recovery of vanadium from coal fly ash


Simultaneous recovery of vanadium and nickel from power ...

Highlights: • Leaching of vanadium and nickel from fly ash (14.43% V and 5.19% Ni) in sulfuric acid was performed. • Optimization of leaching parameters was carried out using a response surface methodology. • Using optimum conditions, 94.28% V and 81.01% Ni "actual recovery" was obtained ... Apr 30, 2015· Commercial Recovery of Metals from Coal Fly Ash April 30, 2015 In the midst of the USA EPA's new ruling on management of power station coal ashes in December, a report by Lucid Insight outlines the opportunities and challenges for metal recovery, including commercialisation activities for scandium, titanium, germanium, gallium, vanadium, and ...

RECOVERY OF VANADIUM AND NICKEL FROM PETROLEUM …

RECOVERY OF VANADIUM AND NICKEL FROM PETROLEUM FLYASH Masud A. Abdel-latif Mintek, Randburg, Republic of South Africa [email protected] Key words: Flyash, DC arc furnace, Pre-treatment, Smelting, Vanadium, Nickel, Extraction, Recovery. ABSTRACT Flyash is a powdery residue generated by the power stations that use heavy oil as the Sandra Vitolo, Maurizia Seggiani and Francesco Falaschi, "Recovery of Vanadium from a Previously Burned Heavy Oil Fly Ash", Hydrometallurgy, 62 (December 2001) 145-150. Contact Details: Woo-Teck Kwon . Department of Ceramics Building Materials. Korea Institute of Ceramic Engineering and Technology. 233-5, Gasan-Dong. Guemcheon-Gu, Seoul, 153 ...

Recovery of rare earth elements and Yttrium from Indonesia ...

Rare Earth Element plus Yttrium (REY) is an essential element in the modern industry. Due to its limited supply, REY recovery from alternative sources is needed. Coal fly ash is one of the candidates of REY sources. Coal fly ash taken from the pulverized coal power plant in West Java was used as a raw material in this research. A wide range of opportunity exists for the beneficial reuse and/or recovery of materials from fly ash, with some of the most common endeavors listed below. Alumina Recovery from Fly Ash. One of the primary targets for recovery from fly ash has been alumina; most fly ash contains between 25 – 30% aluminum oxide (Al 2 O 3)¹.

Vanadium recovery from oil sands fly ash | Repository of ...

The fly ash produced during the upgrading of the Alberta oil sands contains between 2.0 and 3.5 wt% vanadium, and represents a significant vanadium resource (3.6 million kilograms per year or 3.5% of total world vanadium production). Research was performed to move vanadium recovery from the oil sands fly ash towards commercialization. Recovery of vanadium from a previously burned heavy oil fly ash

Recovery of vanadium and nickel from oil fly ash ...

Abstract. Oil fly ash (OFA) is a by-product originated from burning of crude and residual oil for energy. OFA is defined as hazardous waste in many countries because it is acidic A vanadium recovery approach utilizes oil fly ash (OFA), in contrast to coal fly ash, for separation and recovery of vanadium. OFA is first carbon burned to reduce the volume for recycling, and also to provide a fuel for other industrial processes. Following an almost 90% weight reduction from carbon burning, the remaining material includes about 18% vanadium.

Coal Ash Beneficiation and Refining Options - Fly Ash

Process for recovering Metals from Coal Ash • The coal ash is heated in a CFBC using coal and the carbon in the ash (LOI) to break the physical bonds of the metals in the ash with the waste heat used for a small T/G or used to by-pass feedwater heaters in the plant. • The ash is chlorinated with the metal chloride (Al, Ti, Fe, and others) treatment system as fly ash. The fly ash from burning petroleum oil is an important secondary resource for vanadium, after the primary resource of the ore concentrates and the metallurgical slag. According to the information in literature [6], hydrometallurgical processing is usually found as the

RARE EARTH ELEMENTS

Coal Ash Beneficiation Through Critical Material Extraction and Recovery .....29 Rare Earth Extraction from Coal Fly Ash .....30 Ionic Liquids as Advanced Solvents for the Extraction of Rare Earth Elements from Coal A process has been developed to recover gallium and vanadium from coal fly ash in which they exist at very low concentration in a mixture of high concentration of less desirable species. Aqueous solution containing 2.8 mg/ l gallium and 35 mg/ l vanadium was obtained by leaching with 1.5 mol/ l sulfuric acid.

