Evaluation of carbon burn-out technology applied to rice hull ash. Final report
EPRI sponsored development of a Fly Ash Carbon Burn-Out process for beneficiating high carbon ash. Initial development aimed at reducing carbon from fly ash from pulverized coal fire boilers. this report describes the application of the Carbon Burn-Out process to high carbon rice hull ash. The non-combustible fraction of rice hull ash is high in silica and has a high specific surface area. If the carbon could be economically removed from this ash without converting the silica to a crystalline form, these characteristics might make the material competitive with silica fume as a valuable concrete admixture. Tests on rice hull ash at the Carbon Burn-Out pilot plant in Tampa, Florida showed that the carbon content of such ash could be significantly reduced and that little, if any, crystalline silica is produced during combustion. Concrete tests utilizing the processed rice hull ash wet ground to 6 {mu}m average size indicated that the beneficiated ash would be a viable competitor to commercially valuable silica fume.
- Research Organization:
- Electric Power Research Inst. (EPRI), Palo Alto, CA (United States); Progress Materials, Inc., St. Petersburg, FL (United States)
- Sponsoring Organization:
- Electric Power Research Inst., Palo Alto, CA (United States)
- OSTI ID:
- 393378
- Report Number(s):
- EPRI-TR-106061; TRN: 96:006189
- Resource Relation:
- Other Information: PBD: Apr 1996
- Country of Publication:
- United States
- Language:
- English
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