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2 120 484

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IPC

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Application

97116756/02, 1997-10-13

(22)

Actual filing date

1997-10-13

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Published

1998-10-20

(72)

Inventor

Makarova T.A.Makarov D.F.Naftal' M.N.Markov Ju.F.Burkova I.I.Saverskaja T.P.Shestakova R.P.Grigor'Eva L.G.Lindt V.A.Oruzhejnikov A.I.Nikolaev Ju.M.Filippov Ju.A.Polosukhin V.A.Sukhobaevskij Ju.Ja.Shirshov Ju.A.Abramov N.P.Mal'Tsev N.A.Rozenberg Zh.I.Vashkeev V.M.Kozlov S.G.Gustov S.G.

(73)

Holder

Aktsionernoe Obshchestvo Gorno-Metallurgicheskij Kombinat"

METHOD OF PREPARING CALCIUM SULFIDIZER TO PRECIPITATE HEAVY NONFERROUS METALS FROM ACIDIC SULFATE SOLUTIONS AND LIQUID PHASE OF FERRIFEROUS HYDRATE SLURRIES Russian patent published in 1998 - IPC

Abstract RU 2120484 C1

FIELD: hydrometallurgy. SUBSTANCE: aqueous slurry of calcium carbonate is treated with sulfur dioxide and sulfur-containing reducing agent, in particular, hydrogen sulfide, at elevated temperature (50-80 C) and constant stirring for 30 to 240 min. When molar ratio of sulfur dioxide to hydrogen sulfide in mixture exceeds or is equal to 1:2, pH value of slurry is maintained within a range of 3.0-6.5, and when this ratio is below 1:2, pH value ranges from 8.0 to 9.5. The reagents may be used contained in reducing metallurgic gases. EFFECT: reduced expenses on reagents and increased completeness of processing polymetallic intermediate products. 2 cl, 2 tbl, 2 ex

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RU 2 120 484 C1

Authors

Makarova T.A.

Makarov D.F.

Naftal' M.N.

Markov Ju.F.

Burkova I.I.

Saverskaja T.P.

Shestakova R.P.

Grigor'Eva L.G.

Lindt V.A.

Oruzhejnikov A.I.

Nikolaev Ju.M.

Filippov Ju.A.

Polosukhin V.A.

Sukhobaevskij Ju.Ja.

Shirshov Ju.A.

Abramov N.P.

Mal'Tsev N.A.

Rozenberg Zh.I.

Vashkeev V.M.

Kozlov S.G.

Gustov S.G.

Dates

1998-10-20—Published

1997-10-13—Filed

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