AOD炉渣熔化温度的实验研究

利用炉渣半球点测定法，测定了宝钢不锈钢分公司炼钢厂AOD炉（120 t）氧化期渣和终渣的熔化温度，研究了AOD炉渣熔点的影响因素。结果表明，对于AOD氧化期渣，碱度和氧化镁对炉渣熔点影响不大；渣中w(TFe)在97%～20%之间变化时，增加渣中全铁可使炉渣熔点明显升高；渣中w(Cr2O3)从225%增加到30%，可使炉渣熔点升高140 ℃。对于AOD终点脱硫渣，当R＝14～18时，炉渣熔点随碱度的增大而显著升高；脱硫渣R＝18时，w(CaF2)加入12%～13%则炉渣熔点显著降低；AOD还原渣R＝16时，w(CaF2)加入95%～10.5%可显著降低炉渣熔点。

Study on Melting Temperature of AOD Slag

Melting temperature of oxidation period slag and reducing slag as well as desulphurizing slag in 120 ton AOD of Baosteel Stainless Steel Branch was investigated by means of the method of half spheroidal point temperature. The influence factors of AOD slag melting point were studied. The results show that for the AOD slag in oxidation period, the influence of basicity and MgO on slag melting point is little. The slag melting point increases with the increase of TFe in oxidation slag as TFe content range from 10% to 20%, and in addition, the slag melting point increases 140 ℃ with Cr2O3 content in the slag increases from 225% to 30%. For the final desulphurizing slag, the slag melting point increases remarkably as the slag basicity changed from 1.4 to 1.8. The slag melting point decreases observably in the range of CaF2 addition 12%~13% for desulphurizing slag of basicity 18, and in the range of CaF2 addition 95%~105% for reduction slag of basicity 1.6.