ISSN 2594-357X
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Abstract
For the current hopper pressure process, blast furnace gas (BFG) diffuses into the air directly. In order to reduce gas emission and environment pollution, some new process for hopper pressure such as ballonet method, ejector method and gas substitution method are proposed. These three new technologies, with features of easy operation and high degree of automation, can achieve the purpose of gas recovery. However, ballonet method only can obtain economic benefits when the price ratio between BFG and compress gas greater than 4. Ejector method, can achieve full recovery of BFG and dust, has excellent economic and environmental benefits. Due to the need to increase the dust removal facilities and ejector, ejector method is more suitable for a new blast furnace. Gas substitution method can recovery most of BFG, but can’t avoid dust emission. Compare to traditional method, it still get a huge economic and environmental benefits. In addition, it needs less fixed investment, shows flexible operation, not only applies to a new blast furnace, but also suitable for the existing blast furnace.
For the current hopper pressure process, blast furnace gas (BFG) diffuses into the air directly. In order to reduce gas emission and environment pollution, some new process for hopper pressure such as ballonet method, ejector method and gas substitution method are proposed. These three new technologies, with features of easy operation and high degree of automation, can achieve the purpose of gas recovery. However, ballonet method only can obtain economic benefits when the price ratio between BFG and compress gas greater than 4. Ejector method, can achieve full recovery of BFG and dust, has excellent economic and environmental benefits. Due to the need to increase the dust removal facilities and ejector, ejector method is more suitable for a new blast furnace. Gas substitution method can recovery most of BFG, but can’t avoid dust emission. Compare to traditional method, it still get a huge economic and environmental benefits. In addition, it needs less fixed investment, shows flexible operation, not only applies to a new blast furnace, but also suitable for the existing blast furnace.
Keywords
Hopper pressure process; Ballonet method; Ejector method; Gas substitution method.
Hopper pressure process; Ballonet method; Ejector method; Gas substitution method.
How to refer
Xiaowei, Wang;
Em, Tang;
Xiaogang, Fan;
Qiang, Zhou;
Juyan., Li.
ANALYSIS ON PROCESS OPTIMIZING FOR HOPPER
PRESSURE MODULATION OF BLAST FURNACE
,
p. 261-269.
In: 42º Seminário de Redução de Minério de Ferro e Matérias-primas / 13º Seminário Brasileiro de Minério de Ferro / 6th International Congress on the Science and Technology of Ironmaking,
Rio de Jabeiro,
2012.
ISSN: 2594-357X
, DOI 10.5151/2594-357X-22089
