Melting Characteristics of Recycling Slag in Decarburization Converter and Its Application Effects  

作　　者：WU Wei MENG Hua-dong LIU Liu 

机构地区：[1]Metallurgical Technology Research Department, Central Iron and Steel Research Institute

出　　处：《Journal of Iron and Steel Research International》2013年第6期7-12,共6页

基　　金：Item Sponsored by National Key Technology Research and Development Program in 11th Five-Year Plan of China ( 2006BAE03A00 )

摘　　要：The steel slag in the decarburization converter is treated by the little water-spreading （ LWS ） and the heat-stewed （ HS ） methods , which is used as the furnace burden of the dephosphorization converter.The slag characteristics by the LWS and the HS methods and its application effects as the furnace burden are researched.The results show the moisture content in the HS slag is higher than that of the LWS slag.There is higher total iron content in the HS and the LWS slags and almost same melting point.The dicalcium silicate content in the LWS slag is higher than that in the HS slag.The tricalcium silicate in the LWS slag is lower than that in the HS slag.There are a lot of calcium ferrite in the LWS and the HS slags , which is beneficial to dephosphorization and slag melting.The LWS and the HS slags are added to dephosphorization converter each charge by 3or 6t.The results show that the saving lime is 0.7-1.0tfor each charge.The petrographic constitute of final slag for the dephosphorization converter by adding the LWS and the HS slags is dicalcium silicate , RO phase and glass phase.There are a little calcium ferrite phase in the LWS slag , which is helpful to dephosphorization.So there are better dephosphorization effects for the LWS and HS slags.The steel slag in the decarburization converter is treated by the little water-spreading （ LWS ） and the heat-stewed （ HS ） methods , which is used as the furnace burden of the dephosphorization converter.The slag characteristics by the LWS and the HS methods and its application effects as the furnace burden are researched.The results show the moisture content in the HS slag is higher than that of the LWS slag.There is higher total iron content in the HS and the LWS slags and almost same melting point.The dicalcium silicate content in the LWS slag is higher than that in the HS slag.The tricalcium silicate in the LWS slag is lower than that in the HS slag.There are a lot of calcium ferrite in the LWS and the HS slags , which is beneficial to dephosphorization and slag melting.The LWS and the HS slags are added to dephosphorization converter each charge by 3or 6t.The results show that the saving lime is 0.7-1.0tfor each charge.The petrographic constitute of final slag for the dephosphorization converter by adding the LWS and the HS slags is dicalcium silicate , RO phase and glass phase.There are a little calcium ferrite phase in the LWS slag , which is helpful to dephosphorization.So there are better dephosphorization effects for the LWS and HS slags.

关 键 词：decarburization converter recycling slag melting characteristics dephosphorization converter smelting effect 

分 类 号：X705[环境科学与工程—环境工程]