ISSN 2594-5300
48º Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos — vol. 48, num.48 (2017)
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Abstract
A great amount of high temperature off-gas, whose maximum temperature is up to 2100℃, is generated during the smelting process of electric arc furnace (EAF). The dust content, which is mainly iron oxide, of the off-gas is high and worthy of industrial recovery. The heat carried by the high temperature off-gas with dust is about 11% of the total energy input of EAF, and some even is as high as 20%. The high-temperature off-gas not only takes away a lot of heat but also places a huge burden to de-dusting system of EAF. It not only reduces the iron oxide dust recovery ratio, but also causes serious pollution problems. With the development of the iron and steel industry, the proportion of molten iron for EAF gradually increases, and even more than 30% in some cases. The increase of molten iron causes increases in the amount of EAF off-gas and heat waste. As a result the problem of dust removal is worsening [1-2]. How to sufficiently recover the sensible heat of the high temperature off-gas, create conditions for efficient dust removal, thus reduce operating costs of dust removal system and the production costs is a problem which EAF steel making companies must pay attention to.
A great amount of high temperature off-gas, whose maximum temperature is up to 2100℃, is generated during the smelting process of electric arc furnace (EAF). The dust content, which is mainly iron oxide, of the off-gas is high and worthy of industrial recovery. The heat carried by the high temperature off-gas with dust is about 11% of the total energy input of EAF, and some even is as high as 20%. The high-temperature off-gas not only takes away a lot of heat but also places a huge burden to de-dusting system of EAF. It not only reduces the iron oxide dust recovery ratio, but also causes serious pollution problems. With the development of the iron and steel industry, the proportion of molten iron for EAF gradually increases, and even more than 30% in some cases. The increase of molten iron causes increases in the amount of EAF off-gas and heat waste. As a result the problem of dust removal is worsening [1-2]. How to sufficiently recover the sensible heat of the high temperature off-gas, create conditions for efficient dust removal, thus reduce operating costs of dust removal system and the production costs is a problem which EAF steel making companies must pay attention to..
Keywords
Electric arc furnace, waste heat, sedimentation efficiency
Electric arc furnace, waste heat, sedimentation efficiency
How to refer
Maolin, Dong;
Tao, Zhou.
Total Waste Heat Recovery Device for Off-gas from EAF
,
p. 764-770.
In: 48º Seminário de Aciaria, Fundição e Metalurgia de Não-Ferrosos,
São Paulo,
2017.
ISSN: 2594-5300
, DOI 10.5151/1982-9345-30860
