method for extracting gallium from fly ash


Extraction of Valuable Metals and Preparation of ...

Extraction of Valuable Metals and Preparation of Mesoporous Materials from Circulating Fluidized Bed-Derived Fly Ash via an Acid−Alkali-Based Alternate Method Zhibin Ma,* Xueli Zhang, Yanxia Guo, and Fangqin Cheng* Cite This: ACS Omega 2020, 5, 31295−31305 Read Online ACCESS Metrics & More Article Recommendations * sı Supporting Information

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Extraction of Heavy Metals from Fly Ash using ...

Extraction of Heavy Metals from Fly Ash using Electrochemical Methods . Sofia Norman December 22, 2010 LITH-IFM-A-EX--10/2381--SE . Linköping University, Department of Physics, Chemistry and …

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Recovery of Gallium From Coal Fly Ash By a Dual Reactive ...

The extraction of gallium from coal fly ash by leaching and extraction with commercial extractants Amberlite LA-2 and LIX 54N dissolved in kerosene was studied. Leaching of gallium and other metals from the fly ash was carried out with 6 M hydrochloric acid.

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Separation of Gallium from Aluminum in Fly Ash Digested ...

Abstract: It is the first time to determine whether gallium in fly ash was dissolved out with aluminum and study how to separate gallium from aluminum and recover it, tracking and analyzing the gallium in the digested mother liquor from a power plant fly ash extracting Al 2 O 3 by soda-lime sintering process. Carbon dioxide decomposition was performed to the digested mother liquor, exploring ...

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Extraction of Aluminum Hydroxide from Coal Fly Ash by Pre ...

Using coal fly ash from one thermal power plant in Ningxia, China as the raw material, aluminum hydroxide powder was successfully extracted by pre-desilication, calcination, dissolution and carbonation precipitation processes. The research results indicated that the mullite, Quartz and glass phase in the coal fly ash could be changed into NaSiO3, NaAlO2 and Na2CaSiO4 after the coal fly ash ...

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EP2565284B1 - Method for extracting gallium from fly ash ...

Method for extracting gallium from fly ash Download PDF Info Publication number EP2565284B1. EP2565284B1 EP11774394.8A EP11774394A EP2565284B1 EP 2565284 B1 EP2565284 B1 EP 2565284B1 EP 11774394 A EP11774394 A EP 11774394A EP 2565284 B1 EP2565284 B1 EP 2565284B1 Authority EP European Patent Office Prior art keywords gallium

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Exploring a promising technology for the extraction of ...

The coal fly ash (CFA) in the present study contains a high content of gallium, which is categorized as a strategic metal. Gallium extraction from CFA is an important step toward its reutilization.

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Gallium, Germanium, Indium, Vanadium, Or Molybdenum ...

Method for extracting gallium from fly ash. Patent number: 8728296 Abstract: Disclosed is a method for extracting gallium from fly ash, which comprises the following steps: crushing the fly ash and removing Fe by magnetic separation; then dissolving it by using hydrochloric acid to obtain hydrochloric acid leachate; adsorbing gallium contained ...

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WO2011134402A1 - Method for extracting gallium from …

Disclosed is a method for extracting gallium from fly ash, which comprises the following steps: crushing the fly ash and removing Fe by magnetic separation; then dissolving it by using hydrochloric acid to obtain hydrochloric acid leachate; adsorbing gallium in the hydrochloric acid leachate with macroporous cation resin, followed by eluting to obtain the eluent containing gallium; adding ...

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Germanium and Gallium Extraction from Gasification Fly Ash ...

Increasing the extraction temperature to 50, 90 and 150 °C, Ge extraction yields were kept at similar levels, while reducing the content of impurities, the water/fly ash ratio and extraction time.

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C25C 1 - Electrolytic production, recovery or refining of ...

EP2565284A1 Method for extracting gallium from fly ash : 03/06/2013: EP2565283A1 Method for extracting gallium from fly ash : 03/06/2013: CN202766630U Feed …

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Recovery of gallium and vanadium from gasification fly ash ...

