China, where most scandium is presently produced [8]. SGS Lakefield has also developed a solvent extraction process for scandium recovery from chloride solutions obtained by leaching niobium concentrate [9]. This study was part of the development work for Rio Tinto's first scandium recovery facility (demonstration plant) in Sorel-Tracy, Quebec.
اقرأ المزيد
The methods for titanium and scandium extraction from the aqueous solution consist of solvent extraction, ion exchange (Korovin and Shestak, 2009;Van Nguyen et al., 2016;Li et al., 2018) and ...
اقرأ المزيد
C22B3/06 — Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, ... Scandium recovery method PCT/JP2017/000601 WO2017130692A1 (en) : : Method for recovering scandium Publications (2) ...
اقرأ المزيد
Metallurgical processes for scandium recovery from various resources are reviewed. Scandium is mainly recovered as byproduct from residues, tailings and waste liquors in the prodn. of other metals such as rare …
اقرأ المزيد
Currently, the methods combined with hydro- and pyro-metallurgical processes, including ore pre-treatment, leaching, solvent extraction, precipitation and …
اقرأ المزيد
The paper by Kaya et al. details process development for recovery of scandium from Ni-Co HPAL leach solutions. As is normal practice, residual iron is removed from the PLS by addition of lime or other neutralising agents. This is normally conducted in two stages, the first at a pH of 2.7 with limestone and then at a higher pH of around 4.7 …
اقرأ المزيد
Scandium (Sc) became one of the key elements for advanced Al-based lightweight alloys due to major improvements in physical properties. Due to extreme prices and rare primary sources, recovery of Sc from available end-of-life (EoL) products has clearly became the focus of research. Al-Sc-containing 3D powders are one of …
اقرأ المزيد
In the process considered herein, an NH 4 F solution is used to strip Sc from the organic phase, and Sc is then recovered as (NH 4) 3 ScF 6 by crystallization. This intermediate product can be calcined at temperatures between 340 and 350 °C to obtain ScF 3 [ 23 ]. ScF 3 can be used for the direct production of scandium metal and Sc–Al …
اقرأ المزيد
US10190189B2 - Scandium recovery process - Google Patents Scandium recovery process Download PDF Info Publication number US10190189B2 ... scandium sediment dissolution post Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no ...
اقرأ المزيد
Thus, adsorption and ion exchange processes are preferred for recovery processes involving diluted aqueous waste streams and relatively extensive attention has been paid to these technologies over the last decade [7], [8], ... A strategy for selective recovery of scandium, as well as the rest of the REE concentrate from the AMD …
اقرأ المزيد
Metallurgical processes for aluminum, sodium, iron, titanium, vanadium, scandium and other valuable elements recovery from red mud are investigated in detail by subsequent sections. Some mechanisms and performance of solvent extraction involved in the extraction or stripping process are also reviewed in this paper.
اقرأ المزيد
The method showed scandium recovery to primary leach solution (PLS) of 87% for MET01, and 84% for MET02 samples. The recovery of total rare earth element, including yttrium (TREE+Y) of 84%, from ...
اقرأ المزيد
The leaching e ciency of scandium directly a ects the recovery of scandium extraction. Generally, the best leaching agent, the particle size of leaching material, solid-liquid ratio, leaching time and temperature should be determined according to the characteristics of slag system. Scandium oxide, a common compound of scandium in nature,
اقرأ المزيد
Scandium Recovery from Aqueous Solution by Adsorption Processes in Low-Temperature-Activated Alumina Products by Diana Daminescu 1, Narcis Duţeanu 1,*, Mihaela Ciopec 1, Adina Negrea 1, …
اقرأ المزيد
This scandium recovery process includes a washing step (S1) for washing a neutralization sediment (drainage sediment) and a dissolution step (S2) for subjecting the washed sediment obtained in the washing step (S1) to dissolution in an acid. It is preferable that the process further includes a re-dissolution step (S3) for subjecting a ...
اقرأ المزيد
For NaOH cracking process, the investigated operating parameters were baking temperature, NaOH-to-slag ratio, baking time, and liquid-to-slag ratio. After optimization, 88% of scandium was recovered, indicating the predictability of the empirical model for scandium recovery.
اقرأ المزيد
This study aims to fill this gap to assess the environmental impacts of the production of Sc 2 O 3, where the technical processes are modelled based on a recent project of Sc recovery from rare earths tailings in Bayan Obo mine. The environmental impacts of 5 major processes and 22 sub-processes involved in the beneficiation stage …
اقرأ المزيد
Since 2015, JX Nippon Mining & Metals has been developing a process for scandium recovery from the residue of a titanium -smelting process. The process …
اقرأ المزيد
Scandium is usually extracted by the high-pressure acid leaching (HPAL) process, followed by the concentration and separation of scandium from the pregnant leach solution by using the pH ...
