Burden Distribution in Shaft Furnace for Direct Reduction of Iron Ores

Kume, Shoichi; Hachisuka, Kunio; Sugiyama, Takashi; Wakabayashi, Toru; Kaharu, Rikuo; Suga, Yoshisato

doi:10.2355/tetsutohagane1955.71.1_41

Cited by 2 publications

(1 citation statement)

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“…[6][7][8][9][10][11][12] Many research related to the reduction shaft furnace had been reported. [13][14][15][16][17][18][19][20][21][22][23][24][25] For example, Kato et al 13) aimed to reduce CO 2 emission from industrial energy processes, investigated the application of carbon recycling ironmaking system in a shaft furnace. They proposed the feasibility of application of CO/CO 2 mixture gas in shaft furnace, and give the guidelines about top gas recycling for our work.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Yield of Metallic Fe by COG in a Shaft Furnace in the Case of O<sub>2</sub> Pyrolysis

et al. 2021

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Reduction shaft furnace is an effective process to produce Direct Reduced Iron (DRI), in which natural gas is used as reducing agent and heat source. Recently, in some countries lacking natural gas resources, Coke Oven Gas (COG) was proposed to be used in shaft furnace process instead of natural gas. In the present work, the effect of COG consumption on the yield of metallic Fe in shaft furnace was thermodynamically calculated. Both the chemical equilibrium and heat balance were considered. The main findings include, in shaft furnace process, the COG consumption as heat source is more than that as reducing agent. In the case of directly supplying reformed COG, the yield of metallic Fe decreases with increasing formation temperature of metallic Fe. For a coke oven with capacity of 600 000 tons, as the formation temperature are 850°C and 900°C, the corresponding annual yields of shaft furnace are 253.58 × 10 3 tons/year and 249.48 × 10 3 tons/year. In the case of ZR technology followed by supplying extra COG, the yield of metallic Fe first increases and then decreases, and there is a peak value. For a coke oven with capacity of 600 000 tons, as the formation temperature are 845°C and 900°C, the corresponding annual yields of shaft furnace are 283.44 × 10 3 tons/year (maximum value) and 278.38 × 10 3 tons/year. The findings from this work may provide guidelines for choosing optimal parameters for an actual shaft furnace process.

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Section: Introductionmentioning

confidence: 99%

Theoretical Yield of Metallic Fe by COG in a Shaft Furnace in the Case of O<sub>2</sub> Pyrolysis

et al. 2021

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Steel flow and inclusion separation in continuous casting tundishes

Tacke¹,

Ludwig

1987

Steel Research

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A model for the calculation of flow patterns and inclusion separation in continuous casting tundishes is described. Velocity and turbulence fields for the liquid steel are calculated, assuming three-dimensional, turbulent steady-state flow. A transport equation for particles is solved, which takes into account buoyancy, convection und turbulent dispersion. Particle concentration fields and the percentage of removed particles are calculated as a function of particle rise velocity. The influence of increased tundish width and height and of dams and weirs on the rate of inclusion separation is investigated for a slab caster tundish. Non-dimensional representations and approximation expressions are discussed and used to compare the computed removal rates to measured values from literature. Stahlstromunq und EinschluBabscheidung in GieBverteilern von StranggieBanlagen. Ein Modell zur Berechnung von Stromungsprofilen und EinschluBabscheidung in Verteilerqefalsen von StranggieBanlagen wird beschrieben. Geschwindigkeitsund Turbulenzfelder fur flussiqen Stahl werden unter Annahme eines dreidimensionalen, turbulent stationaren Strornunqszustandes berechnet. Unter Berucksichtiqunq von Antrieb, Konvektion und turbulenter Dispersion wird eine Transportgleichung fur Teilchen erstellt. Konzentrationsfelder der Teilchen und der Prozentsatz der abgeschiedenen Teilchen werden als Funktion der Teilchen-Aufstiegsgeschwindigkeit berechnet. Der EinfluB einer Verqrolserunq des Verteilerqefafses in Breite und Hohe sowie von Dammen und Wehren auf die Abscheidungsrate von Einschliissen wird fur ein VerteilergefaB einer Brammenstrang-gieBanlage ermittelt. Dimensionslose Darstellungen und Naherunqsforrneln werden diskutiert und zum Vergleich von berechneten Abscheidungsraten mit MeBwerten aus der Literatur verwendet.

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Burden Distribution in Shaft Furnace for Direct Reduction of Iron Ores

Cited by 2 publications

References 0 publications

Theoretical Yield of Metallic Fe by COG in a Shaft Furnace in the Case of O<sub>2</sub> Pyrolysis

Theoretical Yield of Metallic Fe by COG in a Shaft Furnace in the Case of O<sub>2</sub> Pyrolysis

Steel flow and inclusion separation in continuous casting tundishes

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