JPS5614023A - Preventing method for scatter of dust in reversing type calibered blooming mill - Google Patents

Abstract

PURPOSE:To remove large mount of dust to be generated during the steel ingot is bloomed into the rough shaped billet, and to prevent the scatter of dust, by injecting the mist stream against the dust scattering spot whose position is different between the first half rolling stage for the rolled material and the latter half rolling stage. CONSTITUTION:During the rolling pass as the first half rolling stage for forming the steel ingot 1 into the calibered steel billet 2, the mist stream is injected in the direction approximately inverse to the material's running out direction, against the rolling roll's surface 18 including the running out point 8 of the rolled material 7 from the rolling roll 6 and the surface 9 of the rolled material 7 just after running out of the rolling roll 6. As a result, the scatter of the dust 10 is prevented, and the dust 10 is removed away as the dust including water. On the other hand, during the rolling pass as the latter half rolling stage for forming the calibered steel billet 2 into the final rough shaped steel billet 3, the mist stream is injected against the surface 19 of the rolled material just after running out of the rolling roll 6, and hereby, the migration toward the mainpulator 16 of the dust-including water drop group 14 on the groove 13 of the rolled material 7 is prevented. Then, when the rolled material 7 passes out of the roll 6, above stated dust-including water is dashed down from the tail end in the rolling direction of the rolled material 7, in order to prevent the scatter of the dust 10 and to remove it.