DETECTION OF WATER LEAKAGE OF OXYGEN BLOWING LANCE

摘要

PURPOSE:To detect quickly and exactly the water leakage of an oxygen blowing lance having a water cooling construction from the change of the dew point of the waste gas of a refining furnace using said lance and to permit taking of required remedy by measuring continuously the above-mentioned dew point. CONSTITUTION:The waste gas of the refining furnace 5 which executs refining of a molten iron by inserting the oxygen blowing lance 10 having the water cooling construction into the furnace and blowing oxygen into the molten iron is sucked through a duct by an exhauster 16 and is treated by a waste gas treatment device not shown. The treated gas is released into the atmosphere. A piping 17 is connected to the duct 15 and part of the waste gas is sucked by a pump 18 and is sent to a dew-point instrument sensor 19. The dew point of the waste gas is continuously measured and the detection signal thereof is processed by a signal converter 20. The detected dew point is recorded in a recorder 21. An alarm is emitted by a dew point monitor meter 22 to announce the generation of water leakage from the above-mentioned lance 10 when the abrupt increase in the dew point is shown.