Maintenance procedures for zinc pot of the hottest

2022-08-02
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Galvanizing line - maintenance regulations for zinc pot

heater maintenance

the tunnel of the sensor is mainly corroded and blocked. The blocking of the tunnel is caused by the accumulation of external substances in the tunnel. This is often caused by refractory materials, thermocouple protection tubes, or metal oxides. The best way to prevent clogging is not to let too much dross float on the metal for a long time

the danger of blockage is to prevent the circulation of metal in the tunnel. In the UK, there is no way to ensure that the code changes can be fully evaluated in terms of building performance or safety, so that the metal in the tunnel is overheated. Overheating often causes corrosion spots

rod tamping process

in harsh operating environment, rod tamping can be used to prevent blockage. The frequency of adoption may be based on experience. It is not allowed to jam before tampering with the rod, but tampering must be used to stop the jam. The oxides in the tunnel are allowed to accumulate and remain until they are exposed to mettin antimony alloy. It burns into refractory material so that it is difficult to remove

if the heater is blocked due to negligence, it is impossible to prevent the blocking operation. A steel rod at right angles can be used to vibrate in the tunnel. Do this when the heater rises to a certain temperature and turn off the power. If the heater is not easy to tamper with, you must first use a small round rod, and then use a large rod until the 1/2 inch to 3 inch rod can pass through

sometimes the