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2 241 672

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IPC

(21) (22)

Application

2002127486/15, 2002-10-14

(24)

Start date

2002-10-14

(22)

Actual filing date

2002-10-14

(45)

Published

2004-12-10

(72)

Inventor

Dashkevich R.Ja.Kirko V.I.Anikeev V.I.Domnina O.N.

(73)

Holder

Nauchno-Issledovatel'Skij Fiziko-Tekhnicheskij Institut Krasnojarskogo Gosudarstvennogo Universiteta Ministerstva Obrazovanija Rossijskoj Federatsii

METHOD OF PRODUCING LOW-ALKALINITY FINE α-ALUMINA Russian patent published in 2004 - IPC

Abstract RU 2241672 C2

FIELD: inorganic compounds technology.

SUBSTANCE: low-alkalinity fine α-alumina is obtained from recycled calcination furnace electrofilter dust by way of leaching, filtration, and calcination, in particular in presence of mineralizers. Recycled dust is leached at 80^оС and heating is accomplished in two steps: from 20 to 800^оС at the rate 150^оС/h and from 800 to 1200^оС at the rate 250^оС/h.

EFFECT: simplified process, reduced power consumption, and enabled production of alumina with uniform granulometric composition.

2 cl, 2 tbl

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RU 2 241 672 C2

Authors

Dashkevich R.Ja.

Kirko V.I.

Anikeev V.I.

Domnina O.N.

Dates

2004-12-10—Published

2002-10-14—Filed