| 摘要 |
PURPOSE:To reduce energy consumption per unit area in removing scale attached to the surface of milled hoop by blasting abrasives having grains of a specific diameter against the hoop to remove a portion of scale and then utilizing a mechanical or fluid force to remove residual scale. CONSTITUTION:Hot milled hoop 1 is sent to a grinding-off chamber 3a provided between rolls 4 and 5, and scales attached to both surfaces of the hoop 1 are simultaneouly removed by abrasives blasted through a blast devices 2a, 2b within about 1,100mm. of blast distance and having grain diameter less than about 0.35mm.. Next, the hoop 1 is sent to the next grinding-off chamber 3b between rolls 6 and 7 to remove again the scale by blast devices 2c, 2d. Thereafter, the hoop 1 is sent to a grinding-off chamber 9 between rolls 8 and 14 to perform descaling with brushes 10, 12 of rotary tools for complete removal of the scale. |
