University of Science and Technology Beijing

Tangshan First Tang Baosheng Functional Materials Co., Ltd.

Beijing Kemi Rongcheng Energy Technology Co., Ltd.

Hbzx High Tech Co., Ltd.

Xuanhua Iron and Steel Group Co., Ltd.

Guangsheng Wei

Rong Zhu

Kai Dong

Shaoyan Hu

Chao Feng

Rongfang Su

Wenhe Wu

Xueliang Wang

Weifeng Li

Yun Zhou

Baochen Han

Xuetao Wu

Tianping Tang

Xin Li

Chunyang Wang

Yun Bj Wang

Hongbin Wang

Zhihui Li

Yongqiang Yang

Juanjuan Jiang

Jinlong Wang

Yunxiang Zhao

Huan Chang

Ceng Li

Bohan Tian

Jingxin Zhao

Liangxin Zhao

Fengwu Chen

Minghai Zhang

Jianfeng Dong

Xin Ren

Zhitao Xue

Linghui Meng

Jianping Jia

Haoran Ma

Jianzhong Wang

The application provides a method for controlling nitrogen in steelmaking by spraying hydrogen containing plasma, including: using a mixture of hydrogen rich gas and argon gas to generate hydrogen plasma for denitrification of molten steel during at least one of arc furnace smelting, ladle refining, VOD refining, and RH refining. The method for controlling nitrogen in steelmaking by spraying hydrogen containing plasma provided in the application can effectively remove nitrogen from the molten steel by spraying a mixture of argon gas and hydrogen rich gas into the molten steel through a hollow electrode and plasma torch, reducing electrode consumption and electricity consumption per ton steel, and also reducing arc radiation heat loss, improving heating rate, thereby shortening smelting time and reducing production costs.

Method for controlling nitrogen in steelmaking by spraying hydrogen containing plasma

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.

Converter bottom blowing system capable of allowing multiple media to share bottom blowing lances and method for using same

The present disclosure provides a converter CO&#x2014;Omixed 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 COand Oand 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.

Converter CO2&#x2014;O2 mixed injection smelting method and method of dynamically controlling fire point area temperature

A production apparatus and method for electric arc furnace steelmaking with a fully continuous ultra-short process are provided. A continuous adding, melting, smelting and continuous casting of a metal material are integrated, and a metallurgy process is completed in a flowing of a molten steel, to realize a continuous production of ingot blanks. The production apparatus includes four operation sites of an electric arc furnace for melting and primary refining, a sealed tapping chute for molten steel flowing, a refinement storage bed for molten-steel desulfurization and alloying and a conticaster for continuous casting A material flow, an energy flow and a time stream in the four operation sites are in a dynamic equilibrium. The production apparatus and method realize a molten-steel casting is started within 120 minutes after the metal material is started to be continuously added, and an uninterrupted continuous production is maintained for above 80 hours.

Production apparatus and method for electric arc furnace steelmaking with fully continuous ultra-short process

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 CO&#x2014;Nmixed gas through the vanadium extraction converter flue gas; obtaining second-purity CO&#x2014;Nmixed gas through the decarburization converter flue gas; obtaining O&#x2014;CO&#x2014;Nmixed gas through the decarburization converter flue gas; obtaining first-purity COgas through the second-purity CO&#x2014;Nmixed gas; and using the first-purity CO&#x2014;Nmixed gas for bottom blowing of the vanadium extraction converter, using the second-purity CO&#x2014;Nmixed gas as a carrier gas for blowing iron ore powder into the vanadium extraction converter, and using the O&#x2014;CO&#x2014;Nmixed gas and the first-purity COgas as a carrier gas for bottom blowing of the decarburization converter and bottom injecting of lime powder into the decarburization converter.

Efficient long-service-life blowing method and system for vanadium extraction-decarburization duplex converters

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.

Clean and rapid smelting method in an electric arc furnace with full scrap steel

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.

Production method for smelting clean steel from full-scrap steel using duplex electric arc furnaces

Growing community of inventors

Beijing, China

Guangsheng Wei