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公开(公告)号：US10808290B2
公开(公告)日：2020-10-20
申请号：US16052629
申请日：2018-08-02
Applicant: University of Science and Technology Beijing
Inventor： Rong Zhu , Guangsheng Wei , Kai Dong , Jingxin Zhao , Xuetao Wu , Tianping Tang , Xueliang Wang , Wenhe Wu , Shaoyan Hu , Yun Wang
Abstract: A clean and rapid smelting method in an electric arc furnace with full scrap steel, is suitable for smelting process of 30-300 t electric arc furnace with full scrap steel. In the smelting process of the electric arc furnace with full scrap steel, different kinds of mediums are injected by an injection lance which is installed inside refractory material of sidewall at the bottom of the electric arc furnace in different stages of smelting. Carburization is utilized in molten pool to accelerate melting down and improve carbon content of the molten pool at the stage of recarburizing and fluxing. A reaction in the molten pool is intensified at the stage of high efficiency dephosphorization and deep denitrogenation, to enhance efficient dephosphorization and deep denitrification of the reaction in the molten pool, thereby accelerating the smelting speed of the electric arc furnace with full scrap steel, improving effect of dephosphorization and denitrification.
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公开(公告)号：US11174524B1
公开(公告)日：2021-11-16
申请号：US17124506
申请日：2020-12-17
Applicant: University of Science and Technology Beijing
Inventor： Rong Zhu , Bohan Tian , Kai Dong , Guangsheng Wei , Rongfang Su
Abstract: A production apparatus and method for electric arc furnace steelmaking with a fully continuous ultra-short process are provided. A continuous adding, melting, smelting and continuous casting of a metal material are integrated, and a metallurgy process is completed in a flowing of a molten steel, to realize a continuous production of ingot blanks. The production apparatus includes four operation sites of an electric arc furnace for melting and primary refining, a sealed tapping chute for molten steel flowing, a refinement storage bed for molten-steel desulfurization and alloying and a conticaster for continuous casting A material flow, an energy flow and a time stream in the four operation sites are in a dynamic equilibrium. The production apparatus and method realize a molten-steel casting is started within 120 minutes after the metal material is started to be continuously added, and an uninterrupted continuous production is maintained for above 80 hours.
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Patent Agency Ranking
公开(公告)号：US12234521B2
公开(公告)日：2025-02-25
申请号：US18670631
申请日：2024-05-21
Applicant: Xuanhua Iron and Steel Group Co., Ltd. , University of Science and Technology Beijing , HBZX HIGH TECH CO., LTD.
Inventor： Hongbin Wang , Guangsheng Wei , Rong Zhu , Minghai Zhang , Jinlong Wang , Jianping Jia , Yongqiang Yang , Jianzhong Wang , Yunxiang Zhao , Xin Li , Ceng Li , Huan Chang
Abstract: The application provides a method for controlling nitrogen in steelmaking by spraying hydrogen containing plasma, including: using a mixture of hydrogen rich gas and argon gas to generate hydrogen plasma for denitrification of molten steel during at least one of arc furnace smelting, ladle refining, VOD refining, and RH refining. The method for controlling nitrogen in steelmaking by spraying hydrogen containing plasma provided in the application can effectively remove nitrogen from the molten steel by spraying a mixture of argon gas and hydrogen rich gas into the molten steel through a hollow electrode and plasma torch, reducing electrode consumption and electricity consumption per ton steel, and also reducing arc radiation heat loss, improving heating rate, thereby shortening smelting time and reducing production costs.
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公开(公告)号：US11788160B2
公开(公告)日：2023-10-17
申请号：US17049449
申请日：2020-01-21
Applicant: University of Science and Technology Beijing
Inventor： Chao Feng , Rong Zhu , Guangsheng Wei , Baochen Han , Kai Dong , Xueliang Wang , Wenhe Wu , Shaoyan Hu , Weifeng Li , Juanjuan Jiang , Jianfeng Dong
CPC classification number: C21C5/32 , C21C5/4673
Abstract: The present disclosure provides a converter CO2—O2 mixed injection smelting method and a fire point area temperature dynamic control method. The method realizes online monitoring through an infrared temperature sensor installed inside an oxygen lance, dynamically adjusts the mixing ratio of CO2 and O2 and the height of the oxygen lance position according to the fire point area temperature changes and process requirements in different smelting stages, so that the secondary smelting system interlockingly and dynamically controls the fire point area temperature and the molten pool heating rate.
