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1 748 450

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A1

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IPC

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Application

3159071/02, 1986-12-25

(22)

Actual filing date

1986-12-25

(45)

Published

1994-01-15

(72)

Inventor

Romanchuk A.I.Ivanovskaja V.P.Koroleva E.I.Shvedova N.V.

METHOD OF IRON-MANGANESE CONCRETIONS REPROCESSING Russian patent published in 1994 - IPC

Abstract SU 1748450 A1

FIELD: non-ferrous metals. SUBSTANCE: non-ferrous metals are leached with sulfur dioxide in the presence of O2. In the process of leaching pH value is maintained at the range 1,5- 2,7 by addition of sulfuric acid to the pulp. Leaching is stopped, when the ratio of sulfur dioxide fed to the pulp to manganese level in concretion is 1,2-2,0. Iron is precipitated from solution by concretion addition at concentration providing ratio of manganese in concretion to ferrous in solution 0,5-1,0. EFFECT: improved method of iron-manganese concretion reprocessing. 2 cl, 2 tbl

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SU 1 748 450 A1

Authors

Romanchuk A.I.

Ivanovskaja V.P.

Koroleva E.I.

Shvedova N.V.

Dates

1994-01-15—Published

1986-12-25—Filed

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