Microstructure evolution and corrosion behavior of Nb-alloyed cast heat-resistant steel during different aging treatments

Teng, Lvdan; Zhao, Tao; Cheng, Tengfei; Yang, Yitao

doi:10.1007/s42243-020-00433-w

Cited by 12 publications

(2 citation statements)

References 22 publications

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“…Nag et al [ 10 ] estimated the material trajectory into a blast furnace fit with a compact bell‐less top, based on a single‐particle approach. Teng et al [ 11,12 ] established a 3D mathematical model of particle motion and analyzed the influences of section shape, length, rotating speed, and chute tilting distance on a particle's 3D movement. Yu et al [ 5,6 ] established a 1:15 cold‐scaled experimental model based on an actual 2500 m 3 blast furnace.…”

Section: Introductionmentioning

confidence: 99%

Effects of Operational Parameters on Particle Movement and Distribution at the Top of a Bell‐Less Blast Furnace Based on Discrete Element Method

Hong

Zhou

et al. 2020

steel research int.

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In blast furnaces, the chute is the key device determining burden distribution. The effects of the chute's geometric and operational parameters on burden distribution have seldom been studied. Herein, the top of a bell‐less blast furnace is modeled based on the discrete element method to investigate the effects of chute length, stock‐line level and chute angle on particle movement, and radial burden distribution. The results indicate that burden particles are more likely to slide toward the opposite to the rotating direction as the chute length or angle increases. The burden distribution segregation is mainly caused by the segregation of particle velocity on the chute and the percolation of pellet on the chute. The burden tends to aggregate with increases in chute length and disperse with increases in stock‐line level or chute angle.

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Section: Introductionmentioning

confidence: 99%

Effects of Operational Parameters on Particle Movement and Distribution at the Top of a Bell‐Less Blast Furnace Based on Discrete Element Method

Hong

Zhou

et al. 2020

steel research int.

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“…Teng et al studied the relationship between the CCC operation and top gas utilization efficiency considering the gas flow resistance inside a BF. [25] However, the structure of solid bed was simplified to a large degree and in-furnace thermal-chemical behaviors were not considered in their work. To the best of our knowledge, so far, few CCC modeling works concerning multi-phase flow and quantified thermal-chemical distributions has been systematically reported in the open literature.…”

Section: Introductionmentioning

confidence: 99%

Model Study of Blast Furnace Operation with Central Coke Charging

Shen

2019

Metall Mater Trans B

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Blast furnace (BF) remains the dominant ironmaking process worldwide. Central coke charging (CCC) operation is a promising technology for stabilizing BF operations, but it needs reliable and quantified process design and control. In this work, a multi-fluid BF model is further developed for quantitatively investigating flow-thermal-chemical phenomena of a BF under CCC operation. This model features the respective chemical reactions in the respective coke and ore layers, and a specific sub-model of layer profile for the burden structure for the CCC operation. The simulation results confirm that the gas flow patterns and cohesive zone's shape and location under the CCC operation are quite different from the non-CCC operation. Under the CCC operation, the heat is overloaded at the furnace center while the reduction load is much heavier at the periphery regions; the profiles of top gas temperature and gas utilization show bell-shape and inverse-bell-shape patterns, respectively. More importantly, these differences are characterized quantitatively. In this given case, when the CCC opening radius at the throat is 0.35 m, the cohesive zone top opening radius is around 0.50 m, and the isotherms of CCC operation become much steeper (~80 deg) than those of non-CCC operation (~60 deg) near BF central regions. In addition, it is confirmed that carbon solution-loss reaction rate can be decreased significantly at BF central regions under CCC operation. The model helps to understand CCC operation and provides a cost-effective method for optimizing BF practice.

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Effect of Nb Precipitates and Reversed Austenite Formed by QLT Process on Microstructure and Mechanical Properties of Nb-Bearing 7Ni Cryogenic Steel

Wang,

Ding,

Gong

et al. 2023

Metall Mater Trans A

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Microstructure evolution and corrosion behavior of Nb-alloyed cast heat-resistant steel during different aging treatments

Cited by 12 publications

References 22 publications

Effects of Operational Parameters on Particle Movement and Distribution at the Top of a Bell‐Less Blast Furnace Based on Discrete Element Method

Effects of Operational Parameters on Particle Movement and Distribution at the Top of a Bell‐Less Blast Furnace Based on Discrete Element Method

Model Study of Blast Furnace Operation with Central Coke Charging

Effect of Nb Precipitates and Reversed Austenite Formed by QLT Process on Microstructure and Mechanical Properties of Nb-Bearing 7Ni Cryogenic Steel

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