Resources and extraction of gallium: A review
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 …
اقرأ أكثر
A sustainable method for germanium, vanadium and lithium extraction …
DOI: 10.1016/j.fuel.2021.122844 Corpus ID: 245243985; A sustainable method for germanium, vanadium and lithium extraction from coal fly ash: Sodium salts roasting and organic acids leaching
اقرأ أكثر
A method for synergistic extraction of aluminum, silicon, …
A technology of fly ash and combined method, applied in the direction of silicate, improvement of process efficiency, alkaline earth metal silicate, etc., can solve the problems of long treatment process, failure to fully utilize lithium resources, high energy consumption, etc., and achieve cost reduction Low, mild reaction conditions, high …
اقرأ أكثر
A zero-emission collaborative treatment method for brown corundum fly
1. Introduction. In recent years, with the rapid development of semiconductors, new energy and other fields, the market demand for gallium has increased rapidly [1], [2], [3].However, the distribution of gallium in nature is highly fragmented, making it difficult to find independent deposits suitable for extraction [4].Currently, …
اقرأ أكثر
Method for extracting gallium from fly ash
Method for extracting gallium from fly ash Download PDF Info ... Prior art keywords gallium fly ash eluent magnetic eluting Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
اقرأ أكثر
Recovery of gallium and vanadium from gasification fly ash
Abstract. The Puertollano Integrated Coal Gasification Combined Cycle (IGCC) Power Plant (Spain) fly ash is characterized by a relatively high content of Ga and V, which occurs mainly as Ga2O3 and ...
اقرأ أكثر
The direct adsorption of low concentration gallium from fly ash
A number of technologies, e.g. acid and alkali methods or salt activation method, have been developed to extract Ga and Al from the Jungar high-Al 2 O 3 fly ashes (Guo et al. 2013;Feng et al. 2014 ...
اقرأ أكثر
Recovery of gallium from coal fly ash | Semantic Scholar
Environmental Science, Chemistry. 2016. ABSTRACT This study is mainly focused on the direct adsorption of low concentration gallium from the feed solution in pre-desilication soda-lime sintering process from coal fly ash. The adsorption…. Expand.
اقرأ أكثر
Method for extraction of iron, aluminum and titanium from coal ash
Abstract. This patent describes a method for the recovery of iron, aluminum, and titanium from coal ash. This method consists of: (a) magnetically extracting magnetite from the ash, (b) leaching the ash with a solution of a mineral acid selected from the group consisting of sulfuric, hydrochloric, and nitric acids, (c) precipitating and removing …
اقرأ أكثر
Method for extracting gallium from fly ash
EP2565283A1 EP11774393A EP11774393A EP2565283A1 EP 2565283 A1 EP2565283 A1 EP 2565283A1 EP 11774393 A EP11774393 A EP 11774393A EP 11774393 A EP11774393 A EP ...
اقرأ أكثر
Hydrometallurgical Recovery of Germanium from Coal Gasification Fly Ash
This article is concerned with a simple hydrometallurgical method for the selective recovery of germanium from fly ash (FA) generated in an integrated gasification with combined cycle (IGCC) process. The method is based on the leaching of FA with water and a subsequent concentration and selective separation of germanium by a …
اقرأ أكثر
Recovery of gallium and vanadium from gasification fly ash
The optimal Ga extraction conditions was determined as 25 °C, NaOH 0.7–1 M, NaOH/FA ratio of 5 L/kg and 6 h, attaining Ga extraction yields of 60–86%, equivalent to 197–275 mg of Ga/kg of fly ash. Re-circulation of leachates increased initial Ga concentrations (25–38 mg/L) to 188–215 mg/L, while reducing both content of impurities ...
اقرأ أكثر
Process for the recovery of gallium and germanium from coal fly ash
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, …
اقرأ أكثر
Germanium and Gallium Extraction from Gasification Fly Ash
The comparison of Ge extraction yields obtained for 13 IGCC fly ash samples in the same extraction conditions (25oC, water/fly ash ratio of 10 L/kg and 24 h leaching period) revealed that generally Ge yielded a lower extraction percentage (40-50 %) at high limestone dosages (4 %) than reached (53-91 %) when those are reduced down to 2 …
اقرأ أكثر
Recovery of gallium from coal fly ash
Abstract. A study has been made on the extraction of gallium from coal fly ash. A process which includes acid leaching, impurity removal, extraction of gallium and its purification has been suggested. The relatively moderate conditions of temperature, acid strength and time should be chosen in acid leaching to obtain the most efficient ...
