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Platina Scandium Project – Key Project Parameters: Way Forward – Platina Resources is currently progressing with Mining Licence Application (MLA), Environmental Impact Assessment, Development Applications (mine and process plant), as well as securing offtakes and financing for the project. On 9 May 2019, the company informed to have lodged ...
Based on leaching experiments of complex silicate ore contenting scandium, the research has adopted extraction to concentrate scandium and separate impurity. The emphasis of this reaserch is the impact factors, so the experiments including extractant concentration, organic aqueous ratio, mixing time, organic phase washing, organic phase reextraction, have been conducted.
Taking into account scandium limited availability coupled with its high demand in modern technology, bauxite residue could be considered as a potential resource for scandium recovery. In this study, the optimization of scandium extraction from bauxite residue .
Jul 02, 2015· A method for separating and refining scandium according to the present invention is a method for separating and refining scandium by selectively extracting the scandium from a solution produced by applying a leaching treatment to ores and intermediates containing the scandium using an acid solution or the like.
The scandium concentrate used in the leaching experiment was obtained from the rare earth ore containing scandium in Yunnan Province, the sample used in experiment is leaching liquid containing scandium which the content of scandium is 3.6g/t, with complex impurity composition. The main influencing factors of extraction in hydrochloric acid solution were acidity, mixing time, phase ratio etc ...
In this study, the optimization of scandium extraction from bauxite residue with sulfuric acid is investigated using Taguchi methodology. Based on previous studies, acid molarity, leaching time, solid/liquid ratio, and reaction temperature were selected as .
Review of the scandium assay data across the deposit shows that it is pervasively distributed at elevated grades (>180ppm scandium) throughout the lateritic profile, but generally preferentially around the periphery of the central dunite complex. The bulk of the scandium mineralisation is present within the OVB, TZ, and GZ.
Separation of cyclotron-produced 44 Sc from a natural calcium target using a dipentyl pentylphosphonate functionalized extraction resin. ... Despite the efforts of several research groups, the ideal 44 Sc production and separation ... consistent with the production of the scandium complex since these peaks were not present in the control vial ...
This research is concerned with the solvent extraction into chloroform of the lanthanides, using 2,5-dimethyl-2-hydroxyhexanoic acid (DMHHA). This acid is the first ..cap alpha..-hydroxy aliphatic acid to be studied as an extracting agent for the lanthanides.
A study was carried out for recovery of scandium from KOH sub-molten salt (SMS) leaching cake of fergusonite. Major metals in the cake were rare earths (RE), K, Th, U and Ca, and minor metals were Pb, Nb, Ta, Ti, Fe, Si, Sn, Al, Bi and Mn.
Due to the complex process for separation and purification of Sc from these ores, Sc is a kind of very expensive metals with high prices, which seriously obstructs its widely applications. As scandium and zirconium are commonly associated elements, Zr is a kind .
scandium(III) complex by the method of Muetterties and Wrieht 23 b. Precipitation of the tris (tropolonato) scandium(III) complex from aqueous solution 24 c, Precipitation of the tetrakis (tropolonato) scandium(III) complex from aqueous methanol medium 24 2. Thermal Studies 25 a. Thermogravimetry 25 b. Thermal reactions 25 3.
Based on the sample's composition, particle size distribution and the occurrence state of scandium, studies were conducted of the pre-concentration of scandium oxide from the low-grade magnetite ...
Research Highlights This paper comprehensively reviews the metallurgical processes to recover scandium from various sources. Residues, tailings and waste liquors in the production of other metals are the resources for scandium. The most promising scandium resources for its production are bauxite and nickel laterite ores. Combined hydro- and pyro-metallurgical processes are commonly used for ...
Scandium is concentrated in the dust during TiO2 chlorization. The dust can be used as a raw material from which Scandium is extracted. Scandium leaching conditions such as leaching acid concentration, liquid-solid ratio, leaching temperature and leaching time is investigated with chemical analysis through the orthogonal experiment. The results show that the optimum leaching conditions is ...
Extraction of Scandium (III) from acidic solutions using organo-phosphoric acid reagents: A comparative study Article (PDF Available) in Separation and Purification Technology · .
Jan 25, 2019· In the present study, the crystallization of an ammonium scandium fluoride phase by cooling and antisolvent crystallization techniques is presented. Cooling crystallization gave a low yield of ammonium scandium hexafluoride, (NH 4) 3 ScF 6, below 50% at the lowest temperature of 1 °C investigated. Antisolvent crystallization using ethanol gave ...
Jun 23, 2016· In the scandium extraction step, scandium values are extracted from a scandium source with an organic solvent, thereby obtaining a scandium-loaded organic solvent. The scandium source may be, for example, a leachate, an industrial byproduct, or a metal sludge, and will typically contain both scandium and iron ions, in addition to other metal ions.
However, it is very difficult to enrich this ore, because of the poor beneficiability of silicate and dispersed distribution of scandium minerals. This paper has focused on magnetic separation processes for the pre-concentration of poor magnetite associated with scandium oxide ore, according to the composition and occurrence state of scandium.
Experimental Study of the Static and Dynamic ... Complex on Extraction Efficiency of REEs from ... as well as scandium and yttrium [1]. Scandium and yttrium are considered REEs since they occur in the same ore deposits as the lanthanides and exhibit similar chemical properties. REEs are cerium (Ce), dysprosium (Dy),
Optimizing Conditions for Scandium Extraction from Bauxite Residue Using Taguchi Methodology Article (PDF Available) in Minerals 9(4):236 · April 2019 with 85 Reads How we measure 'reads'
In this study, the feasibility and mechanism of recovering scandium from a scandium-rich material were investigated based on the acid leaching and solvent extraction process. The results showed that phosphoric acid had an advantage in separating scandium from impurities over hydrochloric acid, sulfuric acid and nitric acid.
Preliminary extraction of scandium and direct input of extractants into flame allow us to increase selectiv-ity and sensitivity of the analysis. Practically full extraction of the complex of scandium from hydrochloride medium was used for develop-ment of extraction-atomic-absorption determination of scandium in soils. Selective technique for ...
Scandium is a chemical element with the symbol Sc and atomic number 21. A silvery-white metallic d-block element, it has historically been classified as a rare-earth element, together with yttrium and the lanthanides.It was discovered in 1879 by spectral analysis of .
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