(763b) Recovery of Rare Earth Elements from Coal Ash with ...

Vanadium (V), yttrium (Y), lithium (Li), and cobalt (Co) also represent a significant value, and will be evaluated as potential byproducts going forward. Based on the analytical results, the feasibility study focused on a specific PCC fly ash as a feedstock for the ADP. The PCC plant fly ash had a higher Total REE+Y+Sc concentration than Simultaneous recovery of vanadium and nickel from power plant fly-ash: optimization of parameters using response surface methodology. Nazari E(1), Rashchi F(2), Saba M(1), Mirazimi SM(1). Author information: (1)School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, P.O. Box 11155/4563, Tehran, Iran.

Commercial Recovery of Metals from Coal Ash - Fly Ash

Commercial Recovery of Metals from Coal Ash Author: Bradshaw, Dale T.;Tolhurst, Lucinda Subject: 2015 World of Coal Ash (WOCA) Conference in Nasvhille, TN - May 5-7, 2015 Keywords: coal ash, fly ash, metal recovery, metal extraction, aluminium, scandium, gallium, … Coal fly ash samples (designated here as fly ash samples A, B, and C) were collected from three U.S. coal-fired powerplants. One plant produces coal fly ash (fly ash C) from low-sulfur coal mined in the Powder River Basin of Wyoming and Montana (see map below), whereas the other two plants produce coal fly ash

Coal's other dark side: Toxic ash that can ... - Environment

About 10 percent of the coal, the non-combustible part, becomes coal ash—powdery fly ash that collects in smokestack filters, and coarser bottom ash and boiler slag that gets flushed out of the ... Today coal is among the most important energy sources. In order to meet the world's energy demands, low-calorie lignite with a high ash content is generally used in the large capacity coal-fired thermal power plants. As a result of coal firing, wastes such as fly ash, slag, and flue gas are also produced. Subsequently, toxic trace elements within coal are transferred to wastes such as slag ...

[PDF] Selective Leaching of Vanadium from Boiler Oiled Ash ...

The present work aims to optimize an efficient, economic and environmental hydrothermal method to leach vanadium from boiler ash residue using sodium carbonate and bicarbonate mixture solution. For this purpose, many factors include liquid/solid phase ratio, leaching temperature, leaching time, oxidant addition and it's percent and ash fineness are studied and optimized. From the obtained ... Coal Ash: Hazardous to Human Health . What is coal ash? Coal ash is the waste that is left after coal is combusted (burned). It includes fly ash (fine powdery particles that are carried up the smoke stack and captured by pollution control devices) as well as coarser materials that fall to the bottom of the furnace. Most coal ash comes from coal ...

xtraction and separation of vanadium and nickel from fly ...

Corpus ID: 174768913. xtraction and separation of vanadium and nickel from fly ash produced in heavy uel power plants ohammad @inproceedings{AlGhoutia2011xtractionAS, title={xtraction and separation of vanadium and nickel from fly ash produced in heavy uel power plants ohammad}, author={A. Al-Ghoutia and Yahya S. Al-Degsd and Ayoup M. Ghrair and Hani Khourye and Mahmoud Ziedanf}, year={2011} } Vanadiferous magnetite iron ores are used for producing vanadium as well. In addition, it is known that vanadium can be recovered from the ashes of crude oil and petroleum coke. The process for treating boiler residues, fly ash and petroleum coke is similar to the process used to …

