Extraction of scandium and iron from red mud
Webother 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 aluminium, silicon and titanium was between 30 and 50%. The leaching data show a very close association of scandium with the iron oxide phases. WebSep 1, 2024 · The loss of scandium and titanium were 6.3% and 5.9%, respectively. Compared with the traditional extraction procedure of scandium in red mud, this method …
Extraction of scandium and iron from red mud
Did you know?
WebNov 10, 2024 · To tackle the REE supply challenge, new initiatives have been started focusing on their extraction from alternative secondary resources. This study puts the emphasis on technospheric mining of... WebJun 21, 2024 · As an alkaline solid waste, red mud allows the recovery of valuable metals such as iron, scandium, and titanium, alleviating resource shortages and simultaneously improving the environment. In the process of alkali dissolution of bauxite, iron, calcium, silicon, magnesium, titanium, scandium, and other elements are insoluble.
WebFeb 1, 2024 · High content of iron in red mud is the main hindering factor for the extraction of REEs from the solutions obtained by red mud acid leaching [28,29]. For this reason, the most promising way for comprehensive recycling of red mud is combined pyro- and hydrometallurgical methods with a recovery of iron by pyrometallurgical methods fol- Web1 day ago · Extraction of scandium from red mud by modified activated carbon and kinetics study. Rare Met, 27 ... Competitive adsorption of Cd(II), Pb(II) and Cu(II) ions …
WebFIELD: chemistry.SUBSTANCE: invention relates to extraction of scandium and rare-earth elements from red mud. Repulping of red mud is carried out at pH = 0.5-1. Pulp is subjected to mechanical activation, sorption leaching of scandium is carried out with an organic sorbent, whose pores are impregnated with a phosphoric ester. Sorbent before … WebAug 28, 2024 · The scandium extraction rate is greater than 98% at pH 2.54 and it decreases slightly with the increase of pH. Even at pH 0.35, the scandium extraction rate can still reach as high as 96.5%, whereas the iron extraction is almost zero, indicating that it is feasible to separate the scandium from Fe 3+ using P204 at low pH values.
WebFeb 1, 2024 · The extraction performances of Sc³⁺, Fe³⁺, Al³⁺, Si⁴⁺, Ca²⁺, and Na⁺ from synthetic leachate of sulfation-roasted red mud were first investigated using organophosphorus extractants...
WebLymperopoulou et al. investigated leaching of iron and scandium from red mud by sulfuric acid using a statistical analysis of the obtained data using the Taguchi method. In the … henry fight dsafWebOct 21, 2016 · It was observed that scandium extraction had a very close association with iron dissolution in the red mud (as shown in Fig. 3 a [ 93 ]), and about 50 % of the scandium in red mud could be recovered with … henry fillmore biographyWebRed mud is composed of a mixture of solid and metallic oxides. The red colour arises from iron oxides, which can comprise up to 60% of the mass. The mud is highly basic with a … henry filmWebAug 20, 2024 · Scientists have come up with several ways to purify scandium from red mud. Balomenos's group, for example, has shown it can use both sulfuric acid and … henry fillmore controversyWebMar 20, 2024 · Efficient selective extraction of scandium from red mud. Minerals Processing and Extractive Metallurgy Review. 2024; : 1-9. ... The extracted scandium, iron, and aluminium increased significantly in the first 1 h but did not change significantly with a further extension of the leaching duration. Increasing the temperature from 180 °C … henry filmerWebAug 14, 2024 · The proposed process is starting from red mud, recovering iron as pig iron and concentrating Sc in the resulting slag via smelting, followed by hydrometallurgical treatment of the separated... henry fightWebOct 19, 2024 · Red mud as the main byproduct generated during alumina extraction from bauxite. Owing to the high iron content in the red mud and the high correlation between … henry fildes dla piper