Based on the fact of long period deep desulfurization treatment in LF,the relationships among top slag constituent in LF,molten steel constituent,stirring ability of blowing argon,molten steel temperature and desulphu...Based on the fact of long period deep desulfurization treatment in LF,the relationships among top slag constituent in LF,molten steel constituent,stirring ability of blowing argon,molten steel temperature and desulphurization rate were analyzed.Through the experiments,the parameters about treatment technology of top slag in LF,the [Als] content in molten steel,slag charge match,molten steel temperature and the argon flow for stirring have been optimized.The desulphurization treatment period in LF can be shortened by 5～8 minutes.The target sulfur content in molten steel can be controlled below 30 ppm within one LF treatment period which is only 36 minutes.The LF treatment period of ultra-low sulfur steel can primarily match with the continuous casting period,multi-heat continuous casting can be ensured.展开更多
在宝钢炼钢厂300 t RH-KTB上进行了超低碳超低硫钢的预熔渣深脱硫试验。试验共12炉,预熔渣加入量为4 kg/t。试验结果表明,在RH平均初始w(S)为42.1×10-6条件下,处理终点平均w(S)达到30×10-6,最低w(S)达到22×10-6,最高脱...在宝钢炼钢厂300 t RH-KTB上进行了超低碳超低硫钢的预熔渣深脱硫试验。试验共12炉,预熔渣加入量为4 kg/t。试验结果表明,在RH平均初始w(S)为42.1×10-6条件下,处理终点平均w(S)达到30×10-6,最低w(S)达到22×10-6,最高脱硫率达到36.6%,平均脱硫率达到28.6%,取得了较好的深脱硫效果。采用预熔渣处理过程钢中w(TO)及w(N)均有所降低。试验炉次钢中最低w(TO)为12×10-6,平均w(TO)为13.3×10-6,最低w(N)为11×10-6,平均w(N)为13.8×10-6。RH终点钢中的夹杂物主要是Al2O3,95.1%的夹杂物小于5μm。展开更多
文摘Based on the fact of long period deep desulfurization treatment in LF,the relationships among top slag constituent in LF,molten steel constituent,stirring ability of blowing argon,molten steel temperature and desulphurization rate were analyzed.Through the experiments,the parameters about treatment technology of top slag in LF,the [Als] content in molten steel,slag charge match,molten steel temperature and the argon flow for stirring have been optimized.The desulphurization treatment period in LF can be shortened by 5～8 minutes.The target sulfur content in molten steel can be controlled below 30 ppm within one LF treatment period which is only 36 minutes.The LF treatment period of ultra-low sulfur steel can primarily match with the continuous casting period,multi-heat continuous casting can be ensured.
文摘在宝钢炼钢厂300 t RH-KTB上进行了超低碳超低硫钢的预熔渣深脱硫试验。试验共12炉,预熔渣加入量为4 kg/t。试验结果表明,在RH平均初始w(S)为42.1×10-6条件下,处理终点平均w(S)达到30×10-6,最低w(S)达到22×10-6,最高脱硫率达到36.6%,平均脱硫率达到28.6%,取得了较好的深脱硫效果。采用预熔渣处理过程钢中w(TO)及w(N)均有所降低。试验炉次钢中最低w(TO)为12×10-6,平均w(TO)为13.3×10-6,最低w(N)为11×10-6,平均w(N)为13.8×10-6。RH终点钢中的夹杂物主要是Al2O3,95.1%的夹杂物小于5μm。
