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.

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.