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RU

(11)

2 290 447

(13)

C2

(51)

IPC

C21C7/06(2006-01-01)

C21C7/76(2006-01-01)

(21) (22)

Application

2005108948/02, 2005-03-28

(24)

Start date

2005-03-28

(22)

Actual filing date

2005-03-28

(45)

Published

2006-12-27

(72)

Inventor

Sukhanov Jurij FedorovichKhrebin Valerij NikolaevichDagman Aleksej Igor'EvichLebedev Vladimir Il'Ich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Metallurgicheskij Kombinat"

STEEL MAKING METHOD Russian patent published in 2006 - IPC C21C7/06 C21C7/76 

Abstract RU 2290447 C2

FIELD: ferrous metallurgy; treatment of steel in steel-teeming ladle.

SUBSTANCE: proposed method includes tapping of melt from converter to ladle, delivery of deoxidizers, alloying and slag-forming materials in the course of tapping and blowing the melt in ladle with neutral gas. After filling of ladle, aluminum is introduced in two portions in melt in form of rods; consumption of aluminum in first portion is set by the following dependence: M1=0.1[0]/K1+1000(0.015-0.050)/K2; then, melt is blown with neutral gas at flow rate of 0.001-0.007 m3/(t·min) during 2-6 minutes, after which second portion of aluminum is introduced into melt at consumption determined from the following dependence: M2=(0.1-0.7)M1; then, melt is blown with neutral gas at flow rate of 0.0005-0.0055 m3/(t·min) during 2-6 min.

EFFECT: reduction of consumption of alumo-containing materials; reduced content of oxide inclusions in metal.

1 tbl, 1 ex

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RU 2 290 447 C2

Authors

Sukhanov Jurij Fedorovich

Khrebin Valerij Nikolaevich

Dagman Aleksej Igor'Evich

Lebedev Vladimir Il'Ich

Dates

2006-12-27—Published

2005-03-28—Filed

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