Process for the recovery of alumina from fly ash

Patent · Tue Aug 09 00:00:00 EDT 1983

OSTI ID:864653

Murtha, Marlyn J ^[1]

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1. 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 Univ., Ames, IA (United States)
• 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

Related Subjects

process
recovery
alumina
fly
ash
improvement
lime-sinter
recovering
pulverized
coal
disclosed
addition
10
weight
percent
carbon
sulfur
ash-calcium
carbonate
mixture
increase
sintering
temperatures
percent carbon
coal fly
pulverized coal
fly ash
weight percent
calcium carbonate
carbonate mixture
sintering temperature
mixture increase
sinter process
/423/