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2 154 678

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IPC

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Application

99114924/02, 1999-07-07

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Start date

1999-07-07

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Actual filing date

1999-07-07

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Published

2000-08-20

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Inventor

Lisin V.S.Skorokhodov V.N.Nastich V.P.Kukartsev V.M.Mizin V.G.Zakharov D.V.Filjashin M.K.Khrebin V.N.Sukhanov Ju.F.Lebedev V.I.

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Holder

Oao Metallurgicheskij Kombinat"

METHOD OF TREATING STEEL IN LADLE Russian patent published in 2000 - IPC

Abstract RU 2154678 C1

FIELD: steelmaking. SUBSTANCE: invention relates to heating steel in steel-casting ladle based on utilizing heat of exothermic oxidation reactions. Aluminum wire is added into ladle, after which metal in ladle is blown with oxygen through immersed lance. According to invention, preliminary amount of aluminum is added into ladle before blowing with oxygen and this amount (P, kg per 1 t steel) is determined from dependence: P = K₁ M/[Al]t, where t is temperature of steel in ladle, ^oC; M mass of steel in ladle, t; [Al] concentration of aluminum in steel before treatment, wt %; K₁ empirical factor ranging between 0.007 and 0.56 kg.%.^oC./t². Addition of aluminum is continued simultaneously with blowing with oxygen, whose intake (Q, cu.m/min per 1 t steel) is determined from dependence: Q = K₂.q.Δt.M, where Q is consumption of aluminum varying between 50 and 180 kg/min; Δt required increase of temperature in ladle, ^oC; K₂ empirical factor equal to (0.05-4.0). 10^-6 cu. m/kg.t².^oC. EFFECT: increased steel heating productivity and efficiency. 1 tbl, 5 ex

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RU 2 154 678 C1

Authors

Lisin V.S.

Skorokhodov V.N.

Nastich V.P.

Kukartsev V.M.

Mizin V.G.

Zakharov D.V.

Filjashin M.K.

Khrebin V.N.

Sukhanov Ju.F.

Lebedev V.I.

Dates

2000-08-20—Published

1999-07-07—Filed