“撇渣”的英语可以翻译为：[机] separation of slag，skim，skimming ...

撇渣过频或操作不当会使浮渣损失很大.Frequent skimming or improper skimming can cause a much higher dross loss.出铁口通向一条或多条装有撇渣器的铁水沟.The tapholes lead to one or more runners with slag skimmers....