Development of Hot Metal Dephosphorization with Lime Powder Top Blowing: Part 2. High Blowing Rate

Miyata, Masaki; Tamura, Teppei; Higuchi, Yoshihiko

doi:10.2355/isijinternational.isijint-2017-365

Cited by 19 publications

(7 citation statements)

References 12 publications

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“…In this study, the distance of between the monitor point in numerical model and the monitor point in test experiment is about 1 000 mm and therefore, the tendency of deviation change occurs. As can be seen, the results show the change tendency that the nozzle inlet pressure increases with powder injection rate increasing, which also means that the numerical simulations are reasonable on a macro basis as previous study 11) reported. Figure 6 shows the axial velocity distributions of the gas and particles of the O 2 -CaO jet at the jet centerline with different conditions.…”

Section: Model Validationsupporting

confidence: 82%

“…Where, u is the gas velocity; u p is the particle velocity; ρ is the gas density; ρ p is the particle density; d p is the particle diameter; Re is the Reynolds number and can be calculated by the following Eq. (11).…”

Section: Governing Equations and Their Closure Modelsmentioning

confidence: 99%

“…The main reason is that the interactions among the particles, the carrier gas, the shrouding CH 4 and shrouding O 2 are disorder due to the powder blowing according to the study on the fluid dynamics analysis of single gas jet with particles carried out by Masaki. 11) In the study of jet flow, the turbulence kinetic energy is also a key parameter to reflect the mixing degree among the fluid flows, which demonstrates the mean kinetic energy per unit mass associated with eddies in turbulent flow. The smaller the turbulence kinetic energy is, the weaker the mixing degree of the fluid is.…”

Section: Vorticity and Turbulent Kinetic Energy Distribu-mentioning

confidence: 99%

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Fluid Dynamics Analysis of O<sub>2</sub>–CaO Jet with a Shrouding Flame for EAF Steelmaking

et al. 2020

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Compared with the traditional addition methods of lumpy lime into the electric arc furnace (EAF) for slag making, the technology of O 2-CaO jet can deliver lime powder directly into the EAF molten bath with high speed carrier gas, which demonstrates much advantages in quick melting and effective phosphorus removal. Recently, the shrouding combustion flame was proposed and applied to strengthen the CaO import capability of the O 2-CaO jet. In this study, combining the discrete particle model (DPM) and the Eddy Dissipation Concept (EDC) model with the detailed chemical kinetic mechanisms (GRI-Mech 3.0), computational fluid dynamics (CFD) models of the O 2-CaO jet with shrouding flame, with shrouding O 2 and without shrouding gas were developed. The numerical results of CFD models were firstly validated by the experimental data. The interaction between the particles and the gas jet of the O 2-CaO jet was analyzed and how the shrouding combustion flame affected the fluid flow characteristics of the O 2-CaO jet were clarified. The shrouding high-temperature combustion flame could delay the attenuation of the axial velocity of the O 2-CaO jet, heat the CaO particles effectively and make the CaO particles cluster together in a much longer distance, which is helpful to strengthen the jet impact, accelerate the meltdown of CaO particles and improve the utilization efficiency of CaO.

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Section: Model Validationsupporting

confidence: 82%

Section: Governing Equations and Their Closure Modelsmentioning

confidence: 99%

Section: Vorticity and Turbulent Kinetic Energy Distribu-mentioning

confidence: 99%

See 1 more Smart Citation

Fluid Dynamics Analysis of O<sub>2</sub>–CaO Jet with a Shrouding Flame for EAF Steelmaking

et al. 2020

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“…Domestic and international reserachers have carried out several experiments, among which physical mineral separation, leaching, magnetization roasting, and magnetic separation constitute the main processing methods. [11][12][13][14][15] Direct reduction is short and simple, and the metallization rate can be controlled, with low requirements for the iron ore and reducing agent. This method can be employed as efficient pretreatment for the treatment of the highphosphorus iron ore. [16][17][18][19] Several studies have reported the mechanism for the carbothermal reduction of iron oxides.…”

Section: Gasification and Migration Of Phosphorus From High-phosphorumentioning

confidence: 99%

Gasification and Migration of Phosphorus from High-phosphorus Iron Ore during Carbothermal Reduction

et al. 2018

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“…The converter precipitator dust and oxide scale produced during metallurgical processes have a high iron content and few impurities. They are good secondary metallurgical resources and have great recycling value [8,9].…”

Section: Introductionmentioning

confidence: 99%

Sustainable utilization of a converter slagging agent prepared by converter precipitator dust and oxide scale

Liu

Zhang

Sun

et al. 2020

Green Processing and Synthesis

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A converter slagging agent was prepared using converter precipitator dust and oxide scale as raw materials and bentonite, calcium oxide, and soluble glass as binders. The influence of different binders on the strength of the converter slagging agent was studied. The optimum ratio of bentonite, calcium oxide, and sodium silicate was determined by orthogonal experiments. The chemical composition, strength, moisture content, alkalinity, and other indicators of the prepared converter slagging agent met the requirements for converter smelting. The drop intensity of the green pellet was 3.7 times, and the compressive strength of the dry pellet could reach 988.72 N/m2. Therefore, the sustainable utilization of converter precipitator dust and oxide scale could be realized by the preparation of a converter slagging agent.

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Development of Hot Metal Dephosphorization with Lime Powder Top Blowing: Part 2. High Blowing Rate

Cited by 19 publications

References 12 publications

Fluid Dynamics Analysis of O<sub>2</sub>–CaO Jet with a Shrouding Flame for EAF Steelmaking

Fluid Dynamics Analysis of O<sub>2</sub>–CaO Jet with a Shrouding Flame for EAF Steelmaking

Gasification and Migration of Phosphorus from High-phosphorus Iron Ore during Carbothermal Reduction

Sustainable utilization of a converter slagging agent prepared by converter precipitator dust and oxide scale

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