experimental study on extraction of scandium from complex scandium mining

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Distribution of Lanthanides, Yttrium, and Scandium in the Pilot-Scale ...

Beneficiated fly ash from the combustion of Central Appalachian high volatile bituminous coals was extracted with HNO 3 in a pilot-scale processing plant. Several major oxides (notably CaO and SO 3, but also including Fe 2 O 3, MgO, K 2 O, and P 2 O 5) and minor elements (Mn, As, Sr, Ba, and Pb) are depleted in the post-HNO 3-extraction spent ash.The total lanthanides, Y, and Sc concentration ...

In situ recovery, an alternative to conventional methods of mining ...

2014, and the capacity of ISR mining of uranium is now comparable with that from conventional uranium mines. • Commodities. A review of the use of ISR for mining other commodities, namely copper, gold, nickel, scandium, rhenium, rare earth elements, yttrium, selenium, molybdenum, and vanadium. ISR for copper was introduced

Luis Martinez - Academia.edu

Luis Martinez studies Hacked Arcade Games, Stone, and Computers. ... new experimental and computational evidence provided serious alternatives to this hierarchical model. Parallel models put forward the idea that both simple and complex receptive fields could be built in parallel by direct geniculate inputs. ... An on-line scandium ...

Extraction and Recovery of Cerium from Rare Earth Ore by Solvent Extraction

The diagram of this process is shown in Figure 1. When Ce (III) was oxidized to Ce (IV), F (I) and P can be easily recovered from leaching liquor by solvent extraction in virtue of the complex properties of Ce (IV) with F (I) and P [ 18 ]. After extraction, Ce products can be obtained by reductive stripping.

Methods and devices for the separation of radioactive rare earth metal ...

A phosphor comprises a borate of terbium, at least an alkaline-earth metal, and at least a Group-3 metal. In one embodiment, the phosphor has a formula of A.sub.3(D.sub.1-xTb.sub.x).sub.3(BO.sub.3).sub.5; wherein A is at least an alkaline-earth metal selected from the group consisting of calcium, barium, strontium, and magnesium; D is at least a Group-3 metal selected from the group consisting ...

Scandium Recovery Methods from Mining, Metallurgical Extractive ... - MDPI

The recovery of scandium (Sc) from wastes and various resources using solvent extraction (SX) was discussed in detail. Moreover, the metallurgical extractive procedures for Sc recovery were presented. Acidic and neutral organophosphorus (OPCs) extractants are the most extensively used in industrial activities, considering that they provide the highest extraction efficiency of any of the ...

Modeling study on the influence of the strip filling mining sequence on ...

In summary, scholars have done a substantial amount of research on strip filling mining. However, there is a lack of research on the influence of strip mining and the filling sequence on surface subsidence in coal mining. In strip filling mining, there are two mining sequences: first mining and then filling or first filling and then mining.

Sulfuric Acid Leaching of Heavy Rare Earth Elements (HREEs) from ...

The characterization process was carried out to obtain actual information from zircon tailing samples. This process showed total rare earth elements (REEs) content of 58.62%, at 9%, 1%, 1.2%, 1.7%, and 1.5% for Y, Gd, Er, Dy, and Yb, respectively. A sieving process was carried out since it was known that most heavy rare earth elements (HREEs ...

Rare Earths Industry - 1st Edition - Elsevier

Scandium and yttrium have similar properties, with mineral assemblages, and are therefore referred alike in the literature. ... Extraction Behavior of Scandium From a Refractory Nickel Laterite Ore During the Pressure Acid Leaching Process. 1. Introduction; 2. Experimental; 3. Results ... Additional Case Study on Mineralogy and Beneficiation of ...

US9982326B2 - Solvent extraction of scandium from leach ... - Google

A method for isolating scandium values is provided. The method includes extracting scandium values from a leachate with an organic solvent, thereby obtaining a scandium-loaded organic solvent, wherein the leachate contains iron and scandium ions, and wherein the organic solvent contains a primary amine. The scandium values are then stripped from the scandium-loaded solvent with a stripping ...

Predictive capability evaluation and mechanism of Ce (III) extraction ...

The extraction of cerium versus time was shown in Fig. 2 a. The amount of cerium extracted by Cyanex 572 was measured at 2.5, 5.0, 7.5, 10, 15, 20, and 30 min. The extraction efficiency at the initial time was increased drastically and reached an approximately constant value after 10 min. So, 10 min is enough time to attain equilibrium.

Minerals for future technologies: how Germany copes with challenges ...

The main focus of the research topic in a global perspective is on the identification of new raw material potentials of critical metals for high-technology applications. Most of the critical metals, e.g. rare-earth elements (REE), cobalt, scandium, indium and platinum group elements (PGE), generally occur in trace amounts in rocks.

