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Vanadium slag (VS) is a by-product of vanadium titanium magnetite BOF steelmaking process and becomes an important material for vanadium products preparation. Sodium roasting-water leaching is a mainstream process for industrial production, but the water leaching residue (WLR) usually remains 1.0 wt% to 3.0 wt% V …Web
Vanadium-containing titanium magnetite is the main source of V and Ti in the internal market. About 75% Fe, 82% V, and 44% Ti pass into iron concentrate during ore enrichment [].Therefore, the question of how to improve comprehensive utilization of vanadium-titanium magnetite concentrate (VTMC) is of decisive importance for the …Web
The separation of titanium, vanadium and chromium in vanadium slag (VS) is a difficult problem restricting the comprehensive utilization of VS. This paper presents the first study on the separation of titanium, vanadium and chromium from oxalic acid leachate of VS. Firstly, the separation of titaniu …Web
Therefore, a novel smelting process (Fig. 1) of vanadium-bearing titanomagnetite is being developed, in which the technologies of vanadium extraction using chloride waste, direct reduction, melting and separation of slag–metal at elevated temperature for comprehensive recovery of vanadium, titanium and iron were used …Web
The separation of titanium, vanadium and chromium in vanadium slag (VS) is a difficult problem restricting the comprehensive utilization of VS. This paper …Web
This problem can be possibly solved by proposed high temperature reduction–magnetic separation process, in which, V, Cr and Fe can be recycled as ferroalloy. The thermodynamic calculation results reveal that a higher temperature (>1127.8 °C) promotes the reduction of Fe, V and Cr, and improves the recovery rates of V and Cr …Web
A novel process for the extraction of iron, titanium, vanadium, and chromium from high-chromium vanadium-bearing titanomagnetite concentrates is proposed. This process involves several steps: partial reduction of the concentrates, magnetic separation, hydrochloric acid leaching of the titanium-bearing tailing, and alkaline desilication of the ...Web
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 …Web
In this work, the preparation of rutile TiO 2 from vanadium slag was investigated. This novel process achieved the transformation of Ti in vanadium slag to a …Web
This paper presents the first study on the separation of titanium, vanadium and chromium from oxalic acid leachate of VS. Firstly, the separation of titanium from the leachate by …Web
Reduction roasting with sodium sulfate followed by magnetic separation was investigated to utilize vanadium tailings with total iron grade of 54.90 wt% and TiO2 content of 17.40 wt%. The results show that after reduction roasting–magnetic separation with sodium sulfate dosage of 2 wt% at roasting temperature of 1150 °C for roasting time of …Web
The recovery and separation of vanadium and chromium from vanadium-containing chromate solution are necessary and valuable for the comprehensive utilization and environmental protection of V-Ti-bearing magnetite ore. ... where they are associated with titanium, iron, cobalt, nickel, and platinum group metals [1], [2]. The current …Web
Optimal roasting conditions for iron/slag separation were achieved with a mixture thickness of 42.5 mm, a roasting temperature of 1200°C, a residence time of 2 h, a molar ratio of C/O of 1.7, and a sodium carbonate addition of 70wt%, as well as with the use of anthracite as a reductant. ... The total recoveries of iron, vanadium, and titanium ...Web
This paper proposes a new technique for preparation of high-grade titanium slag from Panzhihua vanadium titanomagnetite concentrate by reduction–melting–magnetic separation processing. Chemical analysis, x-ray diffraction, and scanning electron microscopy in conjunction with energy-dispersive spectroscopy …Web
Ultimately, about 88% V and 81% Ti were recovered, when vanadium slag was roasted at 663.15 K with a 1:5 ratio of slag-to-NH4HSO4 and followed by 8 vol.% H2SO4 leaching. Cont.Web
The separation efficiency between Ti and Fe under various reduction conditions was characterized by the Fe/Ti molar ratio of the leaching residue and presented in Fig. 3. ... ZHAO Long-sheng, LIU Ya-hui, QI Tao, WANG Jian-chong, WANG Li-na. A novel process for recovery of iron, titanium, and vanadium from titano- magnetite …Web
