Method of processing and treatment of alunite ores

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United States of America Patent

PATENT NO 11753697
APP PUB NO 20210071281A1
SERIAL NO

16965940

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Abstract

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The alunite ore processing method consists of crushing, grinding and flotation of raw alunite ore. The enriched alunite ore is roasted at 520 to 620° C., the roasting time is 1 to 3 hours. The roasted alunite is leached with 5 to 20% sodium carbonate solution, which is in 100 to 110% of the stoichiometric amount required to bond the SO3 aluminum sulfate in the alunite with leaching conditions of 70-100° C. for 0.5-2.0 hours. The obtained slurry contains all of the potassium sulfate from the alunite and all of the sodium sulfate obtained from sodium carbonate. In the insoluble residue remains all aluminium oxide and residual rock. The sulfate solution is separated from the insoluble residue and is converted with potassium chloride to potassium sulphate (fertilizer) and kitchen salt. The insoluble residue is treated by the Bayer method without the use of an autoclave and results in aluminium oxide (alumina) and quartz sand.

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Patent Owner(s)

Patent OwnerAddress
TAGIJEV ELSAD250 65 LÍBEZNICE

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Agajeva, Lale Libeznice, CZ 1 0
Taghiyev, Eldar Libeznice, CZ 1 0
Tagijev, Elsad Libeznice, CZ 1 0

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