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2 320 736

(13)

(51)

IPC

C22B23/00(2006-01-01)

C22B3/06(2006-01-01)

(21) (22)

Application

2006115018/02, 2006-05-02

(24)

Start date

2006-05-02

(22)

Actual filing date

2006-05-02

(45)

Published

2008-03-27

(72)

Inventor

Ivanova Natal'Ja FedorovnaShneerson Jakov MikhajlovichSaltykov Pavel MikhajlovichZhmarin Evgenij Evgen'EvichKhomjakova Irina NikolaevnaTrubina Ol'Ga Akimovna

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Gipronikel'" Gipronikel'")

METHOD OF PURIFYING HYDROLYTIC FERRIFEROUS CAKES BY REMOVAL OF NICKEL Russian patent published in 2008 - IPC C22B23/00 C22B3/06

Abstract RU 2320736 C2

FIELD: nonferrous metallurgy.

SUBSTANCE: invention relates to processing nickel-containing intermediate products, namely ferriferous cakes obtained in hydrometallurgical nickel production process. Method comprises repulping of cakes with acid solution containing alkaline metal salts at elevated temperature and maintaining pH of pulp between 1.2 and 1.6. Repulping is effected in reactor provided with mechanical stirring means at specific stirring power in first stage 500-1000 W/m³ and in second stage 5-100 W/m³.

EFFECT: enhanced removal of nickel and improved filterability of products.

8 cl, 5 tbl

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RU 2 320 736 C2

Authors

Ivanova Natal'Ja Fedorovna

Shneerson Jakov Mikhajlovich

Saltykov Pavel Mikhajlovich

Zhmarin Evgenij Evgen'Evich

Khomjakova Irina Nikolaevna

Trubina Ol'Ga Akimovna

Dates

2008-03-27—Published

2006-05-02—Filed