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2 459 874

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C1

(51)

IPC

C21C5/28(2006-01-01)

(21) (22)

Application

2011102068/02, 2011-01-20

(24)

Start date

2011-01-20

(22)

Actual filing date

2011-01-20

(45)

Published

2012-08-27

(72)

Inventor

Sukhanov Jurij FedorovichDolgikh Jurij Nikolaevich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Metallurgicheskij Kombinat"

METHOD OF CASTING LOW-PHOSPHORUS STEEL IN CONVERTER Russian patent published in 2012 - IPC C21C5/28 

Abstract RU 2459874 C1

FIELD: metallurgy.

SUBSTANCE: proposed method comprises feeding liquid iron solid metal mix into converter, melt oxygen scavenging from above and neutral-gas jet degassing via bottom blow device, feeding lime, cooling agent and heat carrier, and defining melt chemical composition after melt degassing. Prior to feeding materials into converter, heat carrier flow rate is set subject to physicochemical laws of melt dephosphorisation, liquid iron temperature and flow rate, and weight fraction of silicon in liquid iron. Lime flow rate is defined subject to physiochemical laws of lime dissolution, weight fraction of silicon in liquid iron, liquid iron and heat carrier flow rates. Cooling agent flow rate is defined subject to heat carrier and liquid iron flow rate. Melt oxygen scavenging from above and neutral-gas jet degassing via bottom blow device are terminated when weight fraction of carbon in melt does not exceed 12 [P]p. Ferrosilicon or its mix with aluminium-bearing material is used as heat carrier.

EFFECT: low weight fraction of phosphorus in finished steel.

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RU 2 459 874 C1

Authors

Sukhanov Jurij Fedorovich

Dolgikh Jurij Nikolaevich

Dates

2012-08-27—Published

2011-01-20—Filed

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