Red mud, which could cause numerous problems to the environment, is a hazardous waste generated from the alumina smelting industry. In general, the storage and harmless utilization of red mud are hard to implement due to its fine particle size and high alkalinity. This study put forward a novel process to separate iron (MgFe2O4) and …
PDF | Extraction,Titanium dioxide, Building brick, Red mud | Find, read and cite all the research you need on ResearchGate
Semantic Scholar extracted view of "Solvent extraction of titanium(IV) from sulfuric acid solution with Cyanex923 and its application in leach liquor of red mud" by Dan Zou et al. ... A two-stage extraction process was proposed to recover sulfuric acid and vanadium from simulated acid solution and titanium dioxide waste acid (TDWA).
In the keyword word frequency heat map (Fig. 1 (a)) and its co-occurrence relationship charts(Fig. 1 (b)), various industrial by-products, such as bauxite slag, red mud and titanium dioxide waste liquid had been in concern of the researchers as the sources of scandium [24], [25], the extraction of scandium mainly focused on the leaching of ...
Sulfuric acid is the most applicable acid for hydrometallurgical extraction of titanium dioxide from red mud because titanium dioxide can react with sulfuric acid to produce soluble TiOSO 4 (Zou ...
1. Introduction. Red mud (RM) is a solid waste generated by alkali (NaOH) leaching of bauxite by the Bayer process for alumina production [].More than one ton of RM is produced for one ton of alumina (Al 2 O 3), and over 150 Mt of RM is annually stored in landfills and sea [].The RM utilization degree is extremely low due to the high Na, Al, Si, …
Sources with extraction value include red mud, titanium white waste acid, titanium chlorination residue, rare earth ore slag, laterite ore slag, and wolframite residue. ... Recovery of scandium from spent sulfuric acid solution in titanium dioxide production using synergistic solvent extraction with D2EHPA and primary amine N1923.
Titanium is the ninth most abundant element and constitutes approximately 0.6% of the earth's crust [].It is resistant to corrosion, exceptionally light and extraordinarily strong, weighing 60% of steel by volume [].Due to these properties, this metal is used to manufacture parts of airplanes, spaceships, missiles and ships [].In addition, the …
The general extraction method of scandium in red mud is. as follows: sodium bicarbonate leaching, reduction smelt-. ing-acid leaching, alkali fusion-acid leaching, acid leaching, .and so on ...
The most suitable acid for the extraction of titanium dioxide from red mud is sulfuric acid because titanium dioxide can react with sulfuric acid to form soluble TiOSO 4 [16,114]. However, to enrich …
Extraction of the REEs was high for leaching in HCl solutions compared to other acids, but the dissolution of iron was high as well (∼60%). The maximum extraction of the REEs was around 80%. Sodium and calcium were completely dissolved during leaching. Dissolution of aluminum, silicon and titanium was between 30% and 50%.
Red mud is a polymetallic waste generated during Bayer's process of alumina production. High alkalinity (pH > 11), multiple elements, and micron-sized particles make red mud recycling energy-intensive and challenging. The following work presents a hydrometallurgical flowsheet for separation of different red mud elements and recovery …
Red mud is the main solid waste generated by the aluminum industry for the extraction of alumina. Considering the environmental problems associated with red mud, the recovery of iron from bauxite slag is still a promising field. The effect of sodium sulfate on the red mud separation roasting-magnetic separation process was studied.
Fig. 2 presents the particle size of red mud. It can be seen from that the average particle size is 23.94 μm, and 60% less than 100 μm with a specific surface area of 2500 cm 2 /g. Mineral phases and distributions of iron, aluminum and titanium in the phases in red mud are listed in Tables 2 – 4, respectively.It can be seen from that iron, …
While red mud is a major problem, it also contains a variety of metals that could be extracted. Some estimates say that red mud can contain as much as 64% Iron oxide (Fe 2 O 3), 43% aluminum oxide (Al 2 O 3), and 24% titanium dioxide (TiO 2),² though it's important to note that the composition of red mud varies significantly across sources.
In addition, the red mud also contains scandium, titanium, vanadium, yttrium, and other rare metals, so the extraction of these valuable components from red mud by acid leaching has been widely ...
DOI: 10.1016/J.HYDROMET.2021.105724 Corpus ID: 238689020; Recovery of scandium from red mud by leaching with titanium white waste acid and solvent extraction with P204 @article{Zhou2021RecoveryOS, title={Recovery of scandium from red mud by leaching with titanium white waste acid and solvent extraction with P204}, author={Jie Zhou and …
Bauxite residue, known as red mud, is a by-product of alumina production using the. Bayer process. Currently, its total global storage amounts to over 4.6 billion tons, including about. 600 ...
A feasible approach to selectively recover iron and rare earth elements (REEs) from red mud through acid leaching-coordination-solvent extraction was proposed. The leaching efficiencies of Fe, Al, Ti, Sc, La, Ce, Nd and Y can reach up to 95.9%, 82.1%, 68.3%, 93.3%, 82.3%, 96.9%, 98.3% and 95.6%, respectively, under the …
As well as pure Fe extraction, the presented hydrogen-plasma-based reduction process of red mud also seems to be a feasible method to extract other metals, such as Ti, confirmed by the discovery ...
In particular, it is of great significance to develop new separation process (technology) of scandium from red mud, titanium dioxide and rare earth smelting process. Recommended articles. References. 1. M.H. Chhatre, V.M. Shinde. ... Extraction of scandium from red mud by acid leaching with CaF 2 and solvent extraction with P507. …
Abstract. The extensive utilization of red mud is an urgent problem for the worldwide alumina plants, and the extraction of titanium from the red mud is especially difficult. The extraction of perovskite from a red mud alkaline leaching slag (by using acid leaching), in addition to its photocatalytic reduction of CO 2, have been investigated in ...
D. Luo and J. Liu, New process of utilizing red mud from aluminum treating plant to produce high quality direct-reduction iron, China Mining 11 (2002), pp. 50–53 (in Chinese) Recovery of titanium dioxide, vanadium, rare earths. Bibliography. F. Vilem, "Production of Vanadium Slag from Bauxite Red Mud," Technical Digest, pp. 443-44, (1967)
The transition from rutile to ferrouspseudobrookite of the major phase in slag contributed to this change. 93.6 wt.% of iron element can be recycled in the form of industrial pure iron as the pre-reduced red mud was smelted at 1600℃. All the titanium element can be recycled as Ti-rich material (with 55.91wt.% of TiO2) for titanium dioxide ...
Since the pre-reduced sample was smelted at 1600℃ for 60 min, 93.60 wt% of the iron element in red mud can be recycled in the form of iron nugget with grade of 99.6 wt%. Titanium in red mud can be recycled as Ti-rich slag, with TiO 2 content of 55.91 wt%, for titanium dioxide production. The FeO in slag also suppressed the side reactions (i.e ...
At present, the source of scandium is comprehensively recovered from titanium dioxide waste liquid, red mud (bauxite residue), tungsten acid slag, and so on, the production, and application of ...
In this work red mud, a highly alkaline waste product generated during alumina production process, was valorised as a source of valuable metals and as an adsorbent material. A hydrometallurgical process was developed in order to recover titanium from red mud. By a leaching step with hydrochloric acid followed by ammonia …
Study on scandium recovery from red mud with acid leaching [J]. Nonferrous Metals (Extractive Metallurgy), 2016(5): 36–38. (in Chinese) ZOU Dan, LI Hai-lian, CHEN Ji, LI De-qian. Recovery of scandium from spent sulfuric acid solution in titanium dioxide production using synergistic solvent extraction with D2EHPA and …
