The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 18, 2017
Filed:
Mar. 13, 2012
Fuping Tang, Anshan, CN;
Zhen LI, Anshan, CN;
Xiaofeng Wang, Anshan, CN;
Peng Fei, Anshan, CN;
Jinsong Meng, Anshan, CN;
Yue Zhang, Anshan, CN;
Yong MA, Anshan, CN;
Wenzhong Wang, Anshan, CN;
Zhiwen Zhang, Anshan, CN;
Xiaoshan Wang, Anshan, CN;
Meng Guo, Anshan, CN;
Zhigang Zhao, Anshan, CN;
Yang Lin, Anshan, CN;
Guoqiang Xin, Anshan, CN;
Weizhi Yao, Anshan, CN;
Fuping Tang, Anshan, CN;
Zhen Li, Anshan, CN;
Xiaofeng Wang, Anshan, CN;
Peng Fei, Anshan, CN;
Jinsong Meng, Anshan, CN;
Yue Zhang, Anshan, CN;
Yong Ma, Anshan, CN;
Wenzhong Wang, Anshan, CN;
Zhiwen Zhang, Anshan, CN;
Xiaoshan Wang, Anshan, CN;
Meng Guo, Anshan, CN;
Zhigang Zhao, Anshan, CN;
Yang Lin, Anshan, CN;
Guoqiang Xin, Anshan, CN;
Weizhi Yao, Anshan, CN;
Other;
Abstract
A method for preparing low-cost clean steel includes steps of: preliminarily desulfurizing iron melt: preliminarily desulfurizing in an iron melt channel during blast furnace tapping and during iron folding in an iron folding room, adding a desulfurizing ball into the iron melt during the blast furnace tapping or the iron folding; dephosphorizing and controlling sulfur: dephosphorizing and controlling sulfur during converter steelmaking, in such a manner that P≦0.014% and S≦0.004% during tapping; rapidly dephosphorizing by slag-forming: rapidly dephosphorizing by slag-forming during converter tapping, at a converter end point, controlling a C content at 0.02˜0.10%, adding a dephosphorizing ball through an alloy chute during the converter tapping, blowing argon and stirring at the same time; purifying steel melt during RH refining: adding a purifying ball at a late stage of the RH refining when a vacuum degree is at 66.7˜500 Pa; and continuously casting with whole-process protection.