Method of making steel by deeply dephosphorization in hot metal tank and decarburization using semi-steel with nearly zero phosphorus load in converter

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United States of America Patent

PATENT NO 11674192
APP PUB NO 20230121123A1
SERIAL NO

17953832

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Abstract

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A method of making steel by deeply dephosphorization in a hot metal tank and decarburization using semi-steel with nearly zero phosphorus load in a converter includes the following steps: putting an efficient dephosphorization agent into the hot metal tank in advance, and conducting dephosphorization during blast furnace tapping and transportation of blast furnace hot metal by the hot metal tank to obtain semi-steel with [P] less than 0.04 wt. % and [C] greater than or equal to 3.5 wt. %; and removing dephosphorization slag, and pouring the semi-steel into the converter for decarburization to obtain molten steel. The efficient dephosphorization agent includes iron oxide scale, lime, and composite calcium ferrite. According to the method, a phosphorus content of the blast furnace hot metal is reduced to be less than or equal to 0.04 wt. % through the efficient dephosphorization agent.

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Patent OwnerAddress
UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING100083 NO 30 HAIDIAN DISTRICT BEIJING XUEYUAN ROAD BEIJING CITY BEIJING CITY 100083

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Zhan, Zhonghua Beijing, CN 1 0
Zhang, Weifeng Beijing, CN 67 95
Zhang, Yanling Beijing, CN 13 109
Zhao, Zheng Beijing, CN 193 1145

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