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removal of iron oxide from fly ash
Recovery of iron oxide from power plant fly ash by
Removal of gangue materials, principally silica and alumina, from a magnetically-separated, iron-rich fraction of bituminous coal fly ash shows promise of yielding an iron ore grade concentrate. As separated, the iron-rich fraction contains 65 to 75 weight percent iron oxides or about 50% of the iron originally in the ash.
Recovery of iron oxide from coal fly ash (Patent) DOE
A high quality iron oxide concentrate, suitable as a feed for blast and electric reduction furnaces is recovered from pulverized coal fly ash. The magnetic portion of the fly ash is separated and treated with a hot strong alkali solution which dissolves most of the silica and alumina in the fly ash, leaving a solid residue and forming a
Characterisation and removal of iron from fly ash of
Jan 01, 2001 The NaHMP plays an important role in the separation of iron and aluminum oxide mixture (Prakash et al., 1999). Hence magnetic separation of fly ash with and without NaHMP at various magnetic intensities has been carried out and is shown in Figure 1. It can be seen that removal of iron oxide is better at 1.6 kg/t of NaHMP.
US4386057A Recovery of iron oxide from coal fly ash
A high quality iron oxide concentrate, suitable as a feed for blast and electric reduction furnaces is recovered from pulverized coal fly ash. The magnetic portion of the fly ash is separated and treated with a hot strong alkali solution which dissolves most of the silica and alumina in the fly ash, leaving a solid residue and forming a precipitate which is an acid soluble salt of
Phosphate Ion Removal from Aqueous Solution Using an Iron
Microstructures of Fly Ash and Iron Oxide/Fly Ash Adsorbents Property Fly ash Iron oxide/fly ash S BET (m2/g) 1.159 1.896 Total pore diameter (nm) 0.073 0.102 Average pore volume (cm3/g) 20.3 28.6 Figure 1.Scanning electron micrographs of (a) fly ash and (b) the composite adsorbent. (a) (b)
Characterisation and removal of iron from fly ash of
Jan 01, 2001 The NaHMP plays an important role in the separation of iron and aluminum oxide mixture (Prakash et al., 1999). Hence magnetic separation of fly ash with and without NaHMP at various magnetic intensities has been carried out and is shown in Figure 1. It can be seen that removal of iron oxide is better at 1.6 kg/t of NaHMP.
Recovery of iron oxide from coal fly ash (Patent) DOE
@article{osti_864567, title = {Recovery of iron oxide from coal fly ash}, author = {Dobbins, Michael S and Murtha, Marlyn J}, abstractNote = {A high quality iron oxide concentrate, suitable as a feed for blast and electric reduction furnaces is recovered from pulverized coal fly ash. The magnetic portion of the fly ash is separated and treated with a hot strong alkali solution which dissolves
US4386057A Recovery of iron oxide from coal fly ash
A high quality iron oxide concentrate, suitable as a feed for blast and electric reduction furnaces is recovered from pulverized coal fly ash. The magnetic portion of the fly ash is separated and treated with a hot strong alkali solution which dissolves most of the silica and alumina in the fly ash, leaving a solid residue and forming a precipitate which is an acid soluble salt of
Improving Fly Ash Brightness with Carbon and Iron Oxide
In this paper, the brightness of fly ash is improved by carbon removal by heating and iron-containing oxides removal by acid treatment using a two-step method to realize the application of fly ash as filler or coating in the future, which not only increases the range of resource utilization of fly ash, but also reduces dust pollution. The modification results show that the brightness of fly
Uranium Removal from Aqueous Solution by Zeolite from Fly
Uranium Removal from Aqueous Solution by Zeolite from Fly Ash-Iron Oxide Magnetic Nanocomposite Denise A. Fungaro 1, Mitiko Yamaura 2, Gabriel R. Craesmeyer 3 Abstract The adsorption characteristic of zeolite was combined in a composite with the magnetic properties of iron oxide to produce magnetic adsorbent material. Magnetite
Synthesis of hydrous iron oxide/aluminum hydroxide
Apr 01, 2017 Fly ash is rich in aluminum and iron oxides, and is thought to be a very important source of pre-mined material. Hence, many researchers have studied the ash leachability under acidic conditions for the extraction of alumina, iron and other heavy metal elements.
