公开(公告)号：US10808290B2

公开(公告)日：2020-10-20

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: C21C7/10 ,  C21C7/064 ,  C21C5/52 ,  C21C7/00 ,  C21C7/072

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 mediums are 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. A 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：US10767239B2

公开(公告)日：2020-09-08

申请号：US15959230

申请日：2018-04-22

Applicant: University of Science and Technology Beijing ,  Tangshan first Tang Baosheng functional materials Co., Ltd.

Inventor： Rong Zhu ,  Guangsheng Wei ,  Tianping Tang ,  Kai Dong ,  Liangxin Zhao ,  Xuetao Wu ,  Fengwu Chen

IPC: C21C7/064 ,  C21C5/52 ,  C21C5/56 ,  C21C5/30 ,  C21C7/068 ,  C21C7/00

Abstract: A production method for smelting clean steel from full-scrap steel using duplex electric arc furnaces. Electric arc furnaces located in two positions are connected in series, wherein the electric arc furnace in a first position is dephosphorization electric arc furnace, and the electric arc furnace in a second position is a decarbonization electric arc furnace. The production method includes: performing smelting by combining a decarbonization electric arc furnace and 1-3 dephosphorization electric arc furnaces; a specific process of performing the smelting includes: in a charging period of the 1-3 dephosphorization electric arc furnaces, adding the full-scrap steel for the smelting, lime, slag in the decarbonization electric arc furnace, auxiliary materials and carbon powder or a carbon block into the dephosphorization electric arc furnace.