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Energy supplement with acoustic cavitation of 130 kWh/kg concentrate resulted in a leaching recovery of tungsten (WO 3) of 71.5%, compared to 36.7% obtained in absence of ultrasound. The results confirm that the method developed is energy efficient and gives a recovery rate potentially better than current autoclave technology.
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mica minerals to form Li/Na/K-sulphates, which are solubilised during a subse-quent water leach step, with rejection of water insoluble aluminium and iron oxides, and silica [2]. …
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Table 2 summarises various lepidolite-processing techniques proposed in the literature. At present, most of the techniques proposed for extracting lithium from lepidolite may involve energy intensive high temperature (850–1000 °C) roasting with additives followed by atmospheric leaching with water or digestion with concentrated acids …
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Feldspar beneficiation produces large amounts of slime waste, which should be efficiently recycled to achieve the economic and environmental benefits. In this study, mechanochemically assisted acid leaching (MAL) was employed to efficiently recycle high-grade concentrate powders, and the physically beneficiated powder from feldspar slime …
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The XRD diagram pattern of the raw spodumene concentrate shows the feed is predominantly α-spodumene (about 60%) with quartz, albite, mica and amphiboles as …
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The leaching efficiency of Nd and Fe increased in direct proportion to the amount of adsorbent. Nd was removed with an efficiency of 78.5 % at the lowest dosage of 0.2 g, however Fe was only recovered to a percentage of 0.32 %. The leaching efficiency of Nd climbed to 95.2 % and that of Fe increased to 1.22 % with a dose increase to 1.2 g.
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Spodumene concentrate from the Pilbara region in Western Australia was characterized by X-ray diffraction (XRD), Scanning Electron Microscope Energy Dispersive Spectroscopy (SEM-EDS) and Mineral Liberation Analysis (MLA) to identify and quantify major minerals in the concentrate.
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The global lithium resource reserves are 22 Mt (metal) (USGS, 2022), of which 34% are from hard rock lithium mines (Li LJ et al., 2018), mainly including Australia Greenbushes, Canada Quebec, China Jiajika, Zimbabwe Bikita and other pegmatite lithium deposits (Zhang SJ et al., 2020; Yang HP, et al. 2019).There are more than 150 kinds of …
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A cation exchange ratio between 35% and 154% of their cation exchange capacity (CEC) was achieved, being more efficient when mica layer charge diminished. …
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The extraction of critical metals in a circular mining system begins with mineral processing (Fig. 2).Mineral processing involves liberating and concentrating economical metals and minerals from a mined resource using comminution (particle size reduction), classification (particle size screening), and separation technologies (e.g., …
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Both the rare metal in the mica and the mica minerals are valuable resources. However, in order to obtain the rare metal during the conventional extraction process, the mica crystal has to be destroyed, which results in a lot of solid waste being generated and inefficient utilization of mica minerals. In this work, rubidium-bearing …
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Sulfuric Acid–Fluoride Leaching of the Mica Concentrate Micaconcentrate(MC)comprises2–4mass.%ofresidualfluorite.Moreover,alums contain …
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Gold extraction by iodine-iodide solution is an effective and environment-friendly method. In this study, the method using iodine-iodide for gold leaching is proved feasible through thermodynamic calculation. At the same time, experiments on flotation gold concentrates were carried out and encouraging results were obtained. Through …
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The comparison of gold leaching conditions and leaching efficiencies of polysulfide system of gold concentrate, oxygen pressure leach residue, and decomposed sodium jarosite residue is shown in Table 9. The leaching efficiency of gold from the gold concentrate is only 7.6%, as most of the gold is encapsulated in sulfide ore.
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An energy-efficient route for simultaneous extraction of lithium, rubidium and cesium from a lepidolite concentrate via concentrated sulfuric acid baking followed by water leaching was systematically investigated in this study. The lepidolite concentrate was characterized by automated mineralogical technique AMICS.
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Oxygen pressure acid leaching residue of zinc sulfide concentrateOxygen pressure acid leaching residue of zinc sulfide concentrate contains abundant elemental sulfurElemental sulfur that has excellent natural hydrophobicity, and thus, it …
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Lithium is considered to be the most important energy metal of the 21st century. Because of the development trend of global electrification, the consumption of lithium has increased significantly over the last decade, and it is foreseeable that its demand will continue to increase for a long time. Limited by the total amount of lithium on the …
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The preparation process of sodium molybdate has the disadvantages of high energy consumption, low thermal efficiency, and high raw material requirement of molybdenum xide, in order to realize the green and efficient development of molybdenum concentrate resources, this paper proposes a new process for efficient …
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Efficient processing of mica concentrate can be carried out using an alkaline extraction technology, including decomposition with a sodium hydroxide solution …
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To solve the problems caused by roasting–leaching, it is necessary to develop a green, clean, efficient, and energy-saving extraction process for vanadium-bearing shale . Extracting vanadium by acid leaching without roasting can save the equipment for roasting minerals and avoid environmental pollution, which has become …
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Under the optimized conditions of hydrochloric acid concentration of 6 mol/L, liquid-to-solid ratio of 5:1, temperature of 95 °C, stirring speed of 400 rpm, and time of 300 min, the leaching efficiency of bismuth reached 97.64 %, and the bismuth content in the leaching residue was 0.93 %, while molybdenum remained in the form of MoS 2 in the ...
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This method is environmentally friendly and energy-saving, but the extraction cycle is long and requires strain screening and culture for different types of mica ores. Development Trend of Mica ...
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Calcination treatment of Li-bearing clay is a necessary step in the ion exchange leaching process, and the calcination temperature has been investigated by using sulfuric acid for leaching (Gu et al., 2020a).The Li-bearing clay calcined at various temperatures (400, 500, 600, 700, and 800 °C) was leached using a 15% ferric sulfate …
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Extraction of lithium chemicals is an important prerequisite for the efficient exploitation and utilization of Li resources. Extensive development have been experienced in lithium extraction from brines using conventional solar evaporation and precipitation processes (Liu et al., 2019a).Emerging innovative techniques such as solvent extraction, …
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Surface morphology and element distribution of leaching residues are studied. The particle size of leaching residues is mainly concentrated above 1 mm and below 74 μm. After sieving, leach residues which are in two different particle size ranges are analyzed separately. 4.2.1. Results of surface morphology analysis
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Nonetheless, it can be assumed that before leaching, the electromechanical-energy-assisted pre-adsorption of F − enhances the reactivity of the mica surface to some degree, thereby reducing the activation energy for vanadium leaching.
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A cation exchange ratio between 35% and 154% of their cation exchange capacity (CEC) was achieved, being more efficient when mica layer charge diminished. ... low-carbon energy-saving, and sustainable solutions for sewage heavy metal treatment. ... and the results of the Toxicity Leaching Test (TCLP) showed that the addition of N-HAS ...
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A new collector prepared using decyloxy-propyl-amine (DPA) and α-bromododecanoic acid (α-BDDA) at a molar ratio of 1:1 increased the difference in the recovery of spodumene (82.14%) and feldspar (32.48%) significantly [53].The difference in recoveries of spodumene and feldspar was 27.47% while using DPA only, whereas the …
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To process mica concentrate the energy-efficient technology of sulfuric acid–fluoride low-temperature atmospheric leaching was developed enabling to exclude the preliminary roasting commonly ... nology Center (RUSAL ETC) developed an energy-saving roasting-free process. This process will be implemented upon retrofitting a cryolite shop of ...
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Sulfuric Acid–Fluoride Leaching of the Mica Concentrate. Mica concentrate (MC) comprises 2–4 mass.% of residual fluorite. Moreover, alums contain fluorine as an additional anionic group. When mica concentrate is leached with sulfuric acid fluorine …
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