Extraction and separation of vanadium and nickel from fly
Before disposing fly ash into the environment, it is important to extract/separate the valuable elements like V and Ni and to check up the mobility of the rest of cations which would be beneficial to the soil
Vanadium recovery from oil fly ash by leaching, precipitation and
The present work focuses on the design of integrated processes for vanadium recovery from oil fly ash The pro cesses firstly consist in a leaching step, either alkaline or
Extraction of vanadium from athabasca tar sands fly ash Springer
Today's commercially proven technology to recover fly ash also resulted from burning Venezuelan r sidual oil from the Athabasca tar ands, a practiced by oils and
Extraction and separation of vanadium and nickel from fly ash
Large amounts of fly ash are produced as a result of burning diesel fuel in power stations Ni is selectively eluted from the FA using NH 3 solution and was
Vanadium Recovery from Oil Fly Ash by Carbon Removal and
This research mainly focuses on the recovery of vanadium from oil fly ash by carbon removal and the roastleach process The oil fly ash contained about
Spentmedium leaching of germanium, vanadium and lithium
A sustainable method for germanium, vanadium and lithium extraction from coal fly ash: sodium salts roasting and organic acids leaching Fuel,312 ( 2022 ),
A sustainable method for germanium, vanadium and lithium
A sustainable method for germanium, vanadium and lithium extraction from coal fly ash: Sodium salts roasting and organic acids leaching Homa Rezaei a,
A sustainable method for germanium, vanadium and lithium
Volume 312, 15 March 2022, Full Length Article A sustainable method for germanium, vanadium and lithium extraction from coal fly ash: Sodium salts roasting
Recovery of vanadium and nickel from heavy oil fly ash (HOFA): a
HOFA is considered a hazardous waste because it contains considerable amounts of heavy metals However, it contains significant amounts of vanadium “V” and nickel “Ni”, which
Ultrasoundassisted leaching of vanadium from fly
There are several published reports about the extraction of valuable metals from power plant ashes using bioleaching in the literature 1,2,7 Leaching using a fruit juice has not been reported before This work used organic
Extraction and separation of vanadium and nickel from fly ash
Vanadium metal was selectively extracted (95%) with 01–02 M H 2 SO 3 at 323–363 K, with an ash/reagent ratio of 1/4 and extraction time of 45 min [15] In a similar study, FA was heated at moderate temperatures (150 °C), a decarburization and desulphurisation (pretreatment) stage, and finally a smelting step in an electricarcfurnace
Extracting vanadium pentoxide from minerals and composite
Vanadium extraction from fly ash Fly ash specifically refers to the soot collected after burning fuel and coal, which is enriched with vanadium and can be used as a source of vanadium Fly ash is generally treated by leaching with water, alkali, or acid solutions, where vanadium is separated from other impurities
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 solvent
A Critical Review of Extraction Methods for Vanadium from Petcoke Ash
Petcoke is a solid carbonrich residue produced during petroleum refining Petcoke mineral matter is rich in vanadium that, when alloyed with other metals, can significantly improve its properties Vanadium extraction from steel slags is well studied, while extraction from secondary sources such as petcoke is not well understood
Fly Ash Cement Australia
Concretegrade fly ash is a supplementary cementitious material that delivers improved laterage strength, workability and enhances the durability properties of concrete It is commonly used as a 20% 30% cement replacement in concrete Grade 1 Fly Ash is used as a single product or may be blended to produce a Fly Ash Blended Cement
Ecological treatment of El Kriymat boiler ash for recovering vanadium
Extraction procedure Preparation of pregnant solution The workable sulfate leach liquor for V, Ni, and Zn extraction was made by combining 645 g of the magnetic fraction concentrate from boiler fly ash with 180 g/L H 2 SO 4 under optimal agitation leaching conditions The final volume of the produced sulfate leach liquid (after
Integrated Disposal Scheme of Heavy Fuel Oil Flyash in Saudi
Results of water extraction indicated that concentrations of metals such as chromium, nickel and vanadium, in the extract, were in the range of 189–305, 559–2113 and 270–6260mg/l, respectively Lokeshappa B, Dikshit AK: Single step extractions of metals in coal fly ash Res Environ 2, 1–8 (2012)
