bauxite residue leaching

Bauxite Residue Handling Practice and Valorisation ,
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01-06-2018 0183 32 EURARE Project REE Leaching from BR NTUA Leaching with HbetTf2N Leaching residue for pig iron production Stripping with acid filtration Ionic liquid recycling filtrate Bauxite residue For impurity removal to Sc2O3 production SiO 2 654 Al 2 O 3 1227 Fe 2 O 3 5611 CaO 006 TiO 2 751 LOI 782 Bauxite Residue 2...

ARTICLE Addressing the Challenge of Bauxite Residue ,
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11-03-2019 0183 32 Bonomi, C, et al Scandium and Titanium Recovery from Bauxite Residue by Direct Leaching with a Br√łnsted Acidic Ionic Liquid, Metals 2018, 8, 834, 2018, pp 1-17 Liu, Z, et al, Selectively recovering scandium from high alkali Bayer red mud without impurities of iron, titanium and gallium, Journal of Rare Earths , Vol 35, Issue 9, September 2017, pp 896-905...

PDF Bauxite residue slag leaching for Al, Ti and Sc recovery
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Upon H2SO4 leaching, the main elements present in Bauxite residue such as Fe, Ti and Al co-dissolve, resulting to a pregnant solution of several g/L and Sc ,...

Extraction of Scandium from Critical Elements
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14-09-2021 0183 32 Acid Leaching of Bauxite Residue Supported by Hydrogen Peroxide Silica gel polymerization during the acid leaching of bauxite residue is one of the biggest challenges to be overcome since a part of the liquor is trapped inside the silica gel, resulting in ,...

Leaching Kinetics of Bauxite in Hydrochloric Acid Mineral ,
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The process consists of the following steps calcination of bauxite, leaching of calcined bauxite in hydrochloric acid, filtration of residue, crystallization of A1C136 H2O, decomposition of AlCl36 H2O crystals to produce A12O3, regeneration of hydrochloric acid ,...

Leaching Kinetics of Bauxite in Hydrochloric Acid Mineral ,
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The process consists of the following steps calcination of bauxite, leaching of calcined bauxite in hydrochloric acid, filtration of residue, crystallization of A1C1 36 H 2 O, decomposition of AlCl 36 H 2 O crystals to produce A1 2 O 3, regeneration of hydrochloric acid for ,...

Recovery of rare earths from bauxite residue slag by high ,
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Bauxite residue BR, also called red mud represents an interesting source for major elements such as aluminium, iron and titanium, but also for rare-earth elements REEs 1 Several methods based on direct acid leaching have been...

Selective recovery of rare earths from bauxite residue by ,
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Bauxite residue Leaching Rare earths Red mud Roasting Sulfation abstract Bauxite residue red mud that is generated from karst bauxite ores is rich in rare-earth elements REEs The REEs can be recovered from bauxite residue by direct acid leaching but the extraction yields are gen-erally low...

In situ neutralisation of uncarbonated bauxite residue mud ,
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Pre-deposition treatment of bauxite residue mud BRM with CO 2 gas carbonation lowers leachate pH to ca 105 Laboratory scale leaching columns were used to investigate the potential for in situ pH reduction in existing uncarbonated BRM deposits through exposure to carbonated mud leachate...

Leaching optimization and dissolution behavior of alkaline ,
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1 Leaching optimization and dissolution behavior of alkaline anions in bauxite residue Xiao-fei LI 1, Yu -zhen YE1, Sheng-guo XUE 1, 2, Chuan WU 1, 2, Xiang-feng KONG 1, William Hartley 3, Yi-wei LI 1 1 School of Metallurgy and Environment, Central South University, 932 Lushan South Road, Changsha, Hunan, 410083, PR China...

Selective recovery of rare earths from bauxite residue by ,
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Bauxite residue red mud that is generated from karst bauxite ores is rich in rare-earth elements REEs The REEs can be recovered from bauxite residue by direct acid leaching but the extraction yields are gen- erally low...

PDF Extraction of Aluminium By Autoclave Hydrochloric ,
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Hydrochloric acid leaching of Low-grade bauxite with high content of iron , The methods of artificial ageing of such liquors and slurries are suggested to ,...

Smelting of bauxite residue to form a soluble sodium ,
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18-07-2013 0183 32 Abstract Optimum fluxing, smelting and leaching practices have been determined for maximising the recovery of alumina and soda, but not iron, from a slag produced by oxidative smelting of bauxite residue at 1400 176 C...

Methods for Alkaline Recovery of Aluminum from Bauxite Residue
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leaching of aluminum-bearing ores mostly bauxite with sodium hydroxide solution At this high pH value and elevated temperature and pressure, aluminum hydroxides from bauxite dissolve selectively as following Eq 1 in this case gibbsite , while most of the other compounds remain insoluble in the leaching or bauxite residue, the so-called...

Leaching of rare earths from bauxite residue red mud
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Bauxite residue Lanthanides Leaching Rare earths Red mud Waste processing abstract Bauxite residue or red mud is a waste generated during the Bayer process of alumina production Its storage is a spatial and environmental concern Currently, there are no bulk applications of bauxite res-idue except for minor use in cements and ceramics...

Characterization of Untreated and Neutralized Bauxite ,
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05-05-2008 0183 32 Leaching data was modeled using a geochemical speciation program to determine which chemical processes are controlling bauxite residue leaching behavior This approach showed that the nine residue samples examined behaved very similarly for most elements, despite being generated by different refineries that utilize bauxite from different sourc...

In situ neutralisation of uncarbonated bauxite residue mud ,
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Unameliorated residue mud from the Bayer process generates highly alkaline leachates pH ca 13 after deposition in storage areas Pre-deposition treatment of bauxite residue mud BRM with CO 2 gas carbonation lowers leachate pH to ca 105 Laboratory scale leaching columns were used to invest ,...

Bauxite Residue Management
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VII Utilisation of Bauxite Residue 19 - 24 a Potential applications 19 - 23 b Commercial applications with significant potential 24 VIII Remediation and Rehabilitation 25 - 28 a Case study From red to green in ten years 26 - 27 IX Recent Studies on Bauxite Residues 29 a Leaching assessment methodologies 29...

Recovery of Iron and Aluminum from Bauxite Residue by ,
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quent slag leaching in a sodium carbonate solution Na 2 CO 3 leaves a residue that consists primarily of calcium-carbonate and -silicates, which may be recycled by the agriculture and/ or construction sectors Similar concepts can also be adapted to treatment of already stockpiled bauxite residue 2 Works...

Leaching of copper and nickel in soil
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12-03-2015 0183 32 Leaching of copper and nickel in soil-water systems contaminated by bauxite residue red mud from Ajka, Hungary the importance of soil organic matter Cindy L Lockwood , 1, 6 Douglas I Stewart , 2 Robert J G Mortimer , 1, 7 William M Mayes , 3 Adam P Jarvis , 4, 5 Katalin Gruiz , 6 and Ian T Burke 1...

Extraction of rare earths from bauxite residue red mud ,
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01-04-2018 0183 32 Direct leaching experiments of bauxite residue are performed with HCl and H 2 SO 4 at different concentrations in order to study the behaviour of silicon during acid leaching over time A multi-stage leaching was applied after dry digestion to increase the REEs concentration in the leachate...

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