ISSN 2594-357X
34º Seminário de Redução de Minério de Ferro e Matérias-Primas — Vol. 01 , num. 34 (2004)
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Abstract
For recycling steel work dust and improving blast furnace performance, a few types of non-spherical carbon-iron oxide agglomerates were manufactured in laboratory scale and their strength and reducibility were evaluated with using shatter/tumbler testers, blast furnace simulator (BIS: simulator of lumpy zone in BF) and softening/melting tester. One of the agglomerates in the shape of column with concave triangle cross-section (Tetra) showed almost same strength compared to existing cold-bond spherical pellet. BIS proved the ferrous burden consisting of 50% Tetra and 50% sinter improved CO utilization ratio by 8%, suggesting 20–30 kg/t reduction in reducing agent ratio. Softening/melting test showed that Tetra lowered pressure loss during softening/melting, meaning that mixing of Tetra to sinter could accelerate meltdown of cohesive zone. The present study concluded that sinter-Tetra mixture had a potential to improve BF reaction efficiency drastically.
For recycling steel work dust and improving blast furnace performance, a few types of non-spherical carbon-iron oxide agglomerates were manufactured in laboratory scale and their strength and reducibility were evaluated with using shatter/tumbler testers, blast furnace simulator (BIS: simulator of lumpy zone in BF) and softening/melting tester. One of the agglomerates in the shape of column with concave triangle cross-section (Tetra) showed almost same strength compared to existing cold-bond spherical pellet. BIS proved the ferrous burden consisting of 50% Tetra and 50% sinter improved CO utilization ratio by 8%, suggesting 20–30 kg/t reduction in reducing agent ratio. Softening/melting test showed that Tetra lowered pressure loss during softening/melting, meaning that mixing of Tetra to sinter could accelerate meltdown of cohesive zone. The present study concluded that sinter-Tetra mixture had a potential to improve BF reaction efficiency drastically.
Keywords
non-spherical carbon composite agglomerate, press forming, reducibility, blast furnace, recycling
non-spherical carbon composite agglomerate, press forming, reducibility, blast furnace, recycling
How to cite
Nakano, Masanori; Naito, Masaaki.
Non-spherical Carbon Composite Agglomerate and Its Quality,
p. 627-632.
In: 34º Seminário de Redução de Minério de Ferro e Matérias-Primas,
None,
2004.
ISSN: 2594-357X, DOI 10.5151/2594-357x-34Red-627-632
