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2 221 747

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IPC

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Application

2002109806/15, 2002-04-15

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Start date

2002-04-15

(22)

Actual filing date

2002-04-15

(45)

Published

2004-01-20

(72)

Inventor

Akhmetov I.U.Anikeev V.I.Pikhtovnikov A.G.Klimenko T.N.Shepelev I.I.Chashchin O.A.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Glinozemnyj Kombinat"

NEPHELINE ORE PROCESSING METHOD Russian patent published in 2004 - IPC

Abstract RU 2221747 C2

FIELD: mining industry. SUBSTANCE: calcination method for processing of nepheline ores comprises providing nepheline/lime/soda blend and calcination thereof followed by leaching, desiliconization, and carbonization of aluminate solution to produce alumina, sodium products, and potassium sulfate. When preparing nepheline/lime/soda blend, 0.15-0.41% of aluminum fluoride production low- grade product containing anhydrite-gypsum mix is added. EFFECT: reduced blend preparation expenses due to lower consumption of lime and additional yield of potassium sulfate as commercial product. 3 tbl

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RU 2 221 747 C2

Authors

Akhmetov I.U.

Anikeev V.I.

Pikhtovnikov A.G.

Klimenko T.N.

Shepelev I.I.

Chashchin O.A.

Dates

2004-01-20—Published

2002-04-15—Filed