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
Thermodynamics
M. C. F. Silva, J. B. L. M. Campos, J. D. P. Araujo
Summary: This study used computational fluid dynamics to validate the impact of bubble flow on mass transfer, identifying correlations between mass transfer and hydrodynamic parameters for predicting mass transfer with deviations around 10-20%.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Wen-Ling Li, Jian-Hong Wang, Han Chen, Lei Shao, Guang-Wen Chu, Yang Xiang
Summary: A three-dimensional CFD model coupled with a mesoscale mass transfer model was developed to simulate CO2 absorption in a microporous tube-in-tube microchannel reactor. The simulation results were validated by experimental data, showing enhanced mass transfer due to local breakage and coalescence of gas-liquid interfaces. An entrance-effect zone was revealed, and the overall mass transfer coefficient enlarged significantly with a decrease in the length of the gas-liquid collision zone, providing a theoretical basis for further optimization of the reactor.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
Wenjie Li, Shibo Wang, Jianxin Xu, Jianhang Hu, Hua Wang, Yuling Zhai, Qingtai Xiao, Ge Deng, Dongbo Li
Summary: The effect of oxygen lance arrangement on gas-slag mixing in copper converters was investigated using numerical simulation and experimental verification with a water model. The study also explored the stirring characteristics enhanced by variable-velocity blowing. The results showed that the single-row lance arrangement increased slag velocity by 17.93% and reduced disturbance to the metal phase by 27.78% compared to the double-row arrangement.
Article
Materials Science, Multidisciplinary
Chao Feng, Rong Zhu, Kai Dong, Guangsheng Wei, Baochen Han, Weifeng Li, Wenhe Wu
Summary: This study investigates the influence of CO2 and O-2 mixed injection on the jet distribution of an oxygen lance nozzle in converter steelmaking. Larger central hole and injection flow rate result in higher jet axial velocity and impact area onto a molten pool from the main blowing hole. However, the turbulent kinetic energy of the jet nozzle axis increases with the size of the central hole and injection flow rate, leading to an increase in offset angle of the actual jet velocity and advancement of coalescence point of each jet.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Wenliang Dong, Anjun Xu, Haibo Li, Shunkuan Guan, Chenxi Ji, Ning Hao, Xiaoxuan Deng
Summary: The reaction mechanism between CO2 and molten steel during the converter process was studied through thermodynamic calculations. Industrial trials were conducted in a 300t converter. The findings suggest that blowing CO2 into the converter during the peak decarburization period improves its utilization rate.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2022)
Article
Engineering, Chemical
Tomasz Plusa, Jan Talaga, Andrzej Duda, Piotr Duda
Summary: This paper presents the results of measurements in uncovered baffled and unbaffled stirred tanks, using Laser Doppler Anemometry (LDA) to simulate mixing dynamics. Three turbulence models were verified and simulations were performed in both steady- and transient-state approaches. A simplified numerical model without the central vortex was proposed to reduce computational time, which can be used for designing and optimizing the mixing process.
Article
Astronomy & Astrophysics
Ryuki Hyodo, Keisuke Sugiura
Summary: Top-shaped asteroids with moons and equatorial ridges have been observed and studied, and it is suggested that their unique shapes are a result of axisymmetric landslides during a fast spin-up. Continuous simulations show that these asteroids initially form a particulate disk which eventually spreads and produces moons. The study also explains the formation of equatorial ridges through the selective re-accretion of disk particles.
ASTROPHYSICAL JOURNAL LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Mingming Li, Lei Shao, Qiang Li, Zongshu Zou
Summary: Oxygen-powder injection from a BOF lance can cause erosion to the lance nozzle, with the most serious erosion occurring in the nozzle convergent section. The erosion rate and distribution are significantly influenced by powder blowing parameters, and reducing the powder feeding rate and increasing particle size can help reduce erosion downstream of the nozzle divergent section.
Article
Thermodynamics
Qi Wang, Enlu Wang, Qi An, Oguga Paul Chionoso
Summary: In order to effectively utilize biomass as a supplementary fuel for pulverized coal injection (PCI) technology, a co-injection process of bio-syngas/coal into the blast furnace (BF) is designed. A 3D CFD model with double lance is established to investigate the co-injection process. The effects of bio-syngas injection rates and the location of the double lance on the thermochemical behavior of pulverized coal (PC) are analyzed.