M. Beja. Method for extracting gallium oxide from aluminous substances, US Patent 2,574,008 (1951). Acid extraction process for recovering gallium from fly ash produced by coal combustion Abisheva

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Bohdan Lisowyj Inventions, Patents and Patent Applications ...

Abstract: A method is disclosed for recovering gallium and/or germanium from fly ash which comprises pelletizing the fly ash, treating the pellets in the presence of an oxidizing gas at a temperature of from about 900.degree. C. to just below the fusion temperature of the pellets, treating the pellets in the presence of a reducing gas at the same temperature range, and recovering gallium and ...

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Process for the recovery of gallium and germanium from ...

A method is disclosed for recovering gallium and/or germanium from fly ash which comprises pelletizing the fly ash, treating the pellets in the presence of an oxidizing gas at a temperature of from about 900° C. to just below the fusion temperature of the pellets, treating the pellets in the presence of a reducing gas at the same temperature range, and recovering gallium and/or germanium ...

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Leaching of Gallium from Coal Fly Ash, Alumina and ...

using the solvent extraction method. The values by the two methods were in close agreement according to the Student's t-test with a confidence level of 95%. The limit of detection was 0.45 mg Kg-1. The analytical methodology was applied for the determination of Ga in three coal fly ash samples, two from thermal power plants and a NIST

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CN1868884A - Method of extracting aluminium oxide from fly ...

A process for extracting alumina from powdered coal ash while generating white carbon black includes such steps as grinding powdered coal ash, activating, adding ammonium sulfate, reacting, adding water, filtering, filling ammonia gas into the filtered liquid to obtain the deposited mixture of aluminum hydroxide and iron hydroxide, adding the solution of sodium hydroxide to dissolve the ...

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Removal techniques for heavy metals from fly ash ...

Fang Z, Gesser H (1996) Recovery of gallium from coal fly ash. Hydrometallurgy 41(2):187–200. Article Google Scholar 61. Matjie R, Bunt J, Van Heerden J (2005) Extraction of alumina from coal fly ash generated from a selected low rank bituminous South …

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RU2667592C1 - Method of separation of gallium and aluminum ...

Method consists in conducting a sorption process for the extraction of gallium from alkaline aluminate solutions containing 50–55 g/l Na 2 O, from 0.06 to 10.97 g/L gallium and aluminum 8.2 g/L in the presence of chromium and vanadium with a concentration of 1.38 g/l and 2.57 g/l, respectively.

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Processing to obtain high-purity gallium | SpringerLink

Aside from ore, gallium can be obtained from such industrial sources as the Bayer process caustic liquor that is a byproduct of bauxite processing, flue dust removed from the fume-collection system in plants that produce aluminum by the electrolytic process, zinc refinery residues, gallium scrap materials, and coal fly ash.

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US4475993A - Extraction of trace metals from fly ash ...

A process for recovering silver, gallium and/or other trace metals from a fine grained industrial fly ash associated with a process for producing phosphorous, the fly ash having a silicate base and containing surface deposits of the trace metals as oxides, chlorides or the like, with the process being carried out by contacting the fly ash with AlCl 3 in an alkali halide melt to react the trace ...

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A new method of recycling gallium from yellow phosphorus ...

Because of the low content of Ga, these minerals cannot be directly used for Ga production. Instead, most Ga is recovered from industrial by-products of the aluminum industry and zinc refinery residues, and a small amount of Ga is extracted from coal fly ash …

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The influencing factor study on the extraction of gallium ...

The extraction of Al from Inner Mongolia (China) fly ash by HCl leaching produced a kind of solid waste called red mud (CRM). This red mud contained a great deal of gallium (Ga 2 O 3, 0.305 wt%) and thus it was a very valuable Ga resource.In this work, an easy hydrothermal alkaline leaching method was developed to extract Ga from CRM.

