Numerical Simulation of Oxy-Natural Gas Combustion in an Electric Arc Furnace

2019 ◽  
Author(s):  
Y. Chen ◽  
Y. Krotov ◽  
A. Silaen ◽  
G. Tang ◽  
K. Vanover ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Natural Gas ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Gas Combustion ◽  
Natural Gas Combustion

Modeling of Post-Combustion in an Electric Arc Furnace

2017 ◽  
Author(s):  
Guangwu Tang ◽  
Wenjie Liu ◽  
Armin K. Silaen ◽  
Chenn Q. Zhou
Keyword(s):  
Natural Gas ◽  
Fuel Injection ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Cfd Model ◽  
Gas Combustion ◽  
Heat Transfer Efficiency ◽  
Operation Process ◽  
Natural Gas Combustion

In the electric arc furnace (EAF) process, post-combustion (PC) technology is applied to utilize the chemical energy in the CO and H2 evolving off of the steel bath through the injection of oxygen. PC technology also improves productivity and helps to optimize the benefits of oxygen and fuel injection. In order to obtain insight on the characteristics of PC inside an electric-arc furnace, a computational fluid dynamics (CFD) model was developed to investigate the combustion characteristics in the EAF with a flat bath assumption. The natural gas is used in EAF operation process, however, the natural gas combustion is not included in this CFD model to simplify the model towards examining the effect of CO post-combustion. The eddy-dissipation (ED) was employed to model the combustion reactions. The CFD model was validated with literature on the flow velocity and temperature profiles. The effects of CO post-combustion and the oxygen mass flow rate on the furnace heat transfer efficiency in the EAF were studied.

Reduction of electric arc furnace dust pellets by simulated reformed natural gas

2016 ◽  
Vol 126 (3) ◽  
pp. 1889-1897 ◽  
Author(s):  
Eduardo Junca ◽  
Thomaz Augusto Guisard Restivo ◽  
José Roberto de Oliveira ◽  
Denise Crocce Romano Espinosa ◽  
Jorge Alberto Soares Tenório
Keyword(s):  
Natural Gas ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Electric Arc Furnace Dust

Methodology for the Numerical Simulation of Natural Gas, Coal, and Coke Combustion in a Blast Furnace

2008 ◽  
Author(s):  
William Walker ◽  
Mingyan Gu ◽  
John D’Alessio ◽  
Neil Macfadyen ◽  
Chenn Zhou
Keyword(s):  
Numerical Simulation ◽  
Blast Furnace ◽  
Natural Gas ◽  
Pulverized Coal ◽  
High Rate ◽  
Gas Combustion ◽  
Blast Furnace Ironmaking ◽  
Coke Combustion ◽  
Ironmaking Process ◽  
Natural Gas Combustion

A blast furnace is a reaction vessel in which iron ore is converted to molten iron. High rate pulverized coal injection (PCI) into a blast furnace (BF) is an existing process that is known to decrease the amount of coke in the ironmaking process. Natural gas co-injection with pulverized coal increases the burnout and devolatilization rates of pulverized coal. Also, hydrogen produced from natural gas combustion is a powerful reducing agent of iron (III) oxide, releasing pure iron that trickles down and is eventually removed through the taphole. Due to the inherent complexity of the blast furnace ironmaking process, numerical simulation can prove to be quite difficult. This paper describes a three step methodology for modeling blast furnace combustion, and its application to a furnace in operation at USSC Hamilton Works.

scholarly journals Numerical Simulation of Bottom-Blowing Stirring in Different Smelting Stages of Electric Arc Furnace Steelmaking

Metals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 799
Author(s):  
Hang Hu ◽  
Lingzhi Yang ◽  
Yufeng Guo ◽  
Feng Chen ◽  
Shuai Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Molten Steel ◽  
Steel Slag ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Simulation Software ◽  
Model Verification ◽  
Smelting Process ◽  
Arc Furnace ◽  
Bottom Blowing

Electric arc furnace (EAF) steel bottom-blowing can effectively improve the temperature and composition uniformity of the molten pool during smelting process. To explore the effect of molten-steel characteristics on bottom-blowing at various stages of smelting, we divided the smelting process of the EAF into four stages: the melting stage, the early decarburization stage, the intermediate smelting stage, and the ending smelting stage. The numerical simulation software ANSYS Fluent 18.2 was used to simulate the velocity field of molten steel under the condition of bottom-blowing stirring in different stages in EAF steelmaking process. The properties of bottom-blowing and the kinetic conditions of the steel-slag at this interface were investigated. Our results showed that at a bottom-blowing gas flow rate of 100 L/min, the average flow rates of the four stages were v1 = 0.0081 m/s, v2 = 0.0069 m/s, v3 = 0.0063 m/s, and v4 = 0.0053 m/s. The physical model verification confirmed the results, that is, the viscosity of molten steel decreased as the smelting progressed, and the flow velocity of the molten steel caused by the agitation of bottom-blowing also decreased, the effect of bottom-blowing decreased. Based on these results, a theoretical basis was provided for the development of the bottom-blowing process.

Analytical Electron Microscopy Characterization of Electric Arc Furnace Dust

1981 ◽  
Vol 39 ◽  
pp. 134-135
Author(s):  
J. R. Porter ◽  
J. I. Goldstein ◽  
D. B. Williams
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Dust Particles ◽  
Particle Analysis ◽  
Arc Furnace ◽  
Analytical Electron ◽  
Residual Elements ◽  
Industry Practice

Alloy scrap metal is increasingly being used in electric arc furnace (EAF) steelmaking and the alloying elements are also found in the resulting dust. A comprehensive characterization program of EAF dust has been undertaken in collaboration with the steel industry and AISI. Samples have been collected from the furnaces of 28 steel companies representing the broad spectrum of industry practice. The program aims to develop an understanding of the mechanisms of formation so that procedures to recover residual elements or recycle the dust can be established. The multi-phase, multi-component dust particles are amenable to individual particle analysis using modern analytical electron microscopy (AEM) methods.Particles are ultrasonically dispersed and subsequently supported on carbon coated formvar films on berylium grids for microscopy. The specimens require careful treatment to prevent agglomeration during preparation which occurs as a result of the combined effects of the fine particle size and particle magnetism. A number of approaches to inhibit agglomeration are currently being evaluated including dispersal in easily sublimable organic solids and size fractioning by centrifugation.

Monitoring the environmental and energy impacts of electric arc furnace steelmaking

2016 ◽  
Vol 104 (1) ◽  
pp. 102 ◽  
Author(s):  
Valentina Colla ◽  
Filippo Cirilli ◽  
Bernd Kleimt ◽  
Inigo Unamuno ◽  
Silvia Tosato ◽  
...  
Keyword(s):  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace
Sign in / Sign up

Export Citation Format

Share Document