The steadily growing demand for non-ferrous metals, a shift to heavier crude oil recovery and tightened environmental standards have increased the importance of heavy petroleum feedstock (HPF) as a raw source of metals. This paper reviews the recent developments in the recovery of vanadium and nickel from HPF. During crude oil …
The effects of basicity and MgO content on reduction behavior and separation of iron and slag during smelting vanadium titanomagnetite by electric furnace were investigated. The reduction behaviors affect the …
The initial characterization confirmed the presence of nickel (0.5–0.9% Ni) in the ore, which led to the interest in smelting the ore to obtain nickel in the metal. The smelting behaviour of the tailings is studied under the submerged arc furnace and blast furnace condition, under varying basicity. A cost economic analysis of the process is ...
The use of CVS in amounts up to 44 kg/ton made it possible to increase the vanadium content of the pig from 0.497 to 0.638% while keeping L V at the usual level (80–82%). An increase in the percentage of CVS in the charge leads to a moderate increase in the manganese content of the pig. There is almost no change in the concentrations of the ...
A novel method for CO 2 injection direct smelting vanadium steel (CIDSVS) is proposed. Achieving selective oxidation of phosphorus is essential for the applicability of the suggested process. Under the guidance of thermodynamics, the mechanisms of CO 2 injection dephosphorization and vanadium retention were investigated with CO 2 flow …
An innovative method for recovering valuable elements from vanadium-bearing titanomagnetite is proposed. This method involves two procedures: low-temperature roasting of vanadium-bearing titanomagnetite and water leaching of roasting slag. During the roasting process, the reduction of iron oxides to metallic iron, the sodium …
Unlike other metals such as copper, nickel or zinc, vanadium does not form concentrated deposits. Owing to the similarities between the V 3+ and Fe 3+ cations, vanadium is often found as a minor ...
It took thousands of years of technological advances before civilizations developed iron smelting, ... Steel is made from iron by removing impurities and adding substances such as manganese, chromium, nickel, tungsten, molybdenum, and vanadium to produce alloys with properties that make the material suitable for specific uses. Most …
Vanadium, nickel, and copper are simultaneously leached with maximum recoveries of 74%, 95%, and 88%, respectively, using optimum parameters; including Fe 2+ concentration of 2.6 g l −1, pH of 1.3, S/L ratio of 0.01 (w/v). After bioleaching step, Ni and Cu are separated from the leachate liquid by raising its pH up to 9–10 using NaOH.
This paper explores the suitability of DC plasma smelting as part of a wider flowsheet with feed preparation and aluminothermic reduction techniques for smaller-scale extraction operations based on this important niche secondary source of these key metals. Keywords. Plasma smelting; … See more
More attention should be paid to soil V pollution and potential hazardous surrounding the stone coal smelting district. Key words: vanadium; soil pollution; mobility; microbial response; stone coal smelting district 1 Introduction Vanadium (V) is a ubiquitous trace element and the average content of V in soil of the world has been established ...
The studied vanadium smelting plant is located in Panzhihua City (South Sichuan Province, China), which is the most famous base of vanadium-bearing titanomagnetite in China. ... Expression changes in metal-resistance genes in microbacterium liquefaciens under nickel and vanadium exposure. Curr. Microbiol., 74 …
Abstract Flash smelting and flash converting are mature technologies in copper and nickel sulfide smelting. The sensitivity of operation concerning the furnace design is evident. It is obvious that when two unit operations are carried out in separate spaces in the same furnace, skills related to maintenance of suspension oxidation of fine …
The mined ores (1–4% Ni) are processed to upgrade the metal content with 10–20% Ni in the concentrates. Thus, the preconcentration of nickel ores is an important unit operation to upgrade the nickel before commencing any extraction steps. Ni is mined from sulfide ores, Nickel ferrolaterite and serpentine.
The content of nickel in the hair of smelting workers was significantly higher than of workers in other professions (18.1 and 7.6 ... Nickel, vanadium and lead are included among the most harmful metals, although suggestive evidences exist for others, such as zinc [113].
