1981 Volume 67 Issue 8 Pages 1128-1134
This paper describes the newly developed mold level control system and the ladle valve control system, both of which are greatly contributing to the automatic operation of the continuous casting machine.
(1) New type of mold level control system
The new type of mold level control system employs the non-contact type thermo-sensors instead of the conventional thermocouples to detect the steel level in the mold. The steel level change in the mold is detected by a permeability change of the thermo-sensitive magnetic materials attached to the mold wall; Easy maintenance of the mold is now possible without taking care of the thermo-couples.
(2) Withdrawal speed control system
The flow rate of molten steel through the slide valve of the ladle is calculated and controlled by means of micro-computer taking the withdrawal speed of cast strand as an input. Thus, in comparison with the conventional ladle slide valve control, this system can avoid the load cells on the tundish car, and brings about an advantage on both of the maintenance and the cost.