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Application

97118967/02, 1997-11-11

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Actual filing date

1997-11-11

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Published

1999-01-10

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Inventor

Komratov Ju.S.Kuzovkov A.Ja.Arshanskij M.I.Chernushevich A.V.Il'In V.I.Mineev V.N.Kogorodskij V.G.Jugov P.I.Zin'Ko B.F.Lebedev V.I.

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Metallurgicheskij Kombinat"

METHOD OF STEEL MELTING IN CONVERTER Russian patent published in 1999 - IPC

Abstract RU 2124567 C1

FIELD: metallurgy, more specifically, processes of steel melting in converters from vanadium iron. SUBSTANCE: method includes supply to converter of metal scrap; pouring vanadium iron to converter; supply of slag-forming materials including lime; top blowing of oxygen through immersing multinozzle lance; measurement of melt temperature; tapping of melt from converter to casting ladle with slag left in converter. Metal scrap is supplied to converter in the amount of 0.2-0.3 of amount of poured pig iron. Oxygen blowing is carried out during the first period of blowing in the amount equalling 0.25-0.35 of the total blowing time and with position of lance at a height H1 from the level of quiet bath and equalling 30-90 calibers of lance nozzles. Then, slag is discharged and temperature of melt is measured. Should temperature deviate from the preset value, melt is subjected to final blowing or cooling agent is supplied to converter. Then supplied to converter are lime and fluorspar with consumption of 25-40 kg/t and 1.0-1.5 kg/t of melt, respectively. Further on, blowing is carried out with lance positioned at height H2, equalling (0.4-0.6)H1.. Two-three minutes before ending of blowing, lance is lowered to height H3 equalling (0.3-0.5)H1. Weight of cooling agent supplied to converter is determined by relationship given in the description of the invention. EFFECT: higher output of melting process under conditions of high content of vanadium pentoxide in slag. 2 cl, 1 tbl

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RU 2 124 567 C1

Authors

Komratov Ju.S.

Kuzovkov A.Ja.

Arshanskij M.I.

Chernushevich A.V.

Il'In V.I.

Mineev V.N.

Kogorodskij V.G.

Jugov P.I.

Zin'Ko B.F.

Lebedev V.I.

Dates

1999-01-10—Published

1997-11-11—Filed

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