PURPOSE: To enable the production of a cast slab excellent in surface characteristic by controlling electromagnetic coils for controlling flow velocity at a meniscus in a mold to a specific value of the flowing speed with the specific value of the frequency.
CONSTITUTION: The electromagnetic coils 7-1, 7-2 for electromagnetic-stirring molten steel discharged from an immersion nozzle 2 inserted into the continuous casting mold 1 are provided. By making the stirring pattern for which the electromagnetic coil center directs to short side from a mold center selectable, the magnetic field impressing direction of each electromagnetic coil can independently be controlled. A control system is connected with the electromagnetic coil so that the flow velocity of the molten steel at the meniscus becomes 10-60 cm/sec by impressing a mobile magnetic field having 50-40000 coil pitch L (mm) ×magnetic field frequency (f) (herz).
TSUTSUMI KAZUHIKO
FUKUDA ATSUSHI
| JPS6316840A | 1988-01-23 | |||
| JPS5775268A | 1982-05-11 | |||
| JPH01228645A | 1989-09-12 | |||
| JPS61115654A | 1986-06-03 | |||
| JPS5939454A | 1984-03-03 | |||
| JPS60137558A | 1985-07-22 | |||
| JPS63104763A | 1988-05-10 | |||
| JPS642771A | 1989-01-06 | |||
| JPH02258152A | 1990-10-18 | |||
| JPS5775270A | 1982-05-11 | |||
| JPS6328702A | 1988-02-06 | |||
| JPS6152969A | 1986-03-15 |