Medium oxygen enriched blast furnace with top gas recycling strategy

Top gas recycling oxygen blast furnace（TGR-OBF）process is a promising ironmaking process.The biggest challenge of the TGR-OBF in operation is the dramatic decrease of top gas volume（per ton hot metal）,which once led to hanging-up and shutdowns in practice of the Toulachermet.In order to avoid this w...

Full description

Saved in:
Bibliographic Details
Published inJournal of iron and steel research, international Vol. 24; no. 8; pp. 778 - 786
Main Authors Zhang, Wei, Xue, Zheng-liang, Zhang, Ju-hua, Wang, Wei, Cheng, Chang-gui, Zou, Zong-shu
Format Journal Article
LanguageEnglish
Published Singapore Elsevier Ltd 01.08.2017
Springer Singapore
Subjects
Applied and Technical Physics
Carbon consumption
Emission
Engineering
Machines
Manufacturing
Materials Engineering
Materials Science
Metallic Materials
Operation
Optimization
Oxygen blast furnace
Physical Chemistry
Processes
Top gas recycling
Top gas volume
体积测定
氧气高炉
火焰温度
炉顶煤气
炼铁工艺
煤气回收利用
环氧
高炉炉顶
Top gas recycling
Top gas volume
Carbon consumption
Emission
Operation
Oxygen blast furnace
Optimization
Online AccessGet full text
ISSN1006-706X
2210-3988
DOI10.1016/S1006-706X(17)30117-6

Cover

More Information
Summary:Top gas recycling oxygen blast furnace（TGR-OBF）process is a promising ironmaking process.The biggest challenge of the TGR-OBF in operation is the dramatic decrease of top gas volume（per ton hot metal）,which once led to hanging-up and shutdowns in practice of the Toulachermet.In order to avoid this weakness,the strategy of medium oxygen blast furnace was presented.The maneuverable zone of the TGR-OBF was determined by the top gas volume,which should not be far from the data of the traditional blast furnace.The deviation of ±12.5% was used,and then the maneuverable blast oxygen content is from 0.30 to 0.47 according to the calculation.The flame temperature and the top gas volume have no much difference compared to those of the traditional blast furnace.The minimum carbon consumption of 357 kg per ton hot metal in the maneuverable zone occurs at the oxygen content of 0.30（fuel saving of 14%）.In the unsteady evolution,the N2 accumulation could approach nearly zero after the recycling reached 6 times.Thus far,some TGR-OBF industrial trials have been carried out in different countries,but the method of medium oxygen enriched TGR-OBF has not been implemented,because the accumulation of N2 was worried about.The presented strategy of medium oxygen enriched TGR-OBF is applicable and the strategy with good operational performance is strongly suggested as a forerunner of the full oxygen blast furnace.
Bibliography:Oxygen blast furnace Top gas recycling Top gas volume Carbon consumption Operation Emission Optimization
Top gas recycling oxygen blast furnace（TGR-OBF）process is a promising ironmaking process.The biggest challenge of the TGR-OBF in operation is the dramatic decrease of top gas volume（per ton hot metal）,which once led to hanging-up and shutdowns in practice of the Toulachermet.In order to avoid this weakness,the strategy of medium oxygen blast furnace was presented.The maneuverable zone of the TGR-OBF was determined by the top gas volume,which should not be far from the data of the traditional blast furnace.The deviation of ±12.5% was used,and then the maneuverable blast oxygen content is from 0.30 to 0.47 according to the calculation.The flame temperature and the top gas volume have no much difference compared to those of the traditional blast furnace.The minimum carbon consumption of 357 kg per ton hot metal in the maneuverable zone occurs at the oxygen content of 0.30（fuel saving of 14%）.In the unsteady evolution,the N2 accumulation could approach nearly zero after the recycling reached 6 times.Thus far,some TGR-OBF industrial trials have been carried out in different countries,but the method of medium oxygen enriched TGR-OBF has not been implemented,because the accumulation of N2 was worried about.The presented strategy of medium oxygen enriched TGR-OBF is applicable and the strategy with good operational performance is strongly suggested as a forerunner of the full oxygen blast furnace.
11-3678/TF
ISSN:1006-706X
2210-3988
DOI:10.1016/S1006-706X(17)30117-6