Article
Multidisciplinary Sciences
Mahmut Aydogdu, Enes Gul, Omerul Faruk Dursun
Summary: This study examines the influence of sill geometry and flip bucket structure on the characteristics of stilling basins. The results show that sill geometry strongly affects the hydraulic jump characteristics, with the Type-3 sill performing the best in terms of energy dissipation.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Engineering, Civil
Alireza Khoshkonesh, Blaise Nsom, Farhad Bahmanpouri, Fariba Ahmadi Dehrashid, Atefeh Adeli
Summary: The paper evaluated the effects of the opening width of a dam site on the evolution of partial dam-break waves. It was found that decreasing the opening width decreases wave front travel distance, outflow discharge values, and Froude number values, while increasing air bubbles entrained within the wave.
WATER RESOURCES MANAGEMENT
(2021)
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
Mechanics
M. Finster, H. Chaves, R. Schwarze
Summary: Axial modulation of liquid jets can cause the well-known 'bunching' effect, which enhances the mechanical impact of the jet on a solid surface. This study used the VOF methodology to simulate jets with axial velocity modulation, aiming to accumulate the ejected liquid at the tip of the jet. The results provide a better understanding of the accumulation process and estimate the improvement of impact behavior through jet modulation.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2023)
Article
Thermodynamics
Galih Bangga, Thorsten Lutz
Summary: The study assesses the ability of CFD and BEM methods for accurate load predictions on a wind turbine rotor, finding good agreement between both methods and experimental data on mean load levels and load fluctuations with differences of less than 10% for most radial stations.
Article
Engineering, Chemical
Lingling Liu, Shibo Kuang, Baoyu Guo, Aibing Yu
Summary: Optimization of ironmaking blast furnaces involves considering bottom and top operations. A recently developed integrated BF model and numerical orthogonal experiments are used to predict BF performance indicators and conduct multi-objective optimization and operatable zone identification.
CHEMIE INGENIEUR TECHNIK
(2023)
Article
Energy & Fuels
Lingling Liu, Shibo Kuang, Baoyu Guo, Aibing Yu
Summary: Oxygen blast furnace (OBF) is a low carbon ironmaking technology that suffers from high gas flame temperature. Injecting COREX off-gas (CROG) into the industrial BF can improve coal combustion and overall performance. The optimum injection rate of CROG helps achieve better fuel economy by enhancing indirect reduction and coke combustion.
Article
Materials Science, Multidisciplinary
Yang Yu, Baokuan Li, Zhongqiu Liu, Fengsheng Qi, Chengjun Liu, Wenjie Rong, Shibo Kuang
Summary: This paper presents a 3D transient mathematical model to simulate the behavior of ferrochrome settling in an industrial furnace. The model clarifies various smelting phenomena and quantifies the effects of phase voltage. Results show that real-time reduction reactions determine the location and output of ferrochrome droplets. The findings can be utilized to improve the operation of submerged arc furnaces and reduce energy consumption while enhancing ferrochrome quality.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Yang Yu, Baokuan Li, Zhongqiu Liu, Fengsheng Qi, Chengjun Liu, Wenjie Rong, Shibo Kuang
Summary: A novel structure of direct current (DC) submerged arc furnace is investigated for ferrochrome production to save electric energy. The effects of key variables such as electrode insertion depth and operating voltage on electrical energy consumption are quantified. Increasing the electrode insertion depth and electric voltage can effectively reduce the electrical energy consumption and increase the chromium to iron ratio. Additional factors such as burden porosity and metallic oxide percentage also impact the electrical energy consumption.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Lulu Jiao, Shibo Kuang, Yuntao Li, Xiaoming Mao, Hui Xu, Aibing Yu
Summary: The non-uniform distribution of ore-to-coke ratio in blast furnaces affects the thermal and fluid states inside the furnace and overall performance. Numerical simulation reveals that non-uniform burden distribution leads to uneven temperature, gas distribution, and chemical reactions, which influence the furnace's performance.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Qiang Li, Petrus Christiaan Pistorius
Summary: This study reviews the evolution of multiphase flow models and their gaps in a multiscale framework, clarifies the advantages of large dispersed-phase resolved direct numerical simulation (LDPR-DNS) compared to traditional computational fluid dynamics, and investigates suitable grid spacing for LDPR-DNS with large eddy simulation (LES). The high-resolution grid model was used to examine the effects of eccentricity on flow pattern, interface profile, energy transfer efficiency, inactive zone distribution, and turbulent kinetic energy and its dissipation rate. The established LDPR-DNS will greatly advance the simulation of multiphase flow towards smaller scales and more complex phenomena.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Jing Li, Shibo Kuang, Ruiping Zou, Aibing Yu
Summary: This paper numerically studies the effects of shaft gas injection technology on blast furnace performance. The results show that increasing the gas flow rate enhances the gas penetration and indirect reduction rate, but also increases the bed pressure. The penetration zone size of the shaft-injected gas is influenced by the number of shaft tuyeres and horizontal cavity depth, but their effects on blast furnace performance are limited compared to the gas flow rate.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Engineering, Chemical
Patricio Jacobs-Capdeville, Shibo Kuang, Jieqing Gan, Aibing Yu
Summary: This paper presents a numerical study on the hopper discharging process of widely polydisperse particles. It investigates the effects of particle size distributions (PSDs) and reveals that the mass discharge rate decreases with the increasing spread of number PSD (nPSD) but increases with the increasing spread of volume PSD (vPSD). The study also analyzes the discharging process in terms of packing density, coordination number, velocities, and force network, and finds that increasing PSD spread leads to increased packing density but reduced coordination.
