Dissolution of lime into coal ash slags
Conference
·
OSTI ID:370407
- Newcastle Univ., Callaghan (Australia)
One of the alternate processes presently being investigated to produce electrical power from coal is Integrated Gasification Combined Cycle (IGCC). The ash that remains when the coal is gasified in this process is removed by granulating the molten ash at 1400-1500{degrees}C. To reduce the melting temperature of the coal ash, a flux, usually limestone, is added with the coal to the gasifier. This paper reports the investigation of the rate of lime dissolution into synthetic coal ashes, consisting of SiO{sub 2}, Al{sub 2}O{sub 3} and CaO (SiO{sub 2}/Al{sub 2}O{sub 3} = 2 to 3.35). Preliminary measurements indicated that the dissolution of fix particles (50-200 {mu}m) is mass transfer controlled. A high temperature viscometer was used to rotate a cylinder of lime in the molten slag for a given period.
- OSTI ID:
- 370407
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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