[PDF] Selective Extraction of Rare Earth Elements from Phosphoric Acid ...

Rare earth elements (REE) are present at low concentrations (hundreds of ppm) in phosphoric acid solutions produced by the leaching of phosphate ores by sulfuric acid. The strongly acidic and complexing nature of this medium, as well as the presence of metallic impurities (including iron and uranium), require the development of a particularly cost effective process for the selective recovery ...

Danai Marinos - Academia.edu

In this study, scandium extraction from Bauxite residue based on sulfuric acid leaching is
presented. Scandium dissolves at elevated temperatures under high acid concentration
reaching recovery yields up to 90%.

Sorption-Extraction Processes in Uranium Hydrometallurgy ... - DeepDyve

Sorption-extraction processes for obtaining finished coproducts during processing of uranium ores with valuable components, such as Mo, V, W, Re, Au, Sc, rare-earth elements, Y, Cs, Cu, Ta, Nb, Zr, Hf, Mn, Sn, and Se, are described. Special attention is focused on experience in extraction decontamination of phosphoric acid with its uranium and thorium content decreased by a factor of 20 and ...

Machine Learning & Analytics Group - Research

The research program melds high-performance computing and techniques for "big data" analysis to enable new avenues of scientific discovery. The focus is on developing powerful and widely applicable approaches to attack problems that would otherwise be largely intractable. Base Program - Scalable Data-Computing Convergence and Scientific ...

The Economic Geology of Scandium, the Runt of the Rare Earth Element ...

R. Kallio, P. Tanskanen, S. Luukkanen. Geology. Minerals. 2021. Scandium is classified as a critical raw material by the European Union. Its beneficiation from various primary and secondary sources is currently being studied under several research and development.. 4.

Use of C-300 Synthetic Resin for Rare Earths Separation

Yttrium samples containing 0.02 to 2.0% terbium impurity were anaylzed. and, under the given experimental conditions, a detection limit of 0.0001% of terbium tn yttrium was calculated to be possible. The sensitivity of detection may be furtpder improv-ed if the counting ttme, the thermal neutron flux, and the irradiation time were increased.

Preparation of a mixed Al/Sc nano-oxide derived from the bauxite ...

In this study, three methods were used and compared for the selectable extraction of aluminum/ scandium with the least amount of iron in red mud (RM) samples from the Iran alumina plant in Jajarm as follows: 1) RM direct acid leaching with H 2 4, 2) RM washing with hydrochloric acid and oxalic acid before leaching with H 2 SO 4

Kinetics Study of Solvent and Solid-Phase Extraction of Rare ... - MDPI

as a collateral admixture in other minerals. For this reason, extraction remains the main method to recover them from complex water-salt solutions with low pH values caused by the speciﬁcs of rare metals ores reprocessing techniques [1,2]. A well-known factor complicating the implementation of solvent extraction is the use of ﬂammable,

(PDF) Experimental Study of Pre-concentration from ... - ResearchGate

Scandium Experimental Study of Pre-concentration from Silicate Containing Rare Earth Ore with Scandium by Magnetic Separation Authors: Peng Yan Kunming University of Science and Technology Guifang...

Energy Research Center Lehigh Energy Update

The Lehigh University Energy Research Center (ERC), in collaboration with Applied Separations of Allentown, PA, is conducting research to investigate the feasibility of a chelate-enhanced sCO2 method for REE extraction from acid mine drainage (AMD). AMD is a metal-rich acidic wastewater byproduct from the coal mining industry. The project is

Cronfa - Swansea University Open Access Repository

In particular, recent studies highlighted the important role played by d-electrons in phase transitions under pressure .7 1.3 Extraction costs and natural occurrence According to data published by the Scandium International Mining Corporation in 2015, scandium occurrence in minerals is around 22 ppm, making it more abundant than lead,

A Novel Process for the Extraction and Separation of High-Purity ...

The adsorbents are capable of selectively adsorbing and separating scandium and rare earth elements from complex acidic solutions. By tuning and optimizing experimental process settings and operating conditions, individually separated, high purity scandium and rare earth salts will be recovered and separated from acidic titanium oxide tailings.

Extraction 2018 : Proceedings of the First Global Conference on ...

Contributions examine new developments in foundational extractive metallurgy topics and techniques, and present the latest research and insights on emerging technologies and issues that are shaping the global extractive metallurgy industry. The book is organized around the following main themes: hydrometallurgy, pyrometallurgy, sulfide ...

Advanced Materials Research Vols. 807-809 - Scientific.Net

Experimental Study on Extraction of Scandium from Hydrochloride Acid Leaching Liquid in TBP. ... 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 ...

