Article
Metallurgy & Metallurgical Engineering
Ming Lv, Shuangping Chen, Hang Li, Hongmin Guo, Jinke Li, Tao Li
Summary: Studying the variation in jet characteristics of an oxygen lance nozzle is important for the converter smelting process. The study found that the worn oxygen lance nozzle exit affects the gas jet, stirring characteristics, and molten bath velocity distribution. Industrial tests further confirmed the impact of nozzle wear on the content of substances in the molten bath.
IRONMAKING & STEELMAKING
(2023)
Article
Metallurgy & Metallurgical Engineering
Guangqiang Liu, Kun Liu, Peng Han
Summary: The metallurgical performance of a double-parameter oxygen lance in a 260 t converter was studied, focusing on the influence of nozzle arrangement on cavity size, mixing ability, and splashing capacity. Results showed that nozzle inclination affected cavity diameter while nozzle flow ratio impacted cavity depth. Increasing large-nozzle gas flow rate improved stirring strength but could result in increased splashing, highlighting the need for flow control to prevent steel splash.
IRONMAKING & STEELMAKING
(2021)
Article
Materials Science, Multidisciplinary
Guoli Wei, Changli Zhou, Shaoyan Hu, Jun Tian, Rong Zhu, Deyong Wang, Qingde Zhu
Summary: In recent years, the utilization of CO2 in the steelmaking process has gained extensive attention. This study investigated the effect of mixing CO2 on the jet characteristics of an oxygen lance through numerical simulation and conducted an industrial experiment. The results showed that mixing CO2 can reduce the phosphorus content in the molten steel and improve the dephosphorization efficiency.
Article
Engineering, Chemical
Jun Li, Zheng Ma, Chaoyun Chen, Jieyu Zhang, Bo Wang
Summary: This study investigates the impact of cyclone oxygen lance in the steelmaking process. Through numerical simulation and physical model verification, it is found that the cyclone oxygen lance can reduce upward splashing, increase penetrating depth and reaction area, and have a positive effect on the turbulent kinetic energy and rotation of the molten bath.
Article
Metallurgy & Metallurgical Engineering
Peng-Yuan Dong, Shu-Guo Zheng, Miao-Yong Zhu
Summary: The flow field characteristics of conventional four-hole oxygen lance and single-flow post-combustion (PC) oxygen lance at steelmaking temperature were studied using numerical simulation. Industrial trials were conducted in a 120 t top-blown converter to evaluate their metallurgical effects. The results showed that the PC oxygen lance had better jet characteristics compared to the conventional lance in both radial and axial directions. The industrial trials demonstrated that using the PC oxygen lance reduced blowing time, actual oxygen consumption, and increased dephosphorization rate, while also solving the problem of splashing or drying caused by increasing the oxygen flow rate of the conventional lance.
IRONMAKING & STEELMAKING
(2023)
Article
Materials Science, Multidisciplinary
Ji-A Lee, Chang-Su Ha, Jeong-Whan Han
Summary: Research on post-combustion behavior of supersonic jets is needed, as most studies on post-combustion have been conducted using subsonic nozzles while actual converter processes use supersonic nozzles. This study used a converter simulator and a supersonic nozzle to investigate the effect of nozzle height on post-combustion behavior. The analysis showed that the lowest gas velocity and widest distribution of high temperature and reaction zones were observed under the condition of the highest nozzle height of 530 mm.
KOREAN JOURNAL OF METALS AND MATERIALS
(2023)
Article
Metallurgy & Metallurgical Engineering
Chao Liu, Shu-guo Zheng, Miao-yong Zhu
Summary: This study investigates the impact of different nozzle arrangements on the characteristics of oxygen jet using a computational fluid model. The study found that the offset degree of the secondary hole-center hole-secondary hole affects the jet behavior, and the migration degree of the peripheral hole influences the velocity of the peripheral jet.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Pengyuan Dong, Shuguo Zheng, Miaoyong Zhu
Summary: By comparing the gas-metal-slag interaction between traditional oxygen lance and single-flow postcombustion (PC) lance, it was found that the PC lance is more effective in stirring and mixing the liquid bath. Industrial trials also confirmed the optimization of metallurgical properties achieved by the PC lance.
Article
Metallurgy & Metallurgical Engineering
Ming Lv, Hang Li, Xiangdong Xing, Tengchang Lin, Shaoyan Hu, Kun Xie
Summary: The characteristics of gas jet and wall shear stress are affected by the swirl angle and blowing time, with the twisted lance having a significant impact on the molten pool flow field. The fluctuating intensity of slag surface and molten steel surface changes significantly with blowing time.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Metallurgy & Metallurgical Engineering
Ming Lv, Hang Li, Tengchang Lin, Kun Xie, Kui Xue
Summary: The study found that the swirl angle of the oxygen lance has a significant effect on the gas-slag-metal coupling in the converter steelmaking process. With an increase in swirl angle, there are changes in gas flow velocity, and the coverage area and splashing amount of the slag layer are reduced.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Engineering, Chemical
Teresa Marti-Rossello, Paul Ray, Jun Li, Leo Lue
Summary: A mathematical model was developed and validated for the operation of a thermal lance, focusing on heat transfer and kinetics behavior. The combustion rate window for the thermal lance operation is mainly determined by the oxygen partial pressure, which can be adjusted by manipulating the oxygen supply flow rate. An open issue is the lack of experimental kinetics data for thermal lance combustion.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Metallurgy & Metallurgical Engineering
Bogdan Nenchev, Chinnapat Panwisawas, Xiaoan Yang, Jun Fu, Zihui Dong, Qing Tao, Jean-Christophe Gebelin, Andrew Dunsmore, Hongbiao Dong, Ming Li, Biao Tao, Fucun Li, Jintong Ru, Fang Wang
Summary: The steel industry utilizes sensors and artificial intelligence to process large amounts of data, optimizing process-performance and predicting product quality. This contributes to the digitalization of the steel industry.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Lin Li, Shan Yu, Ye Sun, Yan Liu, Ren Chen, Peiwen Hu
Summary: This study investigated the injection of limestone powder into the basic oxygen furnace process, and simulated the process using a multi-fluid flow model. The results showed that the powder injection had little effect on the depth of the oxygen-powder mixture jets, but decreased the width. Most of the powder particles gathered around hot spots, while the rest were carried out of the furnace or penetrated into the molten bath. The swirling flow of the oxygen lance decreased the amount of powder particles carried by the reflecting stream, resulting in a varied concentration distribution in the molten bath.
Article
Metallurgy & Metallurgical Engineering
Amjad Asad, Ruediger Schwarze
Summary: This study investigates the combined influence of reactive cleaning and active filtration on inclusion removal through numerical simulations. Results show that reactive cleaning plays a dominant role in enhancing melt cleanliness, highlighting its significant positive effect despite the short time of the reactive phase of the filters. The findings emphasize the importance of reactive cleaning in the steel casting industry for improving inclusion removal and steel quality.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Hongbin Jia, Yanxin Li, Kun Liu, Lianghua Feng
Summary: This study investigates the influence of structural and process parameters on converter steelmaking using a six-nozzle staggered oxygen lance and the traditional six-nozzle oxygen lance. The research reveals that the staggered oxygen lance nozzle exhibits better performance compared to the traditional nozzle, reducing splash amount and increasing the effective impact area.
