| 摘要 |
PURPOSE: A drainage device of a rolling mill is provided to prevent a drainage way from being worn due to foreign substances such as scale. CONSTITUTION: A drainage device of a rolling mill comprises a first drainage way(210), a filtering part(230), and a second drainage way(250). The first drainage way is connected to the lower side of the rolling mill which drains waste water and is formed with a first inclined angle. The second drainage way guides the drained waste water to a water treatment tub. The second drainage way is formed with a second inclined angle which is gentler than the first inclined angle. The filtering part is installed in between the first and second drainage ways to filter scale contained in the waste water.
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