Coal Ash, Fly Ash, Bottom Ash, and Boiler Slag | NRDC

Bottom ash is the coarser component of coal ash, comprising about 10 percent of the waste. Rather than floating into the exhaust stacks, it settles to the bottom of the power plant's boiler. Lisa JN Bradley, Ph.D., DABT . Coal Ash Material Safety A Health Risk-Based Evaluation of USGS Coal Ash Data from Five US Power Plants 2013 World of Coal Ash Conference (April 22-25, 2013) in Lexington, Kentucky ()

Project Completion Fact Sheet - US EPA

(cy) of coal ash was released into Swan Pond Embayment and three adjacent sloughs, eventually spilling into the main Emory River channel. The release extended approximately 300 acres outside of the fly ash dewatering and storage areas of the plant. Recovery of vanadium and nickel from an oil fly ash is studied in a two‐step leaching process, carried out under ambient pressure without calcination. In the leaching, nickel is dissolved with NH 4 Cl in the first step, followed by vanadium leaching with Na 2 CO 3 in the second step.

Kingston Ash Recovery Project Non - Time - Critical ...

occur naturally in coal (TVA 2009a). The ash has therefore been tested for naturally-occurring metals and radionuclides. The constituents of interest in fly ash include arsenic, chromium, copper, lead, mercury, nickel, selenium, thallium, vanadium, zinc, and … Coal combustion residues and other geological waste materials have been proposed as a resource for rare earth elements (REEs, herein defined as the 14 stable lanthanides, yttrium, and scandium). The extraction of REEs from residues often generate acidified leachates that require highly selective separation methods to recover the REEs from other major soluble ions in the leachates.

Fuel Ash Corrosion

The corrosive species are different for coal and oil-fired boilers. Mixtures of vanadium pentoxide and sodium oxide or vanadium pentoxide and sodium sulfate are the principal offensive compounds in oil ash. For coal-fired boilers, sodium and potassium iron trisulfates are the liquid species blamed for high-temperature corrosion. DEW-POINT CORROSION @article{osti_21023865, title = {Vanadium recovery from oil fly ash by leaching, precipitation and solvent extraction processes}, author = {Navarro, R and Guzman, J and Saucedo, I and Revilla, J and Guibal, E.}, abstractNote = {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 ...

The Power Industry relies on Ion Exchange for Treatment of ...

Coal ash is a waste product of coal combustion used for electrical power generation. Fly ash (from smoke stacks) and bottom ash (from boilers and combustion chambers) may contain trace metals including aluminum, arsenic, cadmium, chrome, copper, mercury, nickel, lead, selenium, vanadium… Vanadium Separation From Fly Ash - … Brevet WO2004090179A1 - Method of recovering . Abstract Disclosed is a method of recovering a vanadium oxide flake from diesel oil fly-ash …

Recovery of vanadium and nickel in fly ash from heavy oil ...

Recovery of vanadium and nickel from an oil fly ash is studied in a two‐step leaching process, carried out under ambient pressure without calcination. In the leaching, nickel is dissolved with NH 4 Cl in the first step, followed by vanadium leaching with Na 2 CO 3 in the second step. Coal combustion residues and other geological waste materials have been proposed as a resource for rare earth elements (REEs, herein defined as the 14 stable lanthanides, yttrium, and scandium). The extraction of REEs from residues often generate acidified leachates that require highly selective separation methods to recover the REEs from other major soluble ions in the leachates.

(PDF) Recovery of vanadium from a previously burned heavy ...

Recovery of vanadium from a previously burned heavy oil fly ash Though vanadium recovery was not complete from oil fly ash (with a 70% recovery level), the proposed procedure allowed an efficient, simple and complete recovery of vanadium (greater than 98%) from the leachate in the form of a pure product, that could be valorized. Improving the process would consist in increasing vanadium leaching efficiency.

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. Germanium recovery from coal fly ash by hydrometallurgical procedures was studied at the pilot scale (5 kg of fly ash/h). Results were used to design the equipment of a demonstration-sized plant ...