The influence of fly ash morphology and phase distribution on collection in an electrostatic precipitator

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dc.contributor.authorMetcalfe, Ren_AU
dc.contributor.authorConnor, Jen_AU
dc.contributor.authorDruskovich, Den_AU
dc.contributor.authorBlackford, MGen_AU
dc.contributor.authorShort, KTen_AU
dc.date.accessioned2022-04-20T01:53:53Zen_AU
dc.date.available2022-04-20T01:53:53Zen_AU
dc.date.issued2006-12-08en_AU
dc.date.statistics2021-08-31en_AU
dc.description.abstractFly Ash is the unburned portion of fuels which is carried away as solid particles in the hot gas stream of a furnace. It is of concern as a medium for the transport of heavy metal and other pollutants into the atmosphere, but has found application in cement manufacture and elsewhere. About 99% of the fly ash produced in a typical power station is removed by electrostatic precipitators or baghouse filters at the base of the emission stack. Precipitator efficiency is dependent on the charging properties of the fly ash particles and the adhesive forces between them. These forces in turn depend on the size, morphology, chemical constitution and phase distribution of the fly ash. X-ray diffraction (XRD) results indicate that about two thirds of the material from a typical Central Queensland power station is non-crystalline, mostly alumino-silicate glassy spheres; the remainder crystalline, mostly mullite, quartz, and iron oxides. Electron Microscopy shows fewer crystalline particles than expected from XRD and it is hypothesized that the crystalline material is largely embedded in the larger particles. Larger particles are usually found as aggregates held together by bridging material which may be small glassy particles, graphite sheets, or a mixture of amorphous material and small crystallites. Scanning probe microscopy gives indication of the nature and magnitude of the forces between particles, which is critical in forming the aggregates mentioned above, and in adhesion of the fly ash particles to the collector plates of the precipitator, and to one-another, and essential to the collection process.en_AU
dc.identifier.citationMetcalfe, R., Connor, J., Druskovich, D, Blackford, M., & Short, K. (2006). The influence of fly ash morphology and phase distribution on collection in an electrostatic precipitator. Paper presented at the Australian Institute of Physics 17th National Congress 2006, Brisbane Convention and Exhibition Centre, Brisbane Australia, Sunday 3 - Friday 8 December 2006. Retrieved from: https://www.aip.org.au/resources/Documents/Congress/AIPCongress-2006-Program.pdfen_AU
dc.identifier.conferenceenddate8 December 2006en_AU
dc.identifier.conferencenameAustralian Institute of Physics 17th National Congress 2006en_AU
dc.identifier.conferenceplaceBrisbane, Australiaen_AU
dc.identifier.conferencestartdate3 December 2006en_AU
dc.identifier.urihttps://www.aip.org.au/resources/Documents/Congress/AIPCongress-2006-Program.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13040en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectFly ashen_AU
dc.subjectMorphologyen_AU
dc.subjectElectrostatic precipitatorsen_AU
dc.subjectFuelsen_AU
dc.subjectGasesen_AU
dc.subjectPollutantsen_AU
dc.subjectCement industryen_AU
dc.subjectBaghousesen_AU
dc.subjectAir pollution controlen_AU
dc.subjectIndustrial wastesen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectParticlesen_AU
dc.subjectMicroscopyen_AU
dc.titleThe influence of fly ash morphology and phase distribution on collection in an electrostatic precipitatoren_AU
dc.typeConference Abstracten_AU
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