Kinetic Study on Reduction of FeO in a Molten HIsarna Slag by Various Solid Carbon Sources

To investigate the reduction behaviour of different reductants such as charcoal (CC), thermal coal (TC), and carbon black (CB) with HIsarna slag, a series of isothermal reduction experiments were performed in a vertical tube resistance furnace (VTF), coupled with a Quadrupole mass spectrometer (QMS)...

Full description

Saved in:
Bibliographic Details
Published in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2023-02, Vol.54 (1), p.163-177
Main Authors: Htet, Theint Theint, Yan, Zhiming, Khasraw, Darbaz, Hage, Johannes, Meijer, Koen, Li, Zushu
Format: Article
Language:English
Subjects:
Carbon
Carbon black
Carbonaceous materials
Characterization and Evaluation of Materials
Charcoal
Chemical reaction control
Chemical reactions
Chemistry and Materials Science
Coal
Diffusion
Electric resistance furnaces
Experiments
Gases
Iron
Materials Science
Metallic Materials
Metallurgy
Microscopes
Molybdenum
Nanotechnology
Nucleation
Original Research Article
Quadrupoles
Reaction control
Reducing agents
Slag
Structural Materials
Surfaces and Interfaces
Thin Films
Three dimensional models
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:To investigate the reduction behaviour of different reductants such as charcoal (CC), thermal coal (TC), and carbon black (CB) with HIsarna slag, a series of isothermal reduction experiments were performed in a vertical tube resistance furnace (VTF), coupled with a Quadrupole mass spectrometer (QMS) at 1450 °C, 1475 °C and 1500 °C. The results confirm that the highest overall reduction rate was achieved by CC, followed by TC and CB. The reduction mechanism between FeO containing molten slag and the selected carbonaceous materials is determined by studying the morphology of the water quenched samples at the intervals of 1.5, 3 and 5 minutes, using optical and scanning electron microscopes. The results reveal that the overall reaction is controlled by two main mechanisms: (1) nucleation and growth of CO bubbles, proceeded by the gaseous intermediates CO and CO 2 ; and (2) diffusion of FeO in the molten slag. The initial reduction period in which chemical reaction control is dominant, can be described by the Avrami–Erofeev model, whereas the final period is described by the three-dimensional diffusion model.
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-022-02677-1