Energy and Economic Assessment of Blast Furnace Ironmaking Operated under Nitrogen Free and Top Gas Recycling Conditions
Blast furnace ironmaking is the major route for iron production and likely to remain competitive against alternative ironmaking processes for the coming decades.Further blast furnace development targets decreasing coke consumption and overall CO2 emissions and nitrogen-free blast and top gas recycling are two potential measures to achieve these purposes.This paper analyses the effects of nitrogen free blast and top gas recycling on the operation of a blast furnace in comparison with a conventional blast furnace.The results show that recycling of top gas consisting of CO and CO2 is an effective measure to control the raceway combustion temperature.However,recycling of top gas will require the combination of an oxyfuel gasifier in which gasification of carbon by CO2 will occur and the generated reducing gas heated to 1400 -1700℃.It not only utilises the reduction capability of the top gas,but also is expected to reduce operating costs by up to US$5/THM.
blast furnace ironmaking pure oxygen blast,top gas recycling,oxyfuel gasifier
ZHANG Guangqing PINSON David
School of Mechanical,Materials and Mechatronic Engineering,University of Wollongong,NSW 2522,Austral BlueScope Steel Research,BlueScope Steel Ltd.Australia
国际会议
Asia Steel International conference 2012(第五届亚洲钢铁大会)
北京
英文
1-5
2012-09-23（万方平台首次上网日期，不代表论文的发表时间）