SLAG HEIGHT MEASURING DEVICE, SLAG HEIGHT MEASURING METHOD AND PRELIMINARY TREATMENT METHOD OF MOLTEN IRON

摘要

PROBLEM TO BE SOLVED: To provide a slag height measuring device capable of measuring slag height in a refining vessel such as a converter type refining furnace with high accuracy, a slag height measuring method and a preliminary treatment method of molten iron.SOLUTION: There is provided a slag height measuring device 5 for measuring slag height in a refining vessel by using a microwave, the device including: a measuring part 51 for measuring height of a horizontal surface of slag S in the refining vessel (furnace body 2) by transmitting and receiving the microwave and calculating slag height on the basis of results of measurement; a horn type antenna 54b used for receiving the microwave and having opening surfaces in which bottom ends 541b in a vertical direction are obliquely cut off; and a horn type antenna 54a used for transmitting the microwave and having opening surfaces in which bottom ends 541a in a vertical direction are orthogonally cut off.SELECTED DRAWING: Figure 2