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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
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.
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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
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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3.发明申请公开(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
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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