公开(公告)号：US20210355554A1

公开(公告)日：2021-11-18

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

IPC: C21B13/12 ,  F27B3/19

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.

公开(公告)号：US20220235427A1

公开(公告)日：2022-07-28

申请号：US17476501

申请日：2021-09-16

Applicant: University of Science and Technology Beijing ,  Soochow University

Inventor： Rong ZHU ,  Shaoyan HU ,  Kai DONG ,  Rongfang SU ,  Weifeng LI

IPC: C21C5/46 ,  C21C5/48 ,  F27D3/16 ,  C21C5/30

Abstract: A long-life service method for powder-bottom-injecting converter based on collaborative hot replacement of furnace bottom and bottom purging brick belongs to the field of steelmaking technologies using powder-bottom-injecting converters. According to equipment characteristics, process characteristics, and erosion characteristics of the powder-bottom-injecting converter, the design, arrangement, installation, use, maintenance, and replacement of the bottom purging/powder injection bricks are systematically optimized and improved, a technology of automatically detecting the erosion height of bottom purging bricks is adopted, and hot replacement of bottom purging/powder injection bricks and hot replacement of the converter furnace bottom are used collaboratively, which not only can prolong the service life of a single bottom purging/powder injection brick, but also can greatly prolong the overall life of the powder-bottom-injecting converter from 1000-3000 heats in the prior art to 6000-10000 heats. Hence, the life of the powder-bottom-injecting converter is as long as that of a conventional converter.

公开(公告)号：US20240247328A1

公开(公告)日：2024-07-25

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

IPC: C21C5/30 ,  C21C5/46 ,  C21C7/064

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.

公开(公告)号：US20200340070A1

公开(公告)日：2020-10-29

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

IPC: C21C5/30 ,  C21C5/46 ,  C21C5/36 ,  C01G31/02 ,  B01D53/76 ,  B01D53/38

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.