Article
Engineering, Chemical
Fei Xiao, Min Luo, Fayuan Huang, Mengmeng Zhou, Jianchuan An, Shibo Kuang, Aibing Yu
Summary: This paper presents a modified vortex elbow designed to handle coarse particles, and studies the gas-solid flows and wall erosion using a combined approach of discrete element model and computational fluid dynamics. The effects of particle size on flow characteristics and elbow erosion are quantified and compared with a standard elbow. The results show that the modified vortex elbow decreases the maximum penetration ratio and total penetration depth for all particle sizes, with more significant effects for larger particles. The wall erosion is also explained using flow characteristics.
Article
Engineering, Chemical
Li Ji, Puja Paul, Bhuvana K. Shanbhag, Ian Dixon, Shibo Kuang, Lizhong He
Summary: This review summarizes the emerging applications of hydrocyclones in food and bioproduct processing. While hydrocyclones are efficient in removing larger particles such as mammalian cells, separating small cells like yeast is more challenging. Strategies such as decreasing body diameters and increasing inlet velocities have been explored to tackle this challenge at the cost of increasing the water split at underflow and reducing the concentration ratio.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Han Zhang, Hong Lei, Changyou Ding, Shifu Chen, Yuanyou Xiao, Qiang Li
Summary: The blowing of argon at the bottom of the ladle has been used in ladle metallurgy for several decades, but the problem of bubble breakage and coalescence remains unsolved. The Euler-Euler model and population balance model (PBM) were coupled to investigate the complex fluid flow in the gas-stirred ladle. Numerical results showed that neglecting bubble breakage in the mathematical model led to incorrect bubble distribution. Turbulent eddy coalescence was found to be the main mode of bubble coalescence in the ladle, while wake entrainment coalescence was a minor mode. The number of bubble-size groups was a key parameter in describing bubble behavior, and a size group number of 10 was recommended for predicting the bubble-size distribution.
Article
Materials Science, Multidisciplinary
Qiang Li, Suwei Ma, Mingxia Feng, Hong Lei, Zongshu Zou
Summary: To achieve the Best Efficiency Point (BEP) of mechanically stirred multiphase reactors, a quantitative correlation between stirring power and reagent utilization rate was established using a droplet-resolved model based on LDPR-VoF approach and LES simulation. The characteristics of entrainment and dispersion of the lighter reagent and its energy utilization were explored under different design and operating conditions. A correlation formula was obtained to evaluate the utilization rate of stirring power on refining performance and optimize the design and operation parameters.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Changyou Ding, Hong Lei, Han Zhang, Meng Xu, Yan Zhao, Qiang Li
Summary: The tundish is the last refractory metallurgical reactor during the continuous casting process, and the fluid flow in the tundish is crucial for controlling inclusion collision and removal. Numerical simulation is used to investigate the flow field, RTD curve, and inclusion field. The results showed good agreement between the predicted RTD curve and the experimental data. Furthermore, it was found that the fluid velocity at the tundish inlet exponentially influences the dimensionless tundish inclusion volume concentration, radius, and inclusion removal ratio.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Chemical
Fayuan Huang, Shibo Kuang, Ruiping Zou, Bodhisattwa Chaudhuri, Aibing Yu
Summary: This paper presents a numerical study of tribocharging during pneumatic conveying and validates the model using specific charge measurements. It quantifies the cumulative charge and its effect on horizontal pneumatic conveying. The study establishes a phase diagram to predict charging modes and analyzes flow characteristics to understand charging phenomena.
Article
Metallurgy & Metallurgical Engineering
Xinyang Zhang, Lulu Jiao, Junjie Li, Shibo Kuang, Aibing Yu
Summary: This study presents a numerical investigation on the effect of belly diameter to effective height ratio (RD-H) on the performance of ironmaking blast furnace (BF). The results recommend an optimal RD-H range for BF designers, which ensures low coke rate, low gas pressure drop, high productivity, and high thermal energy utilization.
STEEL RESEARCH INTERNATIONAL
(2023)
