Performance of dry separation processes in cenospheres recovery from coal fly ash

H. Petrus, T. Hirajima, Y. Oosako, Moriyasu Nonaka, Keiko Sasaki, T. Ando

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Many researchers have recently been very interested in the recovery of valuable materials from fly ash. One of them is cenospheres, which are beneficial for light weighted material components due to their physical and chemical characteristics. Cenospheres recovery technologies are mostly based on wet separation process due to their density, which is lower than water density. Meanwhile the possibility of dry separation process has not yet been fully explored. In contrast to wet separation, a dry separation process provides substantial benefits. These benefits include: much less land consumption and reduced levels of pollution related to the leaching of toxic materials from coal fly ash. In this study, experimental work has been conducted using two types of dry separation processes: a pneumatic separator closed type and a micron separator. Comparing the two alternative techniques, the micron separator obtained Newton's efficiency higher than that of pneumatic separator closed type and showed a better degree of separation. Cenospheres recovery, particle distribution and visualisation of both underflow and overflow product using Scanning Electron Microscopy (SEM) were also performed to comprehensively depict the separation performance of both dry separation processes. It was found that micron separator's Newton's efficiency tendency is in line with the estimate, showing that dry separation process achieves a degree of separation as high as the commonly used technology which is wet separation process.

Original languageEnglish
Title of host publicationXXV International Mineral Processing Congress 2010, IMPC 2010
Pages3863-3871
Number of pages9
Volume5
Publication statusPublished - 2010
Event25th International Mineral Processing Congress 2010, IMPC 2010 - Brisbane, QLD, Australia
Duration: Sep 6 2010Sep 10 2010

Other

Other25th International Mineral Processing Congress 2010, IMPC 2010
CountryAustralia
CityBrisbane, QLD
Period9/6/109/10/10

All Science Journal Classification (ASJC) codes

  • Earth-Surface Processes
  • Geology
  • Electrical and Electronic Engineering
  • Mechanical Engineering

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  • Cite this

    Petrus, H., Hirajima, T., Oosako, Y., Nonaka, M., Sasaki, K., & Ando, T. (2010). Performance of dry separation processes in cenospheres recovery from coal fly ash. In XXV International Mineral Processing Congress 2010, IMPC 2010 (Vol. 5, pp. 3863-3871)