Optimization of pervious concrete containing fly ash and
Sep 15, 2015 To the authors’ knowledge, this was the first of its kind studying the physico-mechanical and hydrological properties and water purification potential of the FA-added PCPC with iron-oxide nanoparticles as an admixture. 2. Materials and methodology2.1. Portland cement, fly ash
Adsorptive removal of five heavy metals from water using
Jul 13, 2017 The high content of SiO 2 in fly ash (Table 1) may have resulted in the low PZC of fly ash. In comparison to fly ash, the furnace slag had a higher PZC, probably due to the high contents of Fe and Ca oxides. SiO 2 is known to have a PZC of 2.0–3.7 (Parks 1965), Fe 2 O 3 of 5.5–9.0 (Parks 1965) and CaO of 11.8 (Oladoja et al. 2012).
Characterization of fly ash ceramic pellet for phosphorus
Mar 15, 2017 Fly ash has been considered as an efficient and cheap byproduct for P absorption because it is readily available and rich in calcium (Ca), aluminium (Al), iron (Fe) oxides (Allred, 2010). But fly ash also contains toxic heavy metals such as mercury (Hg), chromium (Cr), lead (Pb), arsenic (As), copper (Cu), and cadmium (Cd), which can have
Removal of cadmium from aqueous solutions using industrial
Feb 14, 2018 Fly ash and Bayer residue can successfully adsorb TOC, nutrients and Cu . Sorbents synthesized from coal fly ash and geopolymer are efficient for lead removal . However, coal fly ash removes heavy metal ions with low efficiency. Zerovalent iron nano particles have been investigated as a new material for the treatment of contaminated water.
Journal of Physics: Conference Series PAPER OPEN ACCESS
Mercury removal in wastewater by iron oxide nanoparticles To cite this article: E Vélez et al 2016 J. Phys.: Conf. Ser. 687 012050 View the article online for updates and enhancements. Related content Enhanced mercury removal from fix-bed reactor by lamella manganese oxide sorbents H W Cheng and C T Yu-Optimized Production of Coal Fly Ash
Aluminum recovery from coal fly ash by high temperature
Removal of gangue materials, principally silica and alumina, from a magnetically-separated, iron-rich fraction of bituminous coal fly ash shows promise of yielding an iron ore grade concentrate. As separated, the iron-rich fraction contains 65 to 75 weight percent iron oxides or about 50% of the iron originally in the ash.
Removal of radium from acidic solutions containing same by
A high quality iron oxide concentrate, suitable as a feed for blast and electric reduction furnaces is recovered from pulverized coal fly ash. The magnetic portion of the fly ash is separated and treated with a hot strong alkali solution which dissolves most of the silica and alumina in the fly ash, leaving a solid residue and forming a
Improving Fly Ash Brightness with Carbon and Iron Oxide
In this paper, the brightness of fly ash is improved by carbon removal by heating and iron-containing oxides removal by acid treatment using a two-step method to realize the application of fly ash as filler or coating in the future, which not only increases the range of resource utilization of fly ash, but also reduces dust pollution. The modification results show that the brightness of fly
Removal of radium from acidic solutions containing same by
A high quality iron oxide concentrate, suitable as a feed for blast and electric reduction furnaces is recovered from pulverized coal fly ash. The magnetic portion of the fly ash is separated and treated with a hot strong alkali solution which dissolves most of the silica and alumina in the fly ash, leaving a solid residue and forming a
Influence of Fly Ash on High Temperature Desulfurization
The understanding of the influence of the deposited dust on the desulfurization performance of sorbent is of significance for developing a combined process for simultaneous desulfurization and dust removal in hot gas cleanup. In this paper, the influence of fly ash from a fluidized-bed coal gasifier on the desulfurization performance of iron oxide sorbent made by a kind of waste material
The Magnetic Fraction of Coal Fly Ash: Its Separation
Chemical analysis shows that coal fly ash contains valuable metal constituents, the major ones being aluminum and iron. Figure 2 pre sents analytical information for fly ash recovered from bituminous coals mined in the United States (5,6). A typical fly ash will contain about 18 wt. percent iron oxide and about 20 wt. percent aluminum oxide.
