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2 153 013

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C1

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IPC

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Application

99121381/02, 1999-10-11

(24)

Start date

1999-10-11

(22)

Actual filing date

1999-10-11

(45)

Published

2000-07-20

(72)

Inventor

Kazanbaev L.A.Kozlov P.A.Kolesnikov A.V.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa Ehlektrolitnyj Tsinkovyj Zavod"

METHOD OF PROCESSING ZINC CAKES Russian patent published in 2000 - IPC

Abstract RU 2153013 C1

FIELD: nonferrous metallurgy. SUBSTANCE: method is used in processing of silver-containing zinc cakes with recovery of silver into conditioned product. Method includes stages of flotation, roasting of flotation concentrate, sulfuric acid leaching, washing of leaching solid residue from sulfates in solutions of caustic soda and soda ash with their total concentration of 50-150 g/l at temperature range of 80-90 C and subsequent melting of silver-containing product to obtain Dore alloy. EFFECT: reduction of sulfur in product directed for melting, and increased recovery of silver into melt at melting stage. 1 tbl

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RU 2 153 013 C1

Authors

Kazanbaev L.A.

Kozlov P.A.

Kolesnikov A.V.

Dates

2000-07-20—Published

1999-10-11—Filed

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