Heat transfer and chemical reaction models for reduction of iron oxide pellets in countercurrent moving bed reactors

P. Garnica-González, Rodolfo D. Morales, Miguel V. Toledo

Research output: Contribution to journalArticleResearchpeer-review

1 Citation (Scopus)

Abstract

Mass, energy and pressure balances are performed in a volume slice of a HyL III reactor in order to build a mathematical simulator for the different reduction steps. Three iron ore feed mixtures were simulated finding, in general, good agreement between plant data for metallization of DRI and the corresponding mathematical simulations. The main differences between these two types of data are explained as a consequence of the low efficiency of the contact between the reducing gases, H2 and CO, and the bed of solids due to the formation of clusters in the different ore feeds. This tendency observes a remarkable increase with rise of the total iron content in the ore feed. The existence of clusters promotes fluid flow malfunctions affecting the uniformity of the DRI quality expressed as it final metallization. This leads to the need of a 3D simulator which should be able to quantify this effect. Finally it was found, in the present research, that carbon monoxide plays a minor role in the dynamic behaviour of the reduction for the feed mixtures analyzed with the mathematical simulator.
Original languageAmerican English
Pages (from-to)469-475
Number of pages421
JournalSteel Research
DOIs
StatePublished - 1 Jan 1998

Fingerprint

Iron oxides
iron oxides
pellets
simulators
beds
Chemical reactions
chemical reactions
Simulators
heat transfer
reactors
Carbon Monoxide
Heat transfer
Metallizing
Ores
minerals
malfunctions
iron ores
mass balance
Iron ores
Carbon monoxide

Cite this

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title = "Heat transfer and chemical reaction models for reduction of iron oxide pellets in countercurrent moving bed reactors",
abstract = "Mass, energy and pressure balances are performed in a volume slice of a HyL III reactor in order to build a mathematical simulator for the different reduction steps. Three iron ore feed mixtures were simulated finding, in general, good agreement between plant data for metallization of DRI and the corresponding mathematical simulations. The main differences between these two types of data are explained as a consequence of the low efficiency of the contact between the reducing gases, H2 and CO, and the bed of solids due to the formation of clusters in the different ore feeds. This tendency observes a remarkable increase with rise of the total iron content in the ore feed. The existence of clusters promotes fluid flow malfunctions affecting the uniformity of the DRI quality expressed as it final metallization. This leads to the need of a 3D simulator which should be able to quantify this effect. Finally it was found, in the present research, that carbon monoxide plays a minor role in the dynamic behaviour of the reduction for the feed mixtures analyzed with the mathematical simulator.",
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Heat transfer and chemical reaction models for reduction of iron oxide pellets in countercurrent moving bed reactors. / Garnica-González, P.; Morales, Rodolfo D.; Toledo, Miguel V.

In: Steel Research, 01.01.1998, p. 469-475.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Garnica-González, P.

AU - Morales, Rodolfo D.

AU - Toledo, Miguel V.

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AB - Mass, energy and pressure balances are performed in a volume slice of a HyL III reactor in order to build a mathematical simulator for the different reduction steps. Three iron ore feed mixtures were simulated finding, in general, good agreement between plant data for metallization of DRI and the corresponding mathematical simulations. The main differences between these two types of data are explained as a consequence of the low efficiency of the contact between the reducing gases, H2 and CO, and the bed of solids due to the formation of clusters in the different ore feeds. This tendency observes a remarkable increase with rise of the total iron content in the ore feed. The existence of clusters promotes fluid flow malfunctions affecting the uniformity of the DRI quality expressed as it final metallization. This leads to the need of a 3D simulator which should be able to quantify this effect. Finally it was found, in the present research, that carbon monoxide plays a minor role in the dynamic behaviour of the reduction for the feed mixtures analyzed with the mathematical simulator.

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