Discussion on sulphide capacity and sulphur distribution ratio of slag for ultra- low carbon weak deoxidized steel
XIE Dan1，CHEN Gu- jun2，HE Sheng- ping2
（1. Planning and Operation Department， MCC Capital Engineering and Research Incorporation Limited， Beijing 100176， China 2. School of Materials Science and Engineering， Chongqing University， Chongqing 400044， China）
Abstract：The calculation models of the sulphide capacity were sketched firstly，which mainly includes the optical basicity model，KTH model，etc. At the same time，the FactSage software was proposed to calculate the slag sulphide capacity and compared with the former two methods. The results indicated that these three models can predict the sulphide capacity of the RH top slag reasonably. Then，the sulphur distribution ratio between the ultra- low carbon steel and slag was calculated by the FactSage software，and the calculation result was similar to the measurement result. Thus，the FactSage can be used to predict the sulphide capacity of the RH top slag for ultra- low carbon weak deoxidized steel and the slag- steel sulphur distribution，as well as guide the production practice. Finally，for the production of ultra- low carbon weak deoxidized steel，the ［S］ mass fraction can be controlled within normal lower range by increasing the w(CaO)/w(Al2O3) and decreasing the mass fraction of (FeO+MnO) and SiO2 in RH slag.
解丹，陈固军，何生平. 超低碳弱脱氧钢炉渣硫容量和硫分配比探讨[J]. 中国冶金, 2017, 27(9): 20-24.
XIE Dan，CHEN Gu- jun，HE Sheng- ping. Discussion on sulphide capacity and sulphur distribution ratio of slag for ultra- low carbon weak deoxidized steel. China Metallurgy, 2017, 27(9): 20-24.
2017, Vol. 27 
