B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
B22D11/16—Controlling or regulating processes or operations
B22D11/20—Controlling or regulating processes or operations for removing cast stock
B22D11/201—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level
B22D11/206—Controlling or regulating processes or operations for removing cast stock responsive to molten metal level or slag level by using X-rays or nuclear radiation