风淬工艺对粒化不锈钢氩氧脱碳炉渣的影响

为了改善不锈钢氩氧脱碳炉渣的稳定性,采用风淬法对不锈钢氩氧脱碳炉渣进行粒化试验,研究了炉渣碱度、改质剂、温度、风速和喷吹角度对其粒化效果的影响规律。结果表明,渣粒平均粒径随着碱度的降低先减小后逐渐增大,碱度为1.8时平均粒径达到最小值4.31 mm;添加氧化硼改质后,粒化渣平均粒径随着碱度的降低与改质前变化趋势相同,但整体减小;随着熔渣温度升高,粒化渣粒平均粒径增大;随着风速增大和喷吹角度减小,粒化渣粒平均粒径逐渐减小,在21.5 m/s风速下得到最小粒径3.67 mm,当喷吹角度为25°时达到最小粒径4.28 mm。

Effect of air quenching process on granulation of AOD stainless steel slag

To improve the stability of stainless steel argon oxygen decarburization(AOD) slag, the AOD slag was granulated by air quenching, and the influences of slag basicity, modifier, slag temperature, flow velocity, and injection angle on the slag granulation result were studied. The results showed that with the slag basicity decreasing, the mean diameter firstly decreased to the minimum mean diameter of 4.31 mm at the basicity of 1.8 and then gradually increased. After the adjunction of B₂O₃, with the decrease of basicity the change trend of the mean diameter of the slag was the same with before modification, but the mean diameter overall decreased. With the temperature of the slag increasing, the mean diameter of the slag increased. With the flow velocity increasing and the injection angle decreasing, the mean diameter of the slag gradually decreased to the minimum mean diameter of 3.67 mm at the flow velocity of 21.5 m/s; the minimum mean diameter of the slag of 4.28 mm was obtained at the injection angle of 25°.