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以水银为介质,通过物理模拟实验考察射流型磁场排布方式对中厚板坯连铸结晶器内流场的控制.采用超声波Doppler测速仪测量有,无磁场下的结晶器内液态金幅流速,研究磁场排布和强度对水口出流,结晶器内流动、液面流动、结晶器窄面模壁的冲刷作用等的影响.实验显示,射流型磁场排布方式使水口出流流速受到比通常磁场排布方式更强的抑制作用,使其在撞击结晶器窄壁前发生分散,可使上环流流速增强,下环流减弱直至消失,直接形成活塞流形式;同时,还改善了弯月面处流动情况.相比于工业生产中的全幅一段电磁制动技术,射流型磁体排布方式的电磁制动在水口出流、液面处流动方面具有更强的制动作用.
Taking mercury as the medium, the flow field of jet-type magnetic field arrangement was controlled by physical simulation experiment.The flow field in the mold with and without magnetic field was measured by ultrasonic Doppler anemometer , The effect of magnetic field arrangement and strength on outflow of nozzle, the flow in mold, the flow of liquid surface and the scouring effect on the narrow wall of mold are studied.The experimental results show that the jet-type magnetic field arrangement makes the outlet velocity Generally, the stronger magnetic field suppression effect makes it disperse in front of the narrow wall of the impingement crystallizer, which can increase the flow rate of the upper annular flow and reduce the lower annular flow until it disappears, forming the piston flow directly. At the same time, the meniscus is also improved Compared with the industrial production of a full section of electromagnetic brake technology, jet-type electromagnetic arrangement of the electromagnetic brake in the outlet flow, liquid flow at the Department has a stronger braking effect.