اقرأ أكثر
METHOD FOR EXTRACTING GALLIUM FROM FLY ASH
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 hydrochloride acid (2) to obtain hydrochloric acid leachate; adsorbing gallium in the hydrochloric acid leachate with macro-porous cationic resin, followed by ...
اقرأ أكثر
Exploring a promising technology for the extraction …
Yu Gu. 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 …
اقرأ أكثر
Method for extracting gallium from fly ash
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 …
اقرأ أكثر
Research on the Source and Recovery Methods of Gallium
Different extraction methods are used to recover gallium from different sources, such as zinc ore, bauxite, fly coal ash, and other minerals. This paper briefly introduces the …
اقرأ أكثر
Metals | Free Full-Text | Investigation on the Effect of
Coal fly ash (CFA) provides important resources of gallium, which is regarded as an irreplaceable material in many technologies. A prospective roasting reagent assisted acid leaching process was proposed for the purpose of extracting gallium. The extraction efficiency of gallium by NaF (sodium fluoride) roasting followed by HNO3 …
اقرأ أكثر
Novel surface molecularly imprinted material modified multi …
The interest in gallium (Ga) recovery from coal fly ash has been driven by its rapidly growing demand for manufacturing and its extraction can facilitate the effective use of coal fly ash, which ...
اقرأ أكثر
Novel surface molecularly imprinted material modified multi …
Furthermore, as solid extraction material, the imprinted sorbent was applied successfully for extraction of Ga(III) ion from fly ash lixivium followed by FAAS detection. Some methods have been used for the determination of gallium summarized in Table 6. Each method has its advantages and limitations.
اقرأ أكثر
METHOD FOR EXTRACTING GALLIUM FROM FLY ASH
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 hydrochloride acid to obtain hydrochloric acid leachate; adsorbing gallium contained in the hydrochloric acid leachate with macro-porous cationic resin, followed by eluting to …
اقرأ أكثر
Exploring a promising technology for the extraction …
Abstract. 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 …
اقرأ أكثر
Two methods for extracting gallium from fly ash
A method for extracting gallium from circulating fluidized bed fly ash from coal combustion, comprising the steps of: a) grinding the fly ash to a particle size which …
اقرأ أكثر
Germanium and Gallium Extraction from …
Based on the Ge and Ga speciation in the Puertollano IGCC fly ash, a sequential extraction procedure based on a starting water leaching step for the extraction of Ge …
اقرأ أكثر
Leaching of Gallium from Coal Fly Ash, Alumina and …
the precious metal from coal fly ash. 8,9. Zhao et. al. 7. reported sulfuric acid leaching of Ga from coal fly ash for the subsequent sequential recovery of Ga using P507 and Cyanex 272 ...
اقرأ أكثر
Metals | Free Full-Text | Investigation on the Effect of …
Abstract. Coal fly ash (CFA) provides important resources of gallium, which is regarded as an irreplaceable material in many technologies. A prospective roasting reagent assisted acid leaching …
اقرأ أكثر
A clean method for gallium recovery and the coproduction …
A clean method for gallium recovery and the coproduction of silica-potassium compound fertilizer and zeolite F from brown corundum fly ash ... A novel method was proposed for extracting Ga and the coproduction of SPCF and zeolite F from BCFA. During the hydrothermal leaching process, BCFA underwent dissolution and …
اقرأ أكثر
Method for secondarily extracting gallium and germanium from fly ash
The invention relates to a method for secondarily extracting gallium and germanium from fly ash, which is characterized in that lignite with high quality the heating value of which is larger than 20300kj/kg and fly ash are mixed according to a mass ratio of 0.3 to 0.5 : 1 and are cracked to granularity below 40 meshes; a mixture material the …
اقرأ أكثر