The Introduction and Process Optimization Research of Oxygen Blast Furnace Ironmaking Technology

Abstract

In order to reduce the energy consumption from iron and steel industry, decreasing coke rate by establishing oxygen blast furnace (OBF) ironmaking process is a favorable way. In recent years, many scholars and metallurgical workers from all over the world have made a lot of related work about this ironmaking process. The main content in this paper is as follows: The necessity, process characteristics and optimization research of OBF were introduced. The optimal OBF process were elected by the calculation of energy-mass balance mathematical model. In order to cope with the subsequent industrial test, theoretical calculation of the improved process is carried out. The process parameters under different oxygen enrichment rate 9, 19, 29%, and eventually reached 100% are calculated. Calculation results show that with the increase of oxygen enrichment rate, the recycling gas volume from both shaft tuyere and hearth tuyere were increased, the coke rate gradually is reduced and the coal rate increased gradually. After adopting the OBF ironmaking process the ironmaking costs and CO2 emissions can be greatly reduced.