Novel Approach for Enhanced Scandium and Titanium Leaching ... - Nature

Another study performed by Borra et al. reported a 70% Sc extraction via direct leaching of red mud with 6 M sulfuric acid with low solid-to-liquid ratio of 1/50 at the end of 24 hours 21.

Frontiers | An Overview of Seabed Mining Including the Current State of ...

Research suggests that seafloor sediment may also be a valuable source of rare earth elements (the lanthanides, plus scandium, and yttrium), with estimated reserves of more than 100 million metric tons (Kato et al., 2011). Most marine seafloor massive sulfide deposits are in the range 1 to 5 million (Hoagland et al., 2010).

Text-mined dataset of inorganic materials synthesis recipes - Nature

The dataset is publicly available and can be used for data mining of various aspects of inorganic materials synthesis. Measurement (s) solid-state synthesis data. Technology Type (s) natural ...

The biogeochemical cycling of iron, copper, nickel, cadmium, manganese ...

Scandium displayed similar trends to Fe, reinforcing the limited observations of the physicochemical similarities between these two elements in seawater. Overall, this study highlights distinct impacts of photochemical processes, scavenging, and biological effects on marine trace metal cycling in an environment characterized by seasonal upwelling.

Strip Liquor by Anti-Solvent Crystallization - Semantic Scholar

2.2. Experimental Procedure The scandium containing strip liquor was prepared through the solvent extraction of a synthetic scandium sulphate solution followed by stripping since this procedure mimics that employed to recover scandium by the envisaged process. The organic solvent that was used contained D2EHPA purchased

Cadmium - Wikipedia

Cadmium is a chemical element with the symbol Cd and atomic number 48. This soft, silvery-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury.Like zinc, it demonstrates oxidation state +2 in most of its compounds, and like mercury, it has a lower melting point than the transition metals in groups 3 through 11. ...

Technospheric mining of scandium from ... - ScienceDirect

Mar 30, 2022Scandium, iron and chromium dissolutions in various acids using 0.5 and 1.0 mol/L of the acid at a temperature of 25 and 80 °C, pulp density of 100 g/L and stirring speed of 600 rpm after 6 h of leaching. Fig. 3 shows that the highest dissolutions for Sc, Fe and Cr in other acids were achieved using 1.0 mol/L of the acid at 80 °C.

Optimizing Conditions for Scandium Extraction from Bauxite Residue ...

Taking into account scandium's 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 with sulfuric acid is investigated using Taguchi methodology.

Antiproliferative Properties of Scandium Exopolysaccharide Complexes on ...

Complexation between scandium and polysaccharides has been previously checked and displayed using Free-Ion Selective Radiotracer Extraction (FISRE) as described somewhere else . FISRE was used to determine the stability constants of a complex L:M, at tracer level, using a cationic exchange resin Chelex 100, poured into the solutions.

US4816233A - Ion exchange method for the recovery of scandium - Google ...

A method of recovering quantitatively trace amounts of scandium from aqueous solutions containing large amounts of other metals consists of reducing any manganese and iron in the solution to the divalent states of manganese and iron. The solution is then adjusted to a pH from about 1.9 to about 2.1 and passed through a column of the ion exchange resin in the hydrogen form having an ...

Scandium-microorganism interactions in new biotechnologies

Scandium (Sc) plays a special role in high-tech industries because of its wide application in green, space, and defense technologies. However, Sc mining and purification are problematic due to political, technological, and environmental difficulties. The deficit of this element limits global technological development. One sustainable solution to this problem is to use microorganisms to extract ...

Mining of Mineral Deposits - SUNIC

Purpose. To study conditions of forming the zones of high metal concentration in metal-containing man-made deposits. To assess the likelihood of metal concentration in the placer core. Methods. Analysis of the conditions determining metal-containing placers formation and of metal losses at mining and processing plants, considering the local ...

Coupled Thermo-Hydro-Mechanical-Chemical Modeling of ... - Hindawi

The meager availability of water as a heat transfer fluid is sometimes an impediment to enhanced geothermal system (EGS) development in semi-arid regions. One potential solution is in substituting CO₂ as the working fluid in EGS. However, complex thermo-hydro-mechanical-chemical (THMC) interactions may result when CO₂ is injected into the geothermal reservoir. We present ...

Selective Recovery of Rare Earth Elements Using a Hydroxyapatite ...

During mining and refining processes, numerous steps and the generation of large amounts of toxic and radioactive wastes have led to health, environmental, and cost concerns. 5, 17. Both growing demand and increasing supply risks of REEs make it important to explore more abundant REE resources for more sustainable extraction and recovery.