• Recovery of metals and other beneficial products from coal

    · Vitolo et al used this method for the recovery of V from a fly ash at temperatures of 650–1150 °C, followed by an acid leaching and oxidative precipitation of vanadium pentoxide Overall, this process yielded 83 % V US Patent No B2 ( 2003 ) also employed this method for the recovery of V from carbonaceous residues

  • Cited by: 62
  • Recovery of gallium and vanadium from gasification fly ash

    The extraction of vanadium from fly ash of stone coal combustion in China was studied by alkaline leaching The fly ash was characterized by a relatively high content of V5+ in silicon and

  • RECOVERY OF VANADIUM AND NICKEL FROM OIL FLY ASH

    CFA Coal fly ash D2EHPA Di(2ethylhexyl)phosphoric acid EHEHPA 2ethylhexylphosphonic acid mono2ethylhexyl ester ESP Electrical static precipitators OFA Oil fly ash RCE Rotating cylinder electrode TBP Trinbutyl phosphate TOA Trioctylamine

  • Vanadium recovery from oil fly ash by leaching

    · The proposed treatment for the recovery of vanadium from oil fly ash is complex, requiring a series of processing steps that make vanadium valorization economically debatable However, considering vanadium as a byproduct of the washing of oil fly ash, its recovery may contribute, at least, to reduce the net cost of the treatment by the production of valorizable sub

  • Cited by: 228
  • Recovery of gallium and vanadium from gasification fly

    · 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 Ga 2 O 3 and as Ga 3+ and V 3+ substituting for Al 3+ in the Al–Si fly ash glass matrix Investigations focused on evaluating the potential recovery of Ga and V from these fly ashes

  • Recovery of Gallium and Vanadium from Coal Fly Ash

    Recovery of Gallium and Vanadium from Coal Fly Ash Izumi Tsuboi 1), Shigetami Kasai 1), 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 28 mg/l gallium and 35 mg/l vanadium was obtained by leaching with 15 mol/l sulfuric

  • Commercial Recovery of Metals from Coal Fly Ash

    · There is a common belief that all fly ash produced in Europe is being utilised in construction already, but this predominately applies to Class C ashes, not the noncementitious Class F ashes, and data suggests that even now over 40% of the total fly ash is underutilised (low value fill material) or unutilised In addition, some of the leading players in metal recovery are developing

  • RECOVERY OF VANADIUM AND NICKEL FROM OIL FLY ASH

    CFA Coal fly ash D2EHPA Di(2ethylhexyl)phosphoric acid EHEHPA 2ethylhexylphosphonic acid mono2ethylhexyl ester ESP Electrical static precipitators OFA Oil fly ash RCE Rotating cylinder electrode TBP Trinbutyl phosphate TOA Trioctylamine

  • Vanadium recovery from oil sands fly ash | Repository of

    The fly ash produced during the upgrading of the Alberta oil sands contains between 20 and 35 wt% vanadium, and represents a significant vanadium resource (36 million kilograms per year or 35% of total world vanadium production) Research was performed to move vanadium recovery from the oil sands fly ash towards commercialization Salt roasting tests on Suncor ash samples collected over a

  • Chapter 612 Vanadium World Health Organization

    fine fly ash with a long atmospheric residence time Vanadium concentrates on the surface of particulate matter from coal combustion The concentration of vanadium in fly ash from residual fueloil burning averages around 8% (range 218%), representing 56% (3974%) of the vanadium concentration in fuel The soluble fraction of fly ash vanadium

  • recovery of vanadium from coal fly ash

    Recovery of Gallium and Vanadium from Coal Fly Ash 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 speci Aqueous solution containing 28 mg/l gallium and 35 mg/l vanadium was obtained by leaching with 15 mol/l sulfuric ac These metals were then concentrated by

  • Value in Waste: Fly Ash Reuse and Recovery Opportunities

    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 Some sources of fly ash in China have been shown to contain as much as 45% alumina ² In addition to its use in producing aluminum metal, alumina is used throughout a host of industries as a catalyst, pigment, abrasive, and a long list of other materials

  • Challenges in Metal Extraction From Coal Ash

    · Commercial metal extraction from coal is not a new idea Vanadium and silver extraction from enriched coal sources dates back to the 1800s, and germanium extraction is still active by companies such as Umicore When coal is combusted, some valuable components can be found in the fly ash captured by the electrostatic precipitators and/or fabric filters commonly applied at coalfired

  • Economical recovery of fly ashderived magnetics and

    Request PDF | On Jan 1, 2009, J Groppo and others published Economical recovery of fly ashderived magnetics and evaluation for coal cleaning | Find, read and cite all the research you need on

  • Recovery of Gallium and Vanadium from Coal Fly Ash

    Recovery of Gallium and Vanadium from Coal Fly Ash Izumi Tsuboi 1), Shigetami Kasai 1), 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 28 mg/l gallium and 35 mg/l vanadium was obtained by leaching with 15 mol/l sulfuric

  • VANADIUM RECOVERY METHOD Worcester Polytechnic

    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 A salt roasting performed at the

  • Chapter 612 Vanadium World Health Organization

    fine fly ash with a long atmospheric residence time Vanadium concentrates on the surface of particulate matter from coal combustion The concentration of vanadium in fly ash from residual fueloil burning averages around 8% (range 218%), representing 56% (3974%) of the vanadium concentration in fuel The soluble fraction of fly ash vanadium

  • (PDF) Recovery of vanadium from a previously burned

    Recovery of vanadium from a previously burned heavy oil fly ash Hydrometallurgy, 2001 Maurizia Seggiani

  • recovery of vanadium from coal fly ash

    Recovery of Gallium and Vanadium from Coal Fly Ash 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 speci Aqueous solution containing 28 mg/l gallium and 35 mg/l vanadium was obtained by leaching with 15 mol/l sulfuric ac These metals were then concentrated by

  • Value in Waste: Fly Ash Reuse and Recovery Opportunities

    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 Some sources of fly ash in China have been shown to contain as much as 45% alumina ² In addition to its use in producing aluminum metal, alumina is used throughout a host of industries as a catalyst, pigment, abrasive, and a long list of other materials

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

    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

  • Challenges in Metal Extraction From Coal Ash

    · Commercial metal extraction from coal is not a new idea Vanadium and silver extraction from enriched coal sources dates back to the 1800s, and germanium extraction is still active by companies such as Umicore When coal is combusted, some valuable components can be found in the fly ash captured by the electrostatic precipitators and/or fabric filters commonly applied at coalfired

  • Extraction of vanadium from athabasca tar sands fly

    Although the recovery of vanadium from petroleum ash is a well established commercial practice, it is shown in the present work that such processes are not suitable for recovery of vanadium from the GCOS fly ash The fact that the GCOS fly ash behaves so differently when compared to other petroleum fly ash is attributed to its high silicon and aluminum contents which tie up the metal values in

  • Fly ash Wikipedia

    Fly ash or flue ash, also known as pulverised fuel ash in the United Kingdom, or coal combustion residuals (CCRs), is a coal combustion product that is composed of the particulates (fine particles of burned fuel) that are driven out of coalfired boilers together with the flue gasesAsh that falls to the bottom of the boiler's combustion chamber (commonly called a firebox) is called bottom ash

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