Vanadium Recovery from Oil Fly Ash by Carbon Removal and
This research mainly focuses on the recovery of vanadium from oil fly ash by carbon removal and the roastleach process The oil fly ash contained about 85% unburned carbon and 22% vanadium by weight A vanadiumenriched product was obtained after carbon removal, and the vanadium content of this product was 19% by
Transformation and Distribution of Vanadium Phases in Stone
The vanadium in fly ash mainly existed in organic matter, aluminosilicate and Fe–Mn oxides, and the other vanadium existed in exchangeable fraction Zhang Yimin, Bao Shenxu, Liu Tao (2012) Effects of the mineral phase and valence of vanadiumon vanadium extraction from stone coal [J] Int J Miner, Metall Mater 19(10):893–898
From Ashes to Riches: Microscale Phenomena Controlling Rare
Coal fly ash is an alternative source of rare earth elements (REEs), which are critical in modern energy and electronic technologies Current hydrometallurgical processes, however, yield variable recovery rates because of the limited understanding of the microscale phenomena controlling the extraction of REEs from fly ash This work
Extraction and separation of vanadium and nickel from fly ash
The results indicated that 9906% of vanadium was extracted and only 795% of aluminum was coextracted in a countercurrent extraction comprising five stages under the optimal conditions; the separation factor (β) of vanadium and aluminum was 1221 9932% of vanadium stripped by 8 mol/L HCl in a countercurrent stripping
Extraction of vanadium from electrostatic precipitator ashes of
A Selective Recovery Condition of Vanadium from Fly Ash Leach Liquor by UVSpectrophotometry Journal of the Korean Institute of Resources Recycling 2016, 25 (6) Extraction and separation of vanadium and nickel from fly ash produced in heavy fuel power plants Chemical Engineering Journal 2011, 173 (1)
Production of Pure Vanadium: Industry Review and Feasibility
Recycle means that facility processes spent catalysts, oil residues, fly ash and other industrial wastes rich in This work adds data to the public domain on the EBM refining of commercially available vanadium alloys Countries, companies, (1993) Extraction of vanadium from an industrial waste High Temp Mater Process 11:
Transformation and Distribution of Vanadium Phases in Stone
of Vanadium Phases in Stone Coal and Combustion Fly Ash Deng Zhigan, Tang Fuli, Wei Chang, Fan Gang, Li Minting, Li Xingbin, and Li Cunxiong Abstract Stone coal is a kind of carbonaceous shale that contains vanadium The sequential chemical extractions were adopted to analyze the vanadium phases of stone coal and its combustion fly ash
Vanadium recovery from oil fly ash by leaching, precipitation and
In order to reduce the environmental impact due to land disposal of oil fly ash from power plants and to valorize this waste material, the removal of vanadium was investigated using leaching processes (acidic and alkaline treatments), followed by a second step of metal recovery from leachates involving either solvent extraction or selective
Phase transformation mechanism of boiler ash roasted with
Boiler ash, or oil ash, is a solid waste produced by burning heavy fuel oil (HFO) in electrical power plants In addition to carbon, it usually contains V (44–192%) and Ni (27–85%), and therefore, they are regarded as promising resources for vanadium extraction [1,2,3]More than 4000 metric tons of oil ashes are generated annually from
A Review of RareEarth Elements Extraction with Emphasis on
The concentration of REEs related to the ash was as follows: vanadium: 3322 ppm, Mo: 232 ppm, total rareearth metal content: 2077 ppm, and actinides: 2500 ppm Their proposed process claimed to have a leaching recovery rate of 80–90% using a sequential leaching process (water leaching → dilute alkaline digestion → dilute
A review of metal recovery from spent petroleum catalysts and ash
In a study conducted by Tsai and Tsai (1998), three different leaching reactants were tested on porous unburnt carbon, vanadium, nickel oxide and oilfired fly ash samplesSulfuric acid, sodium hydroxide, water with ammonia were investigated in leaching of fly ash: 65% of vanadium, 60% of nickel, 42% of iron were recovered by 05
Research progress on extraction and recovery of strategic metal
Guo Y X, Zhao Z S, Zhao Q, et al Novel process of alumina extraction from coal fly ash by predesilicatingNa 2 CO 3 activationacid leaching technique[J] Font O, Querol X, Juan R, et al Recovery of gallium and vanadium from gasification fly ash[J] Journal of Hazardous Materials, 2007, 139(3): 413423 44: 张丽宏, 罗焇湝, 程芳琴