اقرأ المزيد
Scandium recovery by adsorption onto GDAH-04-300 material is a spontaneous, endothermic physical process occurring at the interface of GDAH-04-300/solution containing scandium and whose …
اقرأ المزيد
The principle objective of this project was to develop a novel process flowsheet using low-temperature plasma treatment (LTP) integrated with conventional hydrometallurgical processes to recover rare earth elements (REEs), especially highly valued REEs (i.e. scandium and critical REEs), from coal and coal byproducts.
اقرأ المزيد
11 rowsScandium is commonly found in ores of other metals and recovered from their residues and tailings. ...
اقرأ المزيد
Recovering Scandium from Scandium Rough Concentrate Using Roasting-Hydrolysis-Leaching Process by Junhui Xiao 1,2,3,*, Yang Peng 1,3, Wei Ding 1,3, Tao …
اقرأ المزيد
Scandium is commonly found in ores of other metals and recovered from their residues and tailings. Various metallurgical processes of scandium recovery from various resources, such as ores of scandium, rare earths, uranium, aluminium, titanium, tungsten, nickel, tantalum and niobium are reviewed.
اقرأ المزيد
Recovery of scandium from various sources: A critical review of the state of the art and future prospects. Author links open overlay panel A.B. Botelho Junior a, ... In this study, a full process in recovery of titanium and rare earth elements (REEs) from the red mud was developed. The suggested route consists of four main stages in the …
اقرأ المزيد
Metals 2017, 7, 557 3 of 7 contact thermometer, and pH meter was used during the experiments. The pH of the second impurity removal and scandium precipitation experiments was adjusted and kept at 4.75 at 60 C for 3 h by adding CaCO3, MgO slurry (12.5 g/100 cc water), and Na2CO3 (12.5 g/100 cc water), 1 M NaOH solutions dropwise …
اقرأ المزيد
In this paper, we report on the second part of this process, i.e., the refining of an intermediate scandium product using solvent extraction. Solvent extraction is widely used in China, where most scandium is presently produced [].SGS Lakefield has also developed a solvent extraction process for scandium recovery from chloride solutions …
اقرأ المزيد
Kinetic modelling of scandium recovery in coordinates Bτ= f(τ). To define the contribution of chemical interaction into the scandium extraction process, recovery kinetics was quantitatively described using pseudo-first order, pseudo-second order kinetic models and Elovich equation in linearized form; their parameters are given in Table 1.
اقرأ المزيد
Metallurgical processes for scandium recovery from various resources are reviewed. Scandium is mainly recovered as by-product from residues, tailings and waste liquors in the production of other ...
اقرأ المزيد
The recovery of scandium (Sc) from wastes and various resources using solvent extraction (SX) was discussed in detail. Moreover, the metallurgical extractive …
اقرأ المزيد
Scandium Recovery from Aqueous Solution by Adsorption Processes in Low-Temperature-Activated Alumina Products Diana Daminescu 1, Narcis Du¸teanu 1,*, Mihaela Ciopec 1, Adina Negrea 1, Petru ...
اقرأ المزيد
3 rowsOne of the most popular approaches for scandium recovery from red mud applies hydrometallurgical ...
اقرأ المزيد
Imperial Mining Awarded $245,355 from the Quebec Government to Optimize its Crater Lake Scandium Recovery Process. February 08, 2022 08:30 ET | Source: Imperial Mining Group Ltd.
اقرأ المزيد
Titanium -smelting residue contains some scandium and several processes for its recovery have been studied [ 3 ]. No commercial process exists for scandium recovery from titanium smelter residues. The titanium -smelting -plant flowsheet is shown in Fig. 1. Titanium tetrachloride (TiCl 4) is produced by the chlorination of titanium …
اقرأ المزيد
Scandium recovery by adsorption onto GDAH-04-300 material is a spontaneous, endothermic physical process occurring at the interface of GDAH-04-300/solution containing scandium and whose kinetics are influenced …
اقرأ المزيد
A novel Cyanex923-N1923 synergistic extraction system was proposed for recovery of Sc. • The extracted complex formed because of N-H + ⋯O P and R max was calculated to be 2.20.. 95% stripping rate of Sc can be achieved by only 2 mol·L −1 HNO 3 solution.. The problem of Sc stripping difficulty can be solved well by the synergistic system.
اقرأ المزيد