| 摘要 |
PURPOSE:To analyze rapidly and directly each component contained in a molten metal sample in a production site by using an excited light focusing constitution from just above direction against the molten metal surface and a focusing tube constitution to which an opposing electrode and a focusing lense are provided. CONSTITUTION:The focusing lense 5 and the opposing electrode 8 whose top end 8' is near the lense 6 are fixed at lower end part of the focusing tube 2. Inner part of an emitting chamber 1 is fixed with gaseous Ar and is lowered by an elevator 24, and the gap between the end 8' and a bath surface is held to prescribed distance by a bath surface level sensor 10 and a controller 23 of gap between electrodes. An emitting device 29 is functioned to perform spark discharge between the end 8' and a molten metal 22 surface. The emitted light intensity is measured by a spectral detector 27, spectral beam intensity of each constituent is corrected by a calculator 28, and contained percentage of each constituent contained in the molten metal is obtained. |
