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：US20220340986A1

公开(公告)日：2022-10-27

申请号：US17049449

申请日：2020-01-21

Applicant: University of Science and Technology Beijing

Inventor： Rong ZHU ,  Chao FENG ,  Guangsheng WEI ,  Baochen HAN ,  Kai DONG ,  Xueliang WANG ,  Wenhe WU ,  Shaoyan HU ,  Weifeng LI ,  Juanjuan JIANG ,  Jianfeng DONG

IPC: C21C5/32 ,  C21C5/46

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.

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：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：US20190048430A1

公开(公告)日：2019-02-14

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

IPC: C21C7/064 ,  C21C7/00 ,  C21C7/072 ,  C21C5/52

CPC classification number: C21C7/0645 ,  C21C5/5264 ,  C21C7/0025 ,  C21C7/072 ,  C21C2005/5258 ,  Y02P10/143 ,  Y02P10/216

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 medium is 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; 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.