Based on the mineralogical feature, we proposed using the scrubbing–desliming and flotation process to enrich vanadium, nickel, and …
Testwork carried out at the 40 kW scale, using pre-treated flyash, indicated the feasibility of producing a ferrovanadium alloy containing more than 15% vanadium and 6% nickel, with vanadium recovery of more than 89%, and a disposable slag based on USA EPA safe disposal criteria. Several parameters were studied in order to optimise the …
Vanadium and nickel recoveries to the alloy phase were calculated based upon: (i) slag masses and analyses (V-slag, Ni-slag), and (ii) metal masses and analyses …
The occurrence states of vanadium, nickel, and molybdenum in stone coal in differ-ent regions are complex and diverse, and the combined beneficiation and smelting pro-cesses used to extract them also vary. According to the literature, vanadium in stone coal mainly exists in the form of V3+ in minerals such as muscovite (KAl …
DOI: 10.1016/S1003-6326(15)63727-X Corpus ID: 135926921; Soil vanadium pollution and microbial response characteristics from stone coal smelting district @article{Xiao2015SoilVP, title={Soil vanadium pollution and microbial response characteristics from stone coal smelting district}, author={Xi-yuan Xiao and Miao Yang …
Vanadium, nickel, and copper are simultaneously leached with maximum recoveries of 74%, 95%, and 88%, respectively, using optimum parameters; including Fe 2+ concentration of 2.6 g l −1, pH of …
Nickel concentrates may be leached with sulfuric acid or ammonia, or they may be dried and smelted in flash and bath processes, as is the case with copper. Nickel requires higher smelting temperatures (in the range of 1,350 °C [2,460 °F]) in order to produce an artificial nickel-iron sulfide known as matte, which contains 25 to 45 percent nickel.In the next …
Reduction–sulfurization smelting is an effective method for treating solid hazardous waste and recovering valuable components from them. In this work, a waste hydrogenation catalyst (WHC), an automotive exhaust purifier waste catalyst (AEPWC), a vulcanizer, and laterite nickel ore were mixed, and the reduction smelting behavior of …
Zhang et al. reported that nickel, molybdenum, and vanadium can be selectively recovered from the spent Ni–Mo–V/Al 2 O 3 catalysts by using a two-step ammoniacal leaching process (Zhang et al., 2020). Molybdenum and nickel were simultaneously extracted by ammoniacal liquor of pH 9 with a leaching efficiency of …
The effect of nickel oxide additive on the smelting behaviors of chromium-bearing vanadium titanomagnetite pellets (CVTP) was investigated while analyzing the transfer behavior of nickel in iron ...
Abstract: The effect of nickel oxide additive on the smelting behaviors of chromium-bearing vanadium titanomagnetite pellets (CVTP) was investigated while analyzing the transfer behavior of nickel in iron and slag. The results show that when NiO added to CVTP increases from 0 to 6 wt.%, softening start temperature increases from 1148 to 1212 C ...
Reduction smelting can also be applied to recover valuable metals in spent petroleum catalysts. Nickel, molybdenum, and vanadium from spent petroleum catalysts have been recovered in the form of Fe–V and Fe–Ni–Mo alloys, respectively, by reductive smelting and oxidation processes at 1800–2000 °C (Pak et al., 2019).
The effects of MnO on the electric furnace smelting of vanadium titanomagnetite pre-reduced pellets were systematically studied in this study. The results indicated that MnO addition could reduce the titanium slag viscosity. ... Effect of nickel oxide additive on smelting mechanism of chromium-bearing vanadium titanomagnetite …
On the basis of theoretical analysis, a new clean metallurgical process with two steps of alkaline-reduction smelting and water leaching was proposed to recover Mo and Ni from nickel-molybdenum ...
The smelting experiments demonstrate that the vanadium content in iron and the recovery rate of vanadium in pig iron increase as the CaO content, MgO …
The occurrence states of vanadium, nickel, and molybdenum in stone coal in differ- ent regions are complex and diverse, and the combined beneficiation and smelting pro- cesses used to extract ...
The invention discloses a method for recovering nickel and vanadium from waste FCC catalyst by reduction smelting, which comprises the following steps: adding a reducing agent, a collecting agent and a fluxing agent into the waste FCC catalyst and uniformly mixing to obtain a mixed material to be smelted; reducing and smelting the mixed …
desliming and flotation process to enrich vanadium, nickel, and molybdenum. Our preliminary experiments obtained two products: vanadium–molybdenum-rich sludge and …
