A. Emergency plan for water cut
The induction melting furnace suddenly stops water, and the circulating water pressure gauge of the melting furnace sends a signal to automatically cut off the intermediate frequency power supply and send out an alarm signal. The workers in front of the furnace should take the following emergency measures:
1. Cut off the main circuit according to the power-off sequence of the melting furnace (to prevent the intermediate frequency power supply from restarting when the water pressure suddenly returns to normal, and the intermediate frequency current impacting the thyristor). To
2. Close the main water inlet valve of the cooling water system first, and then open the standby fire-fighting water valve to ensure that the coil cooling water supply pressure is 0.1-0.16Mpa. 3. Cover the furnace mouth with asbestos cloth and do a good job of heat preservation. To
4. The monitor on duty is responsible for notifying the dispatcher and workshop director in time. The monitor can find out the reason and restart the induction melting furnace according to the operating procedures after the normal water supply is restored. To
B. Emergency plan for power outage
Emergency measures for sudden power failure of induction melting furnace:
1. Check whether the cooling water of the coil is normal. If it is abnormal, deal with it according to the emergency plan for water cut to ensure that the cooling water is normal. To
2. Inform the dispatcher, the workshop director, and the monitor to understand the reason and time of the power outage, and then take the following measures:
①Within 4 hours of power failure, cover the furnace mouth with asbestos cloth, do a good job of heat preservation, and use 200KW of power to melt after returning to normal. To
②If the power is cut for more than 4 hours, in order to avoid the molten iron in the furnace from solidifying and damaging the furnace lining, all the molten iron should be poured out, and the asbestos cloth should be used for heat preservation. Only after the fault is eliminated, can the material be added and the furnace should be restarted. To
③If the control power supply is also out of power and the molten iron cannot be poured out, heat preservation work should be done until the normal power is supplied according to the operating rules, and the temperature is raised with 100KW power to make the furnace temperature above 900℃, and then use 200KW power, slowly Melt the molten iron (to prevent the molten iron from cracking the furnace lining when melting with high power). To
④Observe the change of the furnace lining after the production of molten iron in this furnace. If the furnace lining has a large worn surface, stop using it and repair or dismantle the furnace lining. To
⑤For melting furnaces that have experienced power outages, the furnace front workers should strengthen monitoring. First, they must manually test whether the alarm system is normal, and compare the alarm coefficient with that before the accident. When the alarm coefficient has increased significantly, the furnace can be replaced. Production. To
C. Emergency plan for power outages and water outages
When the induction melting furnace has a power outage or water outage, the principle of first ensuring that the coil cooling water is normal, and then treating the molten iron. To
1. Follow the emergency plan for water cut to ensure that the coil cooling water is normal. 2. Dispose of molten iron according to the emergency plan for power outages. To
D. Emergency plan for furnace leakage
Emergency measures for leakage of induction melting furnace:
1. When the leaking furnace alarm sends out a signal to confirm the leaking accident, emergency measures when the molten iron does not leak out:
① Cut off the main power supply (at the same time, the class leader informs the dispatcher, workshop director, and class leader). To
②Pour molten iron into the emergency bunker in time. To
③Keep the coil cooling water unblocked. To
2. Emergency measures when a furnace leakage accident occurs and a water shutdown accident occurs at the same time:
① Cut off the main power supply (at the same time, the class leader informs the dispatcher, workshop director, and class leader). To
② Pour molten iron into the emergency bunker. To
③According to the emergency plan for water cut, use the standby water to ensure that the coil is supplied with cooling water. To
④The production team assists in blowing the furnace with air ducts to reduce the furnace temperature as soon as possible. To
3. Emergency measures for water leakage in the coil when a furnace leakage accident occurs:
① Cut off the main power supply (at the same time, the class leader informs the dispatcher, workshop director, and class leader). To
②Close the circulating water inlet valve to prevent molten iron from leaking out and exploding when exposed to water. To
③Pour molten iron into the emergency bunker. To
④The production team assisted in blowing the furnace with air ducts to reduce the furnace temperature, and arranged for personnel to use fire extinguishers to extinguish the open flame at the bottom of the furnace. To
⑤ Recirculate water, cool the coil, and place a bucket to catch the water at the coil's water seepage position.
