基于电脉冲技术抑制连铸水口结瘤堵塞的研究

 浇注过程中连铸水口表面存在自生电场,由此所引起的电润湿、电化学反应等界面作用严重影响水口结瘤堵塞。在连铸平台进行了工业试验,研究结果表明无电场处理的水口内腔结瘤物厚度可达10 mm,吐钢孔堵塞严重;电脉冲处理后的水口内腔平滑,吐钢孔无明显结瘤物。电脉冲处理可减弱或消除水口表面自生电场引起的界面作用,从而有效抑制水口结瘤,延长水口使用寿命。

Study on inhibition of clogging of submerged entry nozzle by electric pulse technology

The spontaneous electric field exists on the surface of the submerged entry nozzle during the pouring process,which will cause interface effects such as electrowetting and electrochemical reaction to seriously affect the clogging of the nozzle. Industrial tests were carried out on the continuous casting platform,and the results showed that the thickness of clogging in the inner cavity of the nozzle can reach 10 mm without electric field treatment,and the tapping hole is seriously blocked; After the electric pulse treatment,the inner cavity of the nozzle is smooth,and there are no obvious clogging in the tapping hole. The interface effect caused by the spontaneous electric field on the surface of the nozzle can be weakened or eliminated by electrical pulse treatment so that the clogging of the nozzle is effectively suppressed and the service life of the nozzle is extended.