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公开(公告)号：US12123063B2
公开(公告)日：2024-10-22
申请号：US18458173
申请日：2023-08-30
Applicant: University of Science and Technology Beijing , Beijing Kemi Rongcheng Energy Technology Co., Ltd.
Inventor： Kai Dong , Xin Ren , Rong Zhu , Guangsheng Wei , Chao Feng , Rongfang Su , Shaoyan Hu , Yun Zhou , Chunyang Wang , Zhitao Xue , Linghui Meng
CPC classification number: C21C5/30 , C21C5/4606 , C21C5/466 , C21C7/0645 , C21C2005/4666
Abstract: A converter bottom blowing system comprises a first gas source connected in parallel with a lime powder silo, a lime powder blowing tank and a first injector, where a first cut-off valve is arranged between the lime powder blowing tank and the first injector; a second gas source connected in parallel with the biochar powder silo, the biochar powder blowing tank and the second injector, where a second cut-off valve is arranged between the biochar powder blowing tank and the second injector; a converter, where a plurality of bottom blowing lances are arrayed at a bottom of a converter, the bottom blowing lances are connected with the first injector and the second injector through a three-way valve, a third cut-off valve is arranged between the first injector and the three-way valve, and a fourth cut-off valve is arranged between the second injector and the three-way valve.
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公开(公告)号：US10988818B2
公开(公告)日：2021-04-27
申请号：US16926483
申请日：2020-07-10
Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
Inventor： Rong Zhu , Shaoyan Hu , Kai Dong , Guangsheng Wei , Haoran Ma , Weifeng Li , Yun Zhou , Zhihui Li , Wenhe Wu , Baochen Han , Chao Feng , Rongfang Su
Abstract: An efficient long-service-life blowing method include the steps of introducing vanadium extraction converter flue gas and decarburization converter flue gas into an oxygen combustor; obtaining first-purity CO2—N2 mixed gas through the vanadium extraction converter flue gas; obtaining second-purity CO2—N2 mixed gas through the decarburization converter flue gas; obtaining O2—CO2—N2 mixed gas through the decarburization converter flue gas; obtaining first-purity CO2 gas through the second-purity CO2—N2 mixed gas; and using the first-purity CO2—N2 mixed gas for bottom blowing of the vanadium extraction converter, using the second-purity CO2—N2 mixed gas as a carrier gas for blowing iron ore powder into the vanadium extraction converter, and using the O2—CO2—N2 mixed gas and the first-purity CO2 gas as a carrier gas for bottom blowing of the decarburization converter and bottom injecting of lime powder into the decarburization converter.
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7.发明授权公开(公告)号：US10767239B2
公开(公告)日：2020-09-08
申请号：US15959230
申请日：2018-04-22
Applicant: University of Science and Technology Beijing , Tangshan first Tang Baosheng functional materials Co., Ltd.
Inventor： Rong Zhu , Guangsheng Wei , Tianping Tang , Kai Dong , Liangxin Zhao , Xuetao Wu , Fengwu Chen
Abstract: A production method for smelting clean steel from full-scrap steel using duplex electric arc furnaces. Electric arc furnaces located in two positions are connected in series, wherein the electric arc furnace in a first position is dephosphorization electric arc furnace, and the electric arc furnace in a second position is a decarbonization electric arc furnace. The production method includes: performing smelting by combining a decarbonization electric arc furnace and 1-3 dephosphorization electric arc furnaces; a specific process of performing the smelting includes: in a charging period of the 1-3 dephosphorization electric arc furnaces, adding the full-scrap steel for the smelting, lime, slag in the decarbonization electric arc furnace, auxiliary materials and carbon powder or a carbon block into the dephosphorization electric arc furnace.
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