Abstract. The separation of titanium, vanadium and chromium in vanadium slag (VS) is a difficult problem restricting the comprehensive utilization of VS. …Web
Zhao Longsheng et al. used the rotary kiln pre-reduction-electric furnace method to treat vanadium-titanium magnetite, separated iron, vanadium and titanium efficiently, and enriched titanium into slag …Web
Vanadium-bearing titanomagnetite ore is an important mineral resource containing vanadium, titanium, and iron . It is widely distributed around the world mainly including China, Russia, America, and North Africa [].Especially in the Panxi region of China, the proven deposits account for more than 90% of total reserves in China [2, 3].At …Web
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 …Web
The fact that scandium and the other REE do not form chloride complexes represent an option for separation of REE from elements that form such complexes. Summing up, scandium is a member of the REE but is not always found together with the other REE. Instead, we find scandium in minerals containing aluminium, titanium, …Web
Generally, vanadium‑titanium magnetite concentrate including Fe of 30%, TiO 2 of 10%, and V 2 O 5 of 0.3% is smelted by using blast furnaces. Metal iron is separated from titanium by gravity sedimentation, and titanium components are enriched in blast furnace slag (22–25% TiO 2). In china, over 3 million tons of the slag is produced …Web
Thus, the selective separation of chromium and vanadium is essential for ensuring the quality of the vanadium product and improving the resource utilization, environmental effect, and process economy of the vanadium-titanium industry. As the main ionic forms of vanadium and chromium, V(V) and Cr(VI) have similar physicochemical …Web
To recover iron, titanium, vanadium and chromium from vanadium bearing titanomagnetite, a process of direct reduction has been proposed. After magnetic separation, a material containing titanium, … ExpandWeb
The results show that more than 96 % of scandium and vanadium could be leached by using HCl with many aluminum, iron and few titanium and silicon from red mud. More than 97 % of vanadium and scandium was extracted by solvent extraction with mono(2-cthylhexyl)2-cthylhexyl phosphonate (P507), but few other elements from the …Web
Vanadium, titanium and iron appear efficient separation from VBT ore. • The secondary chlorination of HCl gas promote the extraction of valuable metals. • High …Web
Source separation of vanadium over iron from roasted vanadium bearing shale during acid leaching via ferric fluoride surface coating. J. Clean. Prod. ... titanium, vanadium, and chromium from high-chromium vanadium-bearing titanomagnetite concentrates. Hydrometallurgy, Volume 149, 2014, pp. 106-109.Web
the separation of titanium, vanadium and chromium from oxalic acid leachate of VS. Firstly, the separation of titanium from the leachate by hydrothermal method was studied. The results show that more than 99% of titanium in the leachate was precipitated in the form of spherical anatase TiO2 with the purity of 95.7%. Then, the …Web
The proposed magnetic roasting technology provides a new idea and method for the separation of vanadium and titanium from hematite containing vanadium and …Web
The acid leaching solution containing vanadium was obtained by sulfuric acid leaching or hydrochloric acid leaching, which could also contain a certain amount of metal impurity ions needing to be separated and purified. 1,17,18 At present, the solvent extraction process was a usual mature method for the separation and purification of vanadium ...Web
Bian et al. investigated the separation efficiency of vanadium, titanium, and iron from vanadium-bearing titanomagnetite carried out by pressurized pyrolysis of ammonium chloride-acid leaching-solvent extraction process. The observed leaching rates of iron, vanadium, and titanium were 92.5%, 95.1% and 1.2%, respectively. ...Web
Under optimized conditions, after melting separation, the recovery rates of iron, titanium, vanadium, and chromium were 97.9, 89.8, 96.7, and 97.8%, respectively. Furthermore, the melting separation mechanism was determined. The separated iron is a clean raw material for steelmaking and the Ti-rich slag can send for further processing to ...Web
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 ...Web
