Patent number: 11718885
Abstract: Disclosed is a slag discharging method in a process of producing ultra-low phosphorus steel, which relates to the technical field of iron and steel smelting, and in which molten steel is mixed with lime first to produce basic slag; then converting is performed with oxygen to increase the oxidizability of the basic slag; and a carbon-containing reducing agent is finally added, so that in the process that the carbon is oxidized to release a large amount of carbon monoxide gas, phosphates are captured, and the basic slag is rapidly foamed and overflows from the opening of the steel ladle, so that conditions are no longer available for rephosphorization. Also disclosed is a method for producing ultra-low phosphorus steel, which includes the above-described slag discharging method in a process of producing ultra-low phosphorus steel, and refining and ingotting after slag discharge.
Type:
Grant
Filed:
May 23, 2019
Date of Patent:
August 8, 2023
Assignee:
NANYANG HANYE SPECIAL STEEL CO., LTD
Inventors:
Shucheng Zhu, Hu Zhao, Shaopu Xu, Zhongbo Li, Hongyang Li, Yang Yang, Zhenglei Tang, Tao Zhang, Qingbo Liu, Zhanjie Zhang, Jiheng Yuan, Sa Yu, Wenju Kang, Xi Chen, Shuai Zhang, Bo Li, Zhiquan Du, Di Zhao, Liang Li, Peng Jiang, Yansheng Xue, Keyi Fu, Yingjie Wang, Yongqi Yuan, Zhenzhen Dong, Baiming Pang, Haiming Zheng, Liang Chen, Weibo Quan, Xianxing Zhu, Gaojian Yuan, Chun Yang, Yong Wang, Yibo Bai, Gazi Li, Yuliang Lv, Xibin Wang, Yi Ren