| 摘要 |
PURPOSE:To reduce energy consumption required for blasting and to save energy loss due to mutual interference between projecting materials by providing an elongation percentage to a steel strip by stretching and bending it and descaling it by projecting a grinding and cleaning material on it. CONSTITUTION:A steel strip 1 is provided with scale breaking by a scale breaker 3 after passing a roll 2, and is sent to a grinding and cleaning chamber 5a through rolls 4 and 14. The scale breaker 3 provides >=0.4% elongation to the steel strip 1 by stretching and bending, to break the scales. The strip 1 is then descaled in the chamber 5a by projecting a grinding and cleaning material on it from projecting devices 6a, 6b. After passing through the chamber 5a, the strip 1 enters a grinding and cleaning chamber 5b again through rolls 7, 8, and is descaled again by the grinding and cleaning material projected from projecting devices 6c, 6d. Further, after passing rolls 9, 10, and 11, the strip 1 is fed to a pickling bath 13, and is perfectly descaled and then transferred to the next process through a roll 12. |
