering vanadium (V) from high-acidity chloride leaching liquor. Sep. Purif. Technol. (2016) ... Then, the extraction and stripping process parameters for recovering vanadium (V) in the filtrate were optimized, and the vanadium extraction and stripping efficiency reached more than 99.8% and …

When vanadium enters into the leaching liquor, solvent extraction is an effective method to separate and recover vanadium. The Hongge ores (the biggest vanadium-bearing titanomagnetite deposit in China) cannot be utilized effectively by using traditional blast furnace and direct reduction techniques [6], [7]. A novel cleaner process …

High-chromium vanadium residue (HCVR (HCVR: high-chromium vanadium residue)) is an important secondary resource of valuable metals such as vanadium (V), chromium (Cr), and molybdenum (Mo). The mainstream technology for the utilization of HCVR, the Na2CO3-assisted-roasting–water-leaching method, usually requires roasting …

•. Vanadium is recovered from VS-HPC as V 2 O 5 in purity as high as 99.7%. •. Vanadium in VS-HPC can be comprehensively utilized with a total recovery of 87.3%. …

ABSTRACT Vanadium is a strategic transition metal that has been extensively utilized in steelmaking, green chemistry, energy storage, and aviation industries, and the sustainable development of vanadium production industries is therefore of significant importance. In this review, the production of vanadium using primary …

In order to compare the two kinds of methods, Table 1 shows the main experimental parameters. As can be seen from Table 1, the maximum vanadium leaching efficiency is 46% in the published literature (Kim et al., 2012) by Jin-Young Lee. The vanadium leaching efficiency is 98% under the suggested leaching condition in this work.

= V, P, As) from spent Bayer liquor, making the recovery of vanadium from BVS more dif cult ( Healy, 2022 ; Meshram et al., 2014 ). Since BVS mainly consists of soluble sodium salt, various options

Fully oxidation roasting of vanadium slag are industrial methods to recover V(V) from vanadium slag, and discharges residue and wastewater containing highly toxic V(V) and Cr(VI). To avoid this, an environmentally friendly strategy for the direct recovery of low valence vanadium (LVV) from vanadium slag produced by selective oxidation …

In order to realize the resource utilization of spent hydrodesulfurization catalyst, a solvent extraction-oxalic acid precipitation process is studied in this paper for efficiently recovering vanadium, nickel, and aluminum from the acid leaching solution of spent hydrodesulfurization catalyst. The process conditions for extracting vanadium with …

Given that vanadium is a valuable material, the implementation of vanadium recycling processes is thus necessary to enhance the element's value chain as well as minimize its undesirable environmental consequences. Among various remediation methods available, a biological method based on microalgal adsorption is known to be …

Effect of air flow rate on the recovery of vanadium at 900°C (leaching conditions were ammonium carbonate concentrations of 30% by weight, S/L ratio of 4:1, temperature of 65 °C, time of 150 min ...

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 …

Vanadium chemicals, known as the "vitamins of the modern industry," are major resources widely used in the petroleum, steel, batteries and catalyst industry. Vanadium is also essential in biological systems. Here we review vanadium properties, mineral sources and recovery methods such as blank, sodium and calcium roasting, …

Abstract. An innovative method for recovering valuable elements from vanadium-bearing titanomagnetite is proposed. This method involves two procedures: …

Experimental Methods Experimental procedure. The gold-vanadium separation tests were performed following the flow-process chart diagram depicted in Figure 2.Principally, the oxide vanadium reacted with calcium chloride to generate soluble calcium vanadate and chlorine, elucidating the fundamental principle of the Au and V separation …

Prospect of Recovering Vanadium, Nickel, and Molybdenum from Stone Coal by Using Combined ... The sample analysis method was: scanning electron microscope high-vacuum mode, backscattered electron ...

Figure 3 showed that the volume ratio of H 2 O 2 -to-residue (VR) had a small influence on leaching efficiency of vanadium, which just increased from 86.62% to 98.60% with the increase in the VR ...

Solvent extraction is a promising method to recover vanadium from leaching solution of vanadium slag, because of its good selectivity, high extraction rate and strong regeneration of extractants (Chen et al., 2015). To further improve the leaching rate of vanadium slag, the extraction process of vanadium slag leaching solution has been ...

A clean method featuring non-salt roasting followed by (NH 4) 2 C 2 O 4 leaching to recover vanadium from vanadium slag was proposed. The carcinogenic Cr 6+ compounds and exhaust gases were avoided, and the water generated from vanadate precipitation may be recycled and reused in this new leaching process. The leaching …

However, the process of this method is too long, and the two−stage combined extraction deep impurity removal process has a high impurity removal efficiency and a low vanadium recovery efficiency, which is extremely unfavorable to industrial production. Download : Download high-res image (68KB) Download : Download full-size …

1. Introduction. As strategic metals, vanadium and chromium are used widely in various industries such as steel, metallurgy, aerospace and chemical engineering [1], [2].More than 88% of vanadium is extracted from vanadium slag which is obtained after smelting vanadium titano-magnetite [3], [4].In order to realize the transfer of vanadium …

In this study, an efficient utilization of vanadium titanomagnetite concentrate was systemically investigated through potassium pyrosulfate (K2S2O7) synergized with ammonium sulfate ((NH4)2SO4) cascade roasting to separate and recover vanadium, iron, and titanium. The result shows that 95.87% of vanadium and 80.13% of iron could be …

Chromium. Recycling. 1. Introduction. In modern industries, vanadium is used in various fields particularly in steel-making (92.9%), non-ferrous alloys (4.0%), chemical …

The ion exchange method can deeply remove metal ions such as vanadium and chromium in the solution, but the adsorption capacity of ion exchange resin is limited, which makes it difficult to recover the high concentration of vanadium in the leaching solution (Vinco et al., 2022). The chemical precipitation method is simple.