Process for extracting alumina from alumina-containing ores

Details Process for extracting alumina from alumina-containing ores Process for extracting alumina from alumina-containing ores

1977-08-01

1978-12-05

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iiia metal or beryllium

423121, C01F 706

Patent

active

041286189

ABSTRACT:
In a process for extracting alumina from alumina-containing ores on a two-stream system by individually preheating a slurry of alumina-containing ores and an aqueous alkali solution each in preheaters of indirectly heating, mixing the preheated slurry with the preheated aqueous alkali solution, and extracting alumina from the ores in a digester of either the heating type involving the direct injection of live steam or the heat-insulated type, the alumina is extracted from the ores by preparing the slurry of alumina-containing ores with water or a diluted aqueous alkali solution, such as from the drain obtained by recovering steam from an evaporator for cooling the slurry resulting from extraction, and utilizing the recovered steam in preheating the slurry of the alumina-containing ores or decomposition solution or both, preheating the slurry of alumina-containing ores, and mixing the preheated slurry with an aqueous alkali solution preheated as another stream as the decomposition solution. Scale formation can be prevented completely or substantially on an inside surface of the preheater for the slurry of alumina-containing ores.

REFERENCES:
patent: 3357792 (1967-12-01), Gebefugi
patent: 3413087 (1968-11-01), Roberts
patent: 3579295 (1971-05-01), Tamisi et al.
patent: 3997650 (1976-12-01), Yamada et al.

Affiliated with

Also associated with

Rating

Process for extracting alumina from alumina-containing ores does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for extracting alumina from alumina-containing ores, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for extracting alumina from alumina-containing ores will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-287040