Alafara BABA | Professor & Head | Ph.D Chemistry
The uranium extraction from sulphate pregnant solution by Cyanex®272 in kerosene diluent was examined. ... mesoporous silica was prepared from thermal activated kaolinite ore via a template-free ...
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Adsorption of rare earth elements in regolith-hosted clay deposits
Global resources of heavy Rare Earth Elements (REE) are dominantly sourced from Chinese regolith-hosted ion-adsorption deposits in which the REE are inferred to be weakly adsorbed onto clay minerals.
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Insights into lithium adsorption by coal-bearing strata kaolinite
The sharp increase in the demand for lithium (Li) for high-energy-storage battery materials due to its high specific energy and low negative chemical potential render Li a geopolitically significant resource. It is urgent to develop a low-cost, efficient method to improve lithium extraction. Herein, Li ion (Li+) adsorption in coal-bearing strata kaolinite …
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Critical metal enrichment in Upper Carboniferous karst bauxite of …
Bauxite is a prominent constituent of the paleoweathering crust that formed during a ~ 150-million-year-long interval between the Ordovician and Late Carboniferous on the North China Craton, representing one of the largest karst bauxite deposits globally. Although critical metal-bearing minerals are found in this layer regionally, the …
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Kaolin deposits and occurrences in Africa: Geology
Geologists, Chemical and Mineral Processing Engineers, Extraction Metallurgists and Clay Mineralogists, as well as allied professionals will find this contribution very useful; and as a guideline document for kaolin geneses and utilization in Africa. These efforts if appropriately executed may contribute positively to national economies in Africa.
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Recent advances in lithium extraction from lithium-bearing clay
The Li extraction and K recovery were 92.78% and 81.72% respectively under the optimum conditions: K2SO4/KOH/ore mass ratio of 1:0.5:1, roasting at 900 °C for 2 h, and water leaching at 90 °C ...
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Dissolution Kinetics Potential of a Biotite-Rich Kaolinite Ore for
In this study, the upgrading of a Nigerian biotite-rich kaolinite ore by a hydrometallurgical route was investigated in oxalic acid media. During leaching studies, …
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Recent advances in lithium extraction from lithium-bearing clay
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 …
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Review on the Development and Utilization of Ionic Rare …
The development of leachate purification and rare earth extraction technology is summarized. We aim to provide guidance for the industrial development of IREO ... in ionic phases on the surface of clay minerals such as kaolinite, montmorillonite, and illite in the weathering layer, and eventually enrich into ionic rare earth deposits [10 ...
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Kinetic Analysis of Aluminum Extraction from Ethiopian Kaolinite …
Abstract. The aim of this study was kinetic investigations of aluminum extraction from Ethiopian kaolinite with hydrochloric acid. The effects of extraction parameters, namely, solid-to-liquid ratio (0.05, 0.075, 0.100, and 0.125 g·mL −1), acid concentrations (2, 3, 4, and 5 M), reaction temperature (50, 60, 70, and 80°C), and time …
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Potential of a Nigerian biotite-rich kaolinite ore to industrial
The kaolinite ore sourced from Nane Didan Bundugu area (N12"03"46.5"E006"29"77"), Zamfara State, Nigeria was ... extraction, prior to its beneficiation as high-grade
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Provenance and ore-forming process of Permian lithium-rich …
Clayey bauxite is dominated by boehmite (48–56 wt%) and kaolinite (38–45%), with minor amounts of diaspore and anatase (Fig. 7 A and B; Table 2). In clayey bauxite layers, kaolinite occurs as cryptocrystalline aggregates in the matrix (Fig. 9 D). Goethite occurs as an acicular shape infilling the voids of sediments (Fig. 9 D).
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Iron Ore Tailings: Characterization and Applications
During the iron minerals extraction from BIF, two types of non-economical tailing materials called generically iron ore tailings (IOT) are generated, i.e., a coarse tailing, generated in the flotation stage, consisting mainly of quartz, and a fine tailing, whose main components are usually quartz, hematite, goethite, and kaolinite.
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Comprehensive Extraction of Silica and Alumina from High
The comprehensive extraction of silica and alumina from HACG was achieved with the following processes: (1) reduction roasting to convert kaolinite into hercynite and silica solid solutions; (2) oxidation for the decomposition of hercynite into iron oxides and alumina; (3) alkaline leaching to effectively leach the silica from the actively ...
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Mechanical activation of pyrophyllite ore for aluminum extraction …
A pyrophyllite [Al 2 Si 4 O 10 (OH) 2] ore as an alternative source for alumina (Al 2 O 3) was intensively milled for mechanical activation to increase aluminum extraction by acid leaching method.For this purpose, unmilled and milled ore samples were compared to reveal the changes caused by intensive milling. The samples were also leached in HCl …
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Grain Size Distribution and Clay Mineral Distinction of …
The average content of kaolinite in the REE ore is 14.67% and the standard deviation is 4.72. In all columns except T1 and T2, the first sampling port (depth: 30 cm) shows that the variation in kaolinite …
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Alumina Extraction from Kaolinite via Calcification-Carbonation …
The kaolinite ore used in this research was from the Jiangxi province of China. The mass contents of alumina, silica and ignition loss in the kaolinite were 39.50, 45.45, …
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Preparation of industrial alumina from a biotite-rich kaolinite (BRK
After appropriate optimisation, an extraction efficiency of 98.6% Al(III) by 0.25 mol/L Cyanex®272 in kerosene diluent at 27 ± 2°C in the equilibrium pH range of 3.0–3.5 was achieved from an initial biotite-rich kaolinite leach liquor containing 1864.7 mg/L Al, 123.4 mg/L Fe, 70 mg/L Mn and 17.6 mg/L Ti as a major constituents.
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Extraction of alumina from kaolin by a combination of pyro- and …
This paper studies the extraction of alumina from the kaolin ore excavated from the Irkutsk region, Russia through the leaching process, using aqueous solutions of …
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Study on Solvent Extraction of Rare Earth Elements from …
The process of rare earth ion extraction with P204 mainly includes the following steps: (1) P204 dissolution distribution equilibrium in two phases; (2) P204 dissociates in. yttrium was taken as a proxy of all rare earth elements to explore the mechanism of the extraction process.
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Mineral Resources of J&K and Ladakh
In Jammu, kaolinite is discovered beside bauxite deposits. The mineral is known locally as Makol. It is found in the Salal, Songarmar, and Chakar districts of the Bauxite Series between the vast limestone, breccia, nummulitics, and coal measures. In the regions where it occurs, kaolinite deposits are present and can be utilised to make pottery.
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Bauxite Beneficiation: An Approach to Value Addition in Mining
Extract the good quality bauxite lumps by dry screening, before feeding material into the washing plant. ... Thanks to the generally homogeneous nature of washed ore, combined with low kaolinite, goethite, organic carbon and high gibbsitic alumina content, these bauxites are the preferred ore for alumina refineries, dependent on import. ...
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A Study on Removal of Clay Minerals from Barbil Region Iron Ore…
Spectroscopic analysis revealed that iron ore samples obtained from the Barbil region of Odisha contain a high amount of silica and alumina in the form of clay minerals (e.g., kaolinite) contributed as a loss on ignition (LOI) in the iron-making process. Iron ore fines of below 10 mm size were subjected to a laboratory-scale screw scrubber, …
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Dissolution Kinetics Potential of a Biotite-Rich Kaolinite Ore for
Recent years have seen increasing demand for pure aluminum and aluminum compounds of industrial value from kaolinite ore and varieties [1,2,3].Kaolinite (Al 2 Si 2 O 5 (OH) 4) made of silica (SiO 4) tetrahedral sheets and gibbsite (AlO 2 (OH) 4) octahedral sheets with a 1:1 alternating arrangement, is an important industrial mineral with unique …
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Microscopic analyses of weathered granite in ion-adsorption
Thus, kaolinite in the particles possibly plays a key role in the behavior of REEs in the ore, as suggested in previous studies 3,4. However, the elemental maps by Nano-SIMS for the kaolinitic ...
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Characterization and Optimization of Calcination Process
The present study aimed to optimize the calcination process parameters (viz., temperature, time, and particles size) for the extraction of aluminum from Ethiopian kaolinite. The kaolinite calcination was done in the temperature of 600–700°C, time of 120–180 min, and particles size of …
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Extraction of lithium and aluminium from bauxite mine tailings by …
Table 2 shows that the main chemical components in the tailing samples are Al 2 O 3 and SiO 2.In addition, TiO 2 accounts for 2.4%, and the remaining minerals are TFe 2 O 3, K 2 O and MgO, among others. The content of Li 2 O is 0.21%, which meets the grade of industrial ore and is far higher than the average content of bauxite and …
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Review of rare earth element (REE) adsorption on and desorption …
Kaolinite, halloysite and illite are the main adsorbents for REE in the iREE deposits, through ion exchange. • Sequential extraction is commonly performed for the quantitative analysis of REE with different occurrence states. The micro-occurrence state of REE in iREE deposits can be clarified via XAS, SEM/TEM-EDS/EELS and XPS. •
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Kaolinite clay as a raw material for erbium extraction
REM extraction as a by-product of complex processing of kaolinite clay using mineral acids H 2 SO 4, HCl and HNO 3 for leaching has been investigated. Optimum technological conditions of kaolinite clay leaching of Alexeevskoe deposit and ARE are the use of 5% solution of H 2 SO 4, at temperature 50 °C, duration 60 min and L:S ratio = 5.
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Behaviour of swelling clays versus non-swelling clays in flotation
The mineralogy of the ore using XRD analysis has showed that it has 2.3% sulfides (chalcopyrite 0.7%, bornite 1.3%, and pyrite 0.3%), 39.4% quartz, 44.4% feldspar, 4.2% amphibole, 3.2% oxides, and 7.7% carbonates. The clay minerals used in this study were illite, kaolinite and montmorillonite. Kaolinite Q38 was provided by Unimin …
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