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Your search keyword '"Bartusch H."' showing total 2 results
Start Over Author "Bartusch H." Publisher john wiley & sons
2 results on '"Bartusch H."'

1. Coke gasification in blast furnace shaft conditions with H₂ and H₂O containing atmospheres

Author

Heikkilä, A. M. (Anne M.), Koskela, A. M. (Aki M.), Iljana, M. O. (Mikko O.), Lin, R. (Rongshan), Bartusch, H. (Hauke), Heikkinen, E.-P. (Eetu-Pekka), and Fabritius, T. M. (Timo M. J.)

Subjects
solution-loss reaction, blast furnace, hydrogen, water vapor, coke gasification
Abstract

Most of world steel in 2018 has been produced from virgin iron ore via the blast furnace (BF)—basic oxygen furnace route. Therewith the BF is one of the most important unit processes in worldwide steel making. Among others, energy efficiency of the BF is dependent on coke reactivity. Coke gasification occurs via solution‐loss reactions either with CO₂ or H₂O. Herein, the gasification of coke is studied in CO–CO₂–H₂–H₂O–N₂ atmosphere simulating the BF conditions. The simulated atmospheres are based on the measurements from an actual BF. This research studies the effect of the composition of the BF atmosphere representing conditions near the wall as well as at the center and influence of the H₂O content on coke gasification under simulated BF conditions. It is found that the location plays a role in coke gasification: wall atmosphere yields higher coke gasification compared with center. Dynamic tests show that introduction of H₂ and H₂O in gas atmosphere fastens coke gasification by +119% at temperature range between 800 and 1200 °C in wall conditions. When H₂O is present in gas atmosphere, the mass loss of coke is also greater in both wall and center conditions.

Published
2021

2. Reduction of iron ore pellets, sinter, and lump ore under simulated blast furnace conditions

Author

Heikkilä, A. (Anne), Iljana, M. (Mikko), Bartusch, H. (Hauke), Fabritius, T. (Timo), Heikkilä, A. (Anne), Iljana, M. (Mikko), Bartusch, H. (Hauke), and Fabritius, T. (Timo)

Abstract

A blast furnace (BF) is the dominant process for making iron in the world. The BF is charged with metallurgical coke and iron burden materials including iron ore pellets, sinter, and lump ore. While descending in the BF the charge materials reduce. The iron‐bearing materials should reduce fast and remain in the solid form until as high a temperature as possible to ensure reaction contact with reducing gas and iron oxides. Herein, the reducibility of the iron ore pellet, sinter, and lump ore in the BF shaft are focused on. The experiments are conducted isothermally with a blast furnace simulator (BFS) high‐temperature furnace at four different temperatures (700, 800, 900, and 1000 °C) for 300 min. The experimental atmosphere consists of CO, CO₂, H₂, H₂O, and N₂ simulating the conditions in the BF shaft. It is found that lump ore has lowest reduction rate in all test conditions, and at lower temperatures iron ore pellets reduce faster than sinter, and this is reversed at higher temperatures. Furthermore, the reduction rate of sinter and iron ore pellets begins to resemble each other at higher temperatures.

Published
2020

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