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Study On Dissolution Characteristics Of Gallium And ...

At the same time, every year there is about 30% mining coal used to generate electricity, so it will inevitably lead to the generation of a large amount of fly ash.As the large industrial waste emissions in the world,fly ash will cause significant harm on the enwironment and human health without effective use.Using the high aluminum powder coal ...

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Resources and extraction of gallium: A review - ScienceDirect

In addition to the acid leaching process, the sodium hydroxide extraction method was also evaluated for Ga recovery from fly ash by Oriol et al. (2007). Eight fly ash samples were collected for Ga extraction tests, in which the Ga content ranged from 149 to 320 ppm.

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Recovery of gallium and vanadium from gasification fly ash ...

Assuming extraction efficiencies above 60%, 59 coal fly ash could provide a source of gallium possibly of the same magnitude as bauxite. 21,30 Large stocks of gallium also exist in red mud holding ...

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Novel extraction of valuable metals from circulating ...

The recycling of valuable metals from circulating fluidized bed (CFB)-derived high-alumina fly ash (HAFA) paves the way for ash utilization with high economic benefits. However, obtaining an ideal extraction ratio for metals using a single acid treatment under moderate conditions is difficult. A moderate acid–alkali–based alternate method was used in this study to extract aluminum (Al ...

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Recovery of gallium from coal fly ash - ScienceDirect

The open-cell polyurethane foam sponge proved to be an efficient medium for the solvent extraction of gallium from the complex fly ash leach solution. 200 Zheng Fang, H.D. Gesser/Hydrometallurgy 41 (1996) 187-200 The flowsheet is believed to be economically feasible, although the economics of the process have not been evaluated in detail.

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CN101284668A - Process for abstracting earth silicon ...

A method for extracting silicon dioxide, alumina and gallium oxide from high-alumina fly ash relates to the technology fields of environmental mineralogy and material, chemical industry and metallurgy. The method comprises the main steps as follows: causing the high-alumina fly ash to react with a sodium hydroxide solution; filtering the solution; introducing CO2 to the filtrate for full ...

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【EN】1. method of from aluminous fly-ash, extracting silicon-dioxide, aluminum oxide and gallium oxide, its key step is: A) aluminous fly-ash and sodium hydroxide solution generate the filtrate and the desiliconization flyash filter cake of preparation white carbon black at autoclave internal reaction after-filtration; With the part silicon ...

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JRUB-Need of Gallium Recovery from Waste Samples: A Review

(c) Coal fly ash: Two-stage leaching with hydrochloric acid is employed which fits the needs of the subsequent extraction of gallium by the foam. Before hydrochloric acid is selected, potassium hydroxide and sodium chloride are used as leaching reagents to test the extraction by an amidoxime resin and foam, respectively.

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Research progress in gallium recovery technology--《Modern ...

Gallium recovery technology used to recover gallium from recycle solution in Bayer process, zinc leach residue, coal fly ash and fly ash in the production of yellow phosphorus (treater dust),and its recent progress are discussed. These methods include: precipitation, amalgam electrolysis and extraction for recovering gallium from recycle ...

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Reusable Ionic Liquid Enables Extraction of Precious Rare ...

Turnipseed Family Chair and Professor Ching-Hua Huang, left, and Ph.D. candidate Laura Stoy, right, published research outlining a new method for extracting rare-earth elements from coal fly ash. By Melissa Fralick Researchers from Georgia Tech's School of Civil and Environmental Engineering have discovered a way to extract rare-earth elements—essential ingredients for nearly

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Recovery of metals and other beneficial products from coal ...

Lisowyi B, Hitchcoc DC (1987) Beneficiation of gallium in fly ash. US Patent No. 4686031. Li L, Wu Y, Liu Y, Zhai Y (2011) Extraction of alumina from coal fly ash with sulfuric acid leaching method. Chin J Process Eng 11(2):254–258. Google Scholar Lisowyj B (1986) Method for extracting of iron, aluminium and titanium from coal ash.

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