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在 RH 真空循环脱气法中,为了要在有限的时间内达到良好的脱气效果,掌握钢液循环速度是很重要的。因为合金的加入速度和合理的处理时间要根据该参数来确定。例如,处理无取向硅钢时,需要加入约3吨硅铁,其最大加料速度应为钢液循环速度的2～4%。否则,如果在短时间内加入大量合金,有可能造成真空室内钢水冻结或破坏循环。
In the RH vacuum cycle degassing method, in order to achieve a good degassing effect in a limited time, it is very important to master the circulation speed of the molten steel. Because of the alloy to join the speed and reasonable processing time to be based on this parameter to determine. For example, when handling non-oriented silicon steel, about 3 tons of ferrosilicon need to be added, and the maximum feeding speed should be 2 to 4% of the circulating speed of molten steel. Otherwise, if a large amount of alloy is added in a short time, it is possible to freeze or destroy the molten steel in the vacuum chamber.