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.

公开(公告)号：US20220325368A1

公开(公告)日：2022-10-13

申请号：US17440648

申请日：2020-08-11

Applicant: University of Science and Technology Beijing

Inventor： Rong ZHU ,  Weifeng LI ,  Guangsheng WEI ,  Chao FENG ,  Kai DONG ,  Runzao LIU ,  Yun ZHOU ,  Qiang RUAN ,  Guoli WEI ,  Deyong WANG ,  Qingde ZHU ,  Zhiguo HAN

IPC: C21C5/35 ,  C21C7/00

Abstract: There is provided a method of dynamic control for a bottom blowing O2—CO2—CaO converter steelmaking process. In the process, O2 is adopted as a top blowing gas, a mixed gas O2+CO2 is adopted as a bottom blowing carrier gas to inject lime powders into the converter from a bottom blowing tuyere. The ingredients of the molten steel in the converter steelmaking process are predicted based on the conservation of matter, in combination with the ingredient data of charged molten iron, the ingredient data of the converter gas in the converter blowing process, and working conditions of the bottom blowing device. The top blowing oxygen amount, the bottom blowing gas ratio and the flow rate of lime powder are dynamically adjusted stage by stage according to requirements for target ingredients at the end point of blowing.

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.