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    中频炉穿炉前有哪些症状？ 1、观察炉膛内壁的厚度分布，大概了解会穿孔的部位。 2、每炉铁水倒出后，观察内壁有无黑痕。 3. 使用前在黑色斑点区域涂上沙片。 4. 为安全起见，如果您不确定，请停止使用中频炉。 What are the symptoms before the intermediate frequency furnace is worn? 1. Observe the thickness distribution of the inner wall of the furnace, and probably understand the part that will be perforated. 2. After pouring out each furnace of molten iron, observe whether there are any black marks on the inner wall. 3. Apply sand patch to the black spotted area before using it. 4. For safety, stop using the intermediate frequency furnace if you are not sure. https://songdaokeji.cn/category/products/induction-melting-furnace firstfurnace@gmil.com https://songdaokeji.cn/category/blog/induction-melting-furnace-related-information firstfurnace@gmil.com