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2 061 075

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Application

93018571/02, 1993-04-06

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Actual filing date

1993-04-06

(45)

Published

1996-05-27

(72)

Inventor

Bajramov B.I.Zajko V.P.D'Jakonova L.A.Karnaukhov V.N.Voronov Ju.I.Iskhakov F.M.

(73)

Holder

Aktsionernoe Obshchestvo Otkrytogo Tipa Ehlektrometallurgicheskij Kombinat"

PROCESS OF PREPARATION OF OXIDE MOLYBDENUM CONCENTRATE Russian patent published in 1996 - IPC

Abstract RU 2061075 C1

FIELD: ferroalloy metallurgy. SUBSTANCE: process refers to preparation of oxide molybdenum concentrate for smelting of ferroalloy based on molybdenum. It includes calcination of sulphide molybdenum stock in fluidized bed furnace followed by calcination of dust trapped by gas cleaning of fluidized bed furnace in multihearth furnace. Rate of air flow at stage of desulphurization during calcination in multihearth furnace amounts to 125-150 m/h per ton of dust up to achievement of mass proportion of sulphate sulphur to sulphide sulphur equal to 1:(2.0-2.2). At stage of desulphurization rate of air flow is reduced to 75- 90 m/h per ton of dust. EFFECT: reduced content of sulphur in calcinated concentrate, up to 0.05%. 1 tbl

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RU 2 061 075 C1

Authors

Bajramov B.I.

Zajko V.P.

D'Jakonova L.A.

Karnaukhov V.N.

Voronov Ju.I.

Iskhakov F.M.

Dates

1996-05-27—Published

1993-04-06—Filed

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