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2 154 544

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IPC

(21) (22)

Application

99101228/02, 1999-01-19

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Start date

1999-01-19

(22)

Actual filing date

1999-01-19

(45)

Published

2000-08-20

(72)

Inventor

Nastich V.P.Kazadzhan L.B.Barjatinskij V.P.Savchenko V.I.Ponomarev B.I.Taran V.G.Shchelkanov V.S.Kovalev A.N.Lebedev V.I.

(73)

Holder

Aktsionernoe Obshchestvo Metallurgicheskij Kombinat"

METHOD OF CONTINUOUSLY CASTING ELECTRIC STEEL Russian patent published in 2000 - IPC

Abstract RU 2154544 C1

FIELD: ferrous metallurgy. SUBSTANCE: when tapping electric steel from casting ladle into tundish ladle through refractory tube, argon-nitrogen gas mixture is injected under metal level into refractory tube. Volume percentage of nitrogen (M) in gas mixture is found from relationship: M = KQ[([Al] +[N]/[(Al- 0.006)-(N+0.001)], where Q is weight intake of steel through refractory tube, t/min; K empiric coefficient characterizing physico-chemical principles of nitrogen absorption by steel equal to 5.65-8.3; [Al] required aluminum content in ingots, wt %; [N] required nitrogen content in ingots, wt %; Al aluminum content in steel in casting ladle, wt %; N nitrogen content in steel in casting ladle, wt %; 0.001 and 0.006 are empiric coefficients. EFFECT: increased accuracy in ensuring specified concentration of nitrogen in cast metal and therefore improved quality of continuously cast ingots. 2 cl, 1 tbl

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RU 2 154 544 C1

Authors

Nastich V.P.

Kazadzhan L.B.

Barjatinskij V.P.

Savchenko V.I.

Ponomarev B.I.

Taran V.G.

Shchelkanov V.S.

Kovalev A.N.

Lebedev V.I.

Dates

2000-08-20—Published

1999-01-19—Filed