Experimental Study on Influence of Fly Ash on Mercury
The presence of iron oxide on the fly ash surface can promote the capability of photocatalytic removal of mercury by fly ash. The presence of ultraviolet light can significantly promote Hg0 oxidize to Hg2+ by fly ash. Thus the oxidized mercury in the flue gas can be easily absorbed by the solution.
Synthesis of hydrous iron oxide/aluminum hydroxide
nicipal solid waste (MSW), cement, sand, activated alumina (AA), silica oxide and alginate beads had proper affinities for high Cr (VI) removal efficiency. Recently, we have found a new type of coal fly ash with iron oxide and aluminum oxide contents of approximately 18.07 and
Removal of Crystal Violet by wet oxidation with H2O2 over
Fly Ash (FA) was employed in this research to treat contaminated wastewater. Generally, a preliminary washing treatment of raw FA with ultra pure water was necessary. Rather FA provided a high surface area for the deposition of iron oxide from its precursor solution; it also acted as a support during wet impregnation process.
Removal of dyes by a novel fly ash–chitosan–graphene oxide
A novel graphene oxide-based adsorbent (FCGO) is synthesized from fly ash cross-linked with chitosan and graphene oxide and characterized through scanning electron microscopy, X-ray diffraction and Fourier transform infrared analyses. The adsorbent effectively removes anionic and cationic dyes, namely, acid red GR
Adsorptive removal of five heavy metals from water using
Jul 13, 2017 The high content of SiO 2 in fly ash (Table 1) may have resulted in the low PZC of fly ash. In comparison to fly ash, the furnace slag had a higher PZC, probably due to the high contents of Fe and Ca oxides. SiO 2 is known to have a PZC of 2.0–3.7 (Parks 1965), Fe 2 O 3 of 5.5–9.0 (Parks 1965) and CaO of 11.8 (Oladoja et al. 2012).
Removal of cadmium from aqueous solutions using industrial
Feb 14, 2018 Fly ash and Bayer residue can successfully adsorb TOC, nutrients and Cu . Sorbents synthesized from coal fly ash and geopolymer are efficient for lead removal . However, coal fly ash removes heavy metal ions with low efficiency. Zerovalent iron nano particles have been investigated as a new material for the treatment of contaminated water.
Recovery of metals and other beneficial products from coal
Aug 19, 2016 Prakash S, Mohanty JK, Das B, Venugopal R (2001) Characterisation and removal of iron from fly ash of Talcher Area, Orissa, India. Miner Eng 14:123–126. Article Google Scholar Prasad B, Mondal KK (2009) Environmental impact of manganese due to its leaching from coal fly ash. J Environ Sci Eng 51(1):27–32
Arsenic removal from water using a novel amorphous
Jan 27, 2016 A novel effective adsorbent of alumina/silica oxide hydrate (ASOH) for arsenic removal was developed through simple chemical reactions using coal fly ash. The iron-modified ASOH with enhancing adsorption activity was further developed from raw fly ash based on the in situ technique. The adsorbents were characterized by X-ray diffraction
Molecules Free Full-Text Functionalization and
Jul 08, 2021 Bare Fe 3 O 4 NPs in Figure 4d exhibited adsorption bands at around 700–600 cm −1, which can be attributed to the stretching vibration of the Fe-O bond of iron oxide . The study of Al 2 O 3 spheres with FTIR failed to show immobilization of any compound and only showed the C=O and O=H peaks related to surface oxidation, element traces or
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