METHOD FOR PRODUCING CLEAN STEEL BY MEANS OF ELECTRIC ARC FURNACE DUAL SMELTING OF FULL SCRAP STEEL

WIPO Patent Application WO/2018/227836

A1

Disclosed is a method for producing clean steel by means of the electric arc furnace dual smelting of full scrap steel, wherein electric arc furnaces of two stations are connected in series, the electric arc furnace of the first station serves as a dephosphorization electric arc furnace (1), and the electric arc furnace of the second station serves as a decarburization electric arc furnace (8). In the dephosphorization electric arc furnace (1), scrap steel (2) can be melted and then subjected to dephosphorization and carburization. The molten steel is poured into the decarburization electric arc furnace (8) by means of a steel ladle (7), and the decarburization electric arc furnace (8) internally conducts continuous slagging and deep dephosphorization. During a decarburization period, oxygen is sprayed into the molten steel by means of the amount of carbon added by the dephosporization electric arc furnace (1), a decarburization boiling operation is conducted, and [N], [H] and impurities in the molten steel can be deeply removed through generated CO bubbles, such that the molten steel has a high degree of cleanliness.

ZHU RONG (CN)
WEI GUANGSHENG (CN)
TANG TIANPING (CN)
DONG KAI (CN)
ZHAO JINGXIN (CN)
WU XUETAO (CN)
CHEN FENGWU (CN)

PCT/CN2017/107291

December 20, 2018

October 23, 2017

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UNIV BEIJING SCIENCE & TECHNOLOGY (CN)
TANGSHAN SHOUTANG BAOSHENG FUNCTIONAL MAT CO LTD (CN)

C21C7/064; C21C7/068

CN102268509A	2011-12-07
CN1373229A	2002-10-09
KR20170019530A	2017-02-22
GB1141560A	1969-01-29
JPS60174812A	1985-09-09

BEIJING GUANGYOU PATENT FIRM LTD. et al. (CN)

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