·Available online at ; ScienceDirect JOURNAL OF IRON AND STEEL RESEARCH INTERNPJIONAL 2009 16 3 06 14 " Double Slag Operation Dephosphorization in BOF for Producing Low Phosphorus Steel TIAN Zhi hong LI Ben hai ZHANG Xiao rning JIANG Zhong hang Shougang Research Institute of Technology
The UNE 36001 norm includes the following classification of steel products Irons steels foundry or pig iron ferro alloys ferrous aggregates and special ferric worth highlighting is steel a very versatile material that accounts for 80% of metal production and which is obtained by mixing Iron Fe and Carbon C The carbon content in steel does not exceed % whilst
·A few existing steel slag reduction dephosphorization methods mostly use fossil fuels such as pulverized coal and coke powder as reducing agents which not only consume non renewable energy but also cause significant carbon emissions and increase environmental pressures Diao et al 2016; Lin et al 2014; Ryu et al 1999; Tian et al 2012
·A literary study has been made to find parameters affecting dephosphorization of stainless steel Ways During the melting process lime CaO and dolomite CaMg CO 3 2 is added CaF 2 is also added in order to increase the solubility of the slag When the process is finished and it is
metal After blowing lime dolomite and iron ore were added into the converter to form a suitable slag The dephosphorization rate of molten steel gradually decreases with the increase in tapping temperature The reason for this will be discussed in Section Effect of slag phase on dephosphorization
·The results of dephosphorization experiments indicate that there is a sharp drop in phosphorus content in hot metal at the initial stage of dephosphorization It was found that the optimal proportion of steel slag in dephosphorization agent is 20% The heat enthalpy of unit mass slag and are 1164 kJ/kg and 1131 kJ/kg respectively
·In secondary route of steelmaking production through induction melting furnace contributes about 31 % of India s total steel production The main raw materials used are steel scrap cast iron and sponge iron In India majority of the induction furnaces are operated using acidic lining of silica based ramming mass to produce structural steel where basicity cannot be
·Meanwhile CaO could absorb [P] to form Ca 3 PO 4 2 on the surface of calcined dolomite particles which was beneficial for dephosphorization of molten steel ： MgO CaO
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