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2 089 527

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C1

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IPC

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Application

94025009/03, 1994-07-13

(22)

Actual filing date

1994-07-13

(45)

Published

1997-09-10

(72)

Inventor

Akhatov Kairzhan Khasenovich[Kz]Bashaeva Ljudmila Aleksandrovna[Kz]Levintov Boris L'Vovich[Kz]

(73)

Holder

Tovarishchestvo S Ogranichennoj Otvetstvennost'Ju

METHOD OF PREPARING WOOLASTONITE Russian patent published in 1997 - IPC

Abstract RU 2089527 C1

FIELD: technology of preparation of synthetic wollastonite. SUBSTANCE: claimed method of preparing electrothermal phosphorus slag based wollastonite comprises adding additives to slag in reducing atmosphere, sharply cooling the melt and thermally treating it. The additives include sodium and barium sulfates, vanadium oxide and calcium fluoride, and the are added to attain molar ratio of in the melt. Thermal treatment is carried out in two stages at 720-740 C for 30 minutes and at 950-1010 for 2.5 hours. Vanadium quartzite containing CaF2,BaSO4,V2O5 may be used as the final product. EFFECT: lower heat treatment temperature. 3 cl

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RU 2 089 527 C1

Authors

Akhatov Kairzhan Khasenovich[Kz]

Bashaeva Ljudmila Aleksandrovna[Kz]

Levintov Boris L'Vovich[Kz]

Dates

1997-09-10—Published

1994-07-13—Filed

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