METHOD FOR DETECTING MOLTEN METAL SURFACE LEVEL IN METAL STRIP CONTINUOUS CASTING

• Main Authors: ONO KOICHI, TOYAMA NAOTO, SASAKI TSUNEO
• Format: Patent
• Language: English
• Published: 02.05.1990
• Subjects: CASTING; CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING

PURPOSE:To improve the quality of a metal strip by correcting the detected value of molten metal surface level measured with an eddy current sensor and executing casting while accurately grasping molten metal surface level. CONSTITUTION:At the time of pouring the molten metal into pouring basin part 2, the molten metal surface 7 is risen and brought into contact with electrodes 5a, 5b for detection and electric current is conducted between the electrodes 5a and 5b and it is detected that the molten metal surface 7 exists at lower end position of the detecting electrode 5b. This detected value is inputted into a control mechanism 8 to correct the detected value related to the molten metal surface level from the eddy current sensor 6. Further, the pouring is continued and when the molten metal surface 7 is brought into contact with lower end of a detecting electrode 5c, the electric current is conducted between the electrodes 5a and 5c for detection and it is known that the molten metal surface 7 exists at lower end position of the detecting electrode 5c, and this detected value, too, is corrected with the eddy current sensor 6. By taking the detected value of the conductive electrode type sensor 5 into the eddy current sensor 6 as the corrected input, while rejecting circumferential influence to the eddy current sensor 6, the measurement of the molten metal surface level is executed at high accuracy.