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2 100 458

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Application

96109154/02, 1996-05-13

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Actual filing date

1996-05-13

(45)

Published

1997-12-27

(72)

Inventor

Ermakov A.V.Sivkov M.N.Timofeev N.I.Kozhurkov V.N.Nikitin V.P.Kuz'Menko G.F.Zhizhin S.M.Dmitriev V.A.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa Zavod Po Obrabotke Tsvetnykh Metallov"

METHOD OF PROCESSING ZINC PRECIPITATES CONTAINING PRECIOUS METALS Russian patent published in 1997 - IPC

Abstract RU 2100458 C1

FIELD: nonferrous metallurgy. SUBSTANCE: invention relates to processing precipitates produced when carburizing cyanide solutions containing zinc and lead (zinc precipitates). Precipitate is burned in oxidative atmosphere at 750-850 C for 30-75 h, ashes are mixed with fluxing additives containing cryolite and/or borax in quantity providing ratio of initial material to fluxing additive 1:(1.0-0.5), and resulting mixture is smelted at 1100-1250 C, aging lasting at least 1 h. Smelting is carried out under stirring in stirrer-equipped crucible, surface of the both being coated to provide elevated wettability with regard to precious metal smelt. EFFECT: increased precious metal recovery into ingot appropriate for manufacturing jewelry articles. 2 cl, 2 tbl

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RU 2 100 458 C1

Authors

Ermakov A.V.

Sivkov M.N.

Timofeev N.I.

Kozhurkov V.N.

Nikitin V.P.

Kuz'Menko G.F.

Zhizhin S.M.

Dmitriev V.A.

Dates

1997-12-27—Published

1996-05-13—Filed

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