为控制薄带双辊连铸结晶器内金属液面的波动，本文提出水口电磁制动设想。通过在水口区域施加稳恒磁场与直流电流，减缓水口金属液对双辊熔池的冲击。文中对熔池液面的波动情况进行了物理模拟。实验观测了有无电磁制动及不同水口浸入深度等条件下，熔池液面的波动情况，并测量了水口金属液冲击力的相对变化。结果显示，随输入电流增大，水口出流动量减小，双辊结晶器内液面波动幅度和频率降低，熔池液面趋于平稳。这表明水口电磁制动可望有效抑制熔池液面波动，为解决薄带双辊连铸结晶器内金属液的布流和流动控制问题，提供一种可选择的方法。
A model for simulating suppression of level fluctuation in mold of twin-roll strip caster with nozzle electromagnetic brake (N-EMBr), which imposed stationary magnetic field and direct current in nozzle, was established. Momentum of metal liquid in nozzle and level fluctuation in twin-roll pool were measured under different conditions, including immerging depth of nozzle, current and magnetic field. The experiment results showed that momentum of liquid metal, amplitude and frequency of fluctuation all were decreased with current increasing. It was found that N-EMBr technique for fluctuation suppression is effective to twin-roll strip casting mold.
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