The accident of the Smelting furnace is difficult to predict,In face of very sudden accident happened,we should be
calm and adopt the correct treatment which can avoid the accident .
First, power outage accident
Due to power outages, the supply of water tin the coil stopped, the heat from the iron liquid is very large,If the lackage
of the water for longtime , the water in the coil can become steam and do harm to coil cooling, Insulation and coil connected
with the rubber tube and the coil will be burned,Therefore, when the power outage, the sensor can be turned to industrial
water or the start of a gasoline engine water pump,Because the furnace is in a power outage, so the coil water content is one
third compare with the furnace working condition, The outage time within one hour, using charcoal to cover the iron level, prevent
heat, wait to power to come again. Generally speaking, do not have to swing other measures, the temperature drop is also very
limited.A 6 toncapacity induction furnace, power outage one hour, the temperature dropped only 50. for the small capacity melting
furnace ,the outage time lasts for more than one hours, the iron liquid maybe solidified, So it is better when iron is still liquid ,
turn the pump power supply switch to the standby power supply, or use standby pump to get out iron liquid by hand. But for various
reasons, temporarily can't pour out the hot metal liquid , you can add some ferrosilicon postponed its solidification speed .If
liquid iron already solidified, should try to damage the surface crust layer,dig a hole to the inside, to prevent gas explosion accident
caused by thermal expansion during the second melting. If power failure time need more than one day , there will be entirely
solidification liquid iron, temperature also declined, even though the energizing melt, may not be electrified .Estimates as soon as
possible, to determine a time of power outage in more than a day, try to get out the metal liquid as soon as possible.
Second, melting furnace iron liquid leakage
If Iron liquid leakage accident cause, easily casued equipment damage, even endangers worker’s safety,
so try to make the stove maintenance work in daily life.
When the leakage alarm bell rang, immediately cut off the power supply, the inspector lining around,
check if the iron liquid leakage,If leakage, immediately tilting the furnace, emptied the molten iron . If there is no leak,
checks in accordance with procedures for
examination and treatment.I f it is confirmed leaking liquid iron from the lining cause the alarm, we should pour molten iron ,
repair the lining, or reramming,Drain liquid iron is due to the destruction caused by the lining,The thinner thickness of the
crucible furnace is ,the higher electrical efficiency will ne . But if the wear lining thickness less than 65 mm,Throughout
the lining thickness are almost junction layers and buffer layers, there is no loose layer, lining will be slightly affected
and produce small cracks, The cracks will be able to crack through the entire interior of the furnace, molten iron is easy to leak.
Third，Water cooling tower accident
Usually the cooling water temperature is too high due to the following reasons: 1.Sensor
Cooling water pipes blockage 2. water flow decreases.At this moment need power outage,
use compressed air to blow pipes to remove foreign bodies,And the time stop the pump
Had better not more than 15 minutes, Another reason is that the coil cooling water channel
have scale, according to the cooling water quality situation, must put every use the hydrochloric
acid to pickling coil waterway 2 times each year. Melting furnace sensor conduit suddenly is leaking,
Leaking reason is that sensors around the magnetic yoke, or fixed bracket affected by the insulation
breakdown, When found the accident immediately cut off the power, using epoxy resin or other insulating
rubber seal the surface of leaks, Pour out the metel liquid ,and then repair the oven. If coil water pipe
is breakdown in large area, can't use epoxy resin to stop the leakage, it had to stop the furnace, pouring
the liquid iron, and repair.
2016-04-26
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