Latest Developments in Gas Purging Systems for EAF
Modern EAF processes are subject to the cost-optimized production of raw steel melt in combination with very flexible productivity.Excellent mixing of the steel melt helps to improve mass and heat transfer,in order to accelerate the melting of scrap and direct reduced iron(DRI),decarburization,homogeneous superheating,alloy distribution,and to avoid skull formation.Direct bottom gas purging not only promotes efficiently mixing of the steel melt in the entire steel bath but also provides constant gas bubble columns to avoid CO boiling retardation.As a result,the efficiencies of energy transfer,oxygen injection,and alloy addition increases in the EAF process.Typical values of process improvements are-5 to-10kWh/t and corresponding decrease of power-on time,and + 0.5%yield.Since few years EAF gas purging systems are experiencing a comeback as state-of-the-art EAF technology.This renaissance is driven by the continuous efforts for higher productivity and lower production costs of EAF steelmaking.Recent case studies and new developments are presented.It is shown that gas purging systems represent a modern EAF technology to increase energy efficiency with minimum pay-back period.
EAF gas purging process improvement energy savings alloy savings
Marcus KIRSCHEN Heiko DETTELA Karl M ZETTL
Head of Product Management BOF & EAF Gas Purging,Steel Division,RHI AG,Vienna,Austria Head of Product Management China,Steel Division,RHI,Dalian,China Head of Product Management Primary Metallurgy,Steel Division,RHI AG,Vienna,Austria
国际会议
the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)
北京
英文
259-262
2015-05-12（万方平台首次上网日期，不代表论文的发表时间）