The methods for judging lining life are as follows:
(1) Calculate the lining life based on past experience, pay attention to
observe the frequency meter, voltmeter, ammeter and so on when the
lining life is fast. If the needles of these meters oscillate
continuously under normal working conditions, the lining life will not
continue to use after the end of this work.
（2）操作工用铁棍正常扒渣接触铁液有触电感时，注意观察电炉工作声音，如果声音 “发闷”甚至出铁液时声音变化明显，说明白钢雕塑 小型滚揉机 防火电缆 托辊设备 水刀切割机 铜钟 石雕狮子 校园不锈钢雕塑 扭王块模具
(2) When the operator normally picks up slag and contacts with molten
iron with a contact inductance, pay attention to observe the working
sound of the electric furnace. If the sound is "stuffy" or even changes
obviously when the molten iron is discharged, it indicates that the
molten iron has intruded into the lining or even broken through the
lining. The molten iron in the furnace should be treated according to
the situation and no longer be used.
(3) The working sound of the circuit obviously becomes "stuffy". When
the enclosure of the circuit contacts with other grounding bodies and
the power supply stops working, it indicates that the molten iron has
broken through the lining of the furnace. The power supply should be cut
off immediately and the molten iron in the furnace should be poured out
to stop using.