Process for the recovery of alumina from fly ash
Patent
·
OSTI ID:864653
- Ames, IA
An improvement in the lime-sinter process for recovering alumina from pulverized coal fly ash is disclosed. The addition of from 2 to 10 weight percent carbon and sulfur to the fly ash-calcium carbonate mixture increase alumina recovery at lower sintering temperatures.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA; Iowa State University, Ames, IA (US)
- DOE Contract Number:
- W-7405-ENG-82
- Assignee:
- Murtha, Marlyn J. (Ames, IA)
- Patent Number(s):
- US 4397822
- Application Number:
- 06/424,703
- OSTI ID:
- 864653
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
/423/
10
addition
alumina
ash
ash-calcium
calcium carbonate
carbon
carbonate
carbonate mixture
coal
coal fly
disclosed
fly
fly ash
improvement
increase
lime-sinter
mixture
mixture increase
percent
percent carbon
process
pulverized
pulverized coal
recovering
recovery
sinter process
sintering
sintering temperature
sulfur
temperatures
weight
weight percent
10
addition
alumina
ash
ash-calcium
calcium carbonate
carbon
carbonate
carbonate mixture
coal
coal fly
disclosed
fly
fly ash
improvement
increase
lime-sinter
mixture
mixture increase
percent
percent carbon
process
pulverized
pulverized coal
recovering
recovery
sinter process
sintering
sintering temperature
sulfur
temperatures
weight
weight percent