Energy efficient process for recovery of rare earths from …
An energy-efficient chlorination roasting-water leaching process over conventional oxidation roasting-acid leaching process was developed for the recovery of rare earths from spent NdFeB magnet. Thermodynamic investigation and TG-DTA studies were carried out for the mixture of NdFeB magnet and NH 4 Cl to understand the …
Neodymium recovery from permanent magnets: A
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.
Novel extraction route of lithium from α-spodumene by dry …
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 …
Neodymium recovery from permanent magnets: A
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 …
A Cesium-Selective Ion Sieve Made by Topotactic Leaching of Phlogopite Mica
A hydrated, sodium phlogopite mica with a c-axis spacing [d(001)] of 12.23 Å made by careful low-temperature leaching, showed extremely high selectivity for cesium.This newly discovered cesium ion sieve is useful in the decontamination as well as immobilization of cesium at room temperature through chemical bonding and may find applications in …
Recovery of lithium from spodumene-bearing pegmatites: A …
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 …
Extracting rubidium and potassium from complex …
consumption of sulfuric acid in the acid leaching process could be reduced by 200 kg/t after two-stage leaching. Leaching kinetics showed that the leaching process of the rubidium ore water quenched slag was consistent with the hybrid control model and the apparent activation energy of the leaching reaction E a=31.46 kJ/mol.
Co-Smelting Process of Pb Concentrate and Zn Leaching
The application of oxygen-rich side blowing furnaces in the direct lead-smelting process has excellent potential and ideal capability for co-processing various feedstocks, such as zinc leaching residues, jamesonite precipitates, lead paste and lead–silver dregs, etc. In this study, the industrial application for this process has been …
Summary of Mica Ore Extraction Technology | by Ch | Medium
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 ...
Efficient co-extraction of lithium, rubidium, cesium and …
A chlorination process for efficient co-extraction of Li, Rb, Cs and K from lepidolite concentrate was investigated in this study. The lepidolite concentrate was roasted with a mixed chlorination agent of CaCl 2 and NaCl at moderately high temperature followed by water leaching.
Energy-efficient and simultaneous extraction of lithium, …
An optimized baking and leaching condition was determined as follows: H 2 SO 4 concentration 85 wt%, baking temperature 200 °C, acid-to-concentrate mass ratio 1.7:1, baking time 4 h, 88% concentrate particles <74 μm, and water leaching temperature 85 …
Recent Advancements on Energy-Saving LEACH Protocol in …
As per Table 1, Fig. 1 shows the year-wise comparative analysis of EERP-LEACH protocols and techniques to enhance network lifetime. The researcher has improved the above LEACH protocols to enhance the network lifetime. The x-axis shows Enhanced LEACH protocols and the y-axis shows network lifetime.These kinds of …
Rubidium extraction from mineral and brine resources: A …
Energy-efficient and simultaneous extraction of lithium, rubidium and cesium from lepidolite concentrate via sulfuric acid baking and water leaching Hydrometallurgy, 185 ( 2019 ), pp. 244 - 249 View PDF View article View in Scopus Google Scholar
Extraction of tungsten from scheelite using hydrodynamic …
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.
Efficient Leaching of Rubidium from Biotite by Ion Exchange …
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 …
Preparation of sodium molybdate from molybdenum concentrate …
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 …
An Integrated Process Including Rb Leaching from Rubidium …
Therefore, it is necessary to propose an efficient and energy-saving calcium removal process for leachate and to make good use of Rb raffinate. ... Wang W, Wang HL, Liu L (2017) Investigations on roasting and leaching of a mica rough concentrate containing rubidium and lithium. Conser Util Miner Resour 5:64–66. Google …
Comprehensive Processing of Mica Concentrate from
Sulfuric Acid–Fluoride Leaching of the Mica Concentrate Micaconcentrate(MC)comprises2–4mass.%ofresidualfluorite.Moreover,alums contain …
Leaching of lepidolite and recovery of lithium hydroxide …
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 …
Effect of mechano-chemical activation with NaF on improved …
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.
Recent advances in lithium extraction from lithium-bearing …
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, …
An effective method for directly extracting lithium from α
The spodumene concentrate employed in this study was provided by a company in Guangdong Province. Table 1 lists the primary chemical components of spodumene. Fig. 1 presents the XRD analysis of α-spodumene, quartz (SiO 2), and muscovite (KAl 2 Si 3 AlO 10 (OH) 2), as the major phases of the spodumene …
Lithium processing technology Complete solutions that …
energy-efficient, technically advanced, forced-air flotation machine on the market. It has been specifically designed to maximise fine particle recovery. Dorr-Oliver flotation cells, in conjunction with the self-aspirated WEMCO® flotation cell, provide a mixed row flotation that delivers the highest recovery possible.
Lithium activation pretreatment mechanism and leaching …
Lithium (Li) is the lightest metallic element, one of the most important rare elements being used in the military, aerospace, nuclear industry, and new energy fields, and is known as the metal that is driving the world forward (Eppinger and Fuge, 2009).Demand for lithium is growing exponentially as governments around the world …
Energy-efficient and simultaneous extraction of lithium, …
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.
Lithium extraction from hard rock lithium ores (spodumene, …
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 …
Physico-Chemical Characteristics of Spodumene Concentrate …
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.
Development of SiLeach® Technology for the Extraction …
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]. …
Hard Rock Lithium Processing
The multi-step process involves atmospheric leaching, liquid-solid separation and impurity removal via precipitation and ion-exchange. Our team expertise can deliver: High grade …
A review of lithium extraction from natural resources
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 …