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(19)

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2 707 223

(13)

(51)

IPC

C01F7/06(2006-01-01)

C01F7/14(2006-01-01)

C22B3/12(2006-01-01)

(21) (22)

Application

2019114678, 2019-05-15

(24)

Start date

2019-05-15

(22)

Actual filing date

2019-05-15

(45)

Published

2019-11-25

(72)

Inventor

Bibanaeva Svetlana AleksadrovnaSabirzyanov Nail Adelevich

(73)

Holder

Federalnoe Gosudarstvennoe Byudzhetnoe Uchrezhdenie Nauki Institut Khimii Tverdogo Tela Uralskogo Otdeleniya Rossijskoj Akademii Nauk

BAUXITE PROCESSING METHOD Russian patent published in 2019 - IPC C01F7/06 C01F7/14 C22B3/12

Abstract RU 2707223 C1

FIELD: metallurgy.

SUBSTANCE: invention can be used in non-ferrous metallurgy for bauxite processing by hydrochemical method. Bauxite is added with circulating solution and calcined solution at 1,200–1,300 °C lime in amount of 12–14 % of bauxite weight. Subsequent autoclave leaching is carried out at liquid : solid ratio of 3.0–3.5:1, pressure of 30–32 atm. and temperature of 230–235 °C.

EFFECT: proposed method provides extraction of aluminum oxide in solution equal to 94 %, from hard-to-open bauxites of diasporic and diasporic-bemite type in Bayer process; in addition, the method enables to obtain aluminate solutions with low content of silicon and iron.

1 cl, 2 ex

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RU 2 707 223 C1

Authors

Bibanaeva Svetlana Aleksadrovna

Sabirzyanov Nail Adelevich

Dates

2019-11-25—Published

2019-05-15—Filed