CONTINUOUS CASTING MACHINE FOR EXTRA THICK SLAB AND METHOD FOR PRODUCING EXTRA THICK SLAB

摘要

A continuous casting machine for an extra thick slab comprises a vertical guide section (6) and a sector section (8). A narrow support roll (a2) is disposed in the vertical guide section. A spraying device is disposed in the sector section. The spraying device can swing, to avoid a fissure generated by the fact that the corner of the slab is too cold when the width is changed. A method for producing an extra thick slab comprises: disposing a narrow support roll in a vertical guide section; and when the slab enters a sector section and a straightening sector section (9), a spraying device avoiding spraying cooling water and compressed air to the corner of the slab. In the continuous casting machine for an extra thick slab and the method for producing a slab by using the continuous casting machine for an extra thick slab, a wide support roll and the narrow support roll are disposed in the vertical guide section, and a rotatable nozzle and a swinging device thereof are disposed in the sector section and the straightening sector section, so as to avoid a fissure caused by the bulge phenomenon of a narrow edge of the slab, thereby avoiding a fissure generated by the fact that the corner of the slab is too cold during cooling as the width of the slab is changed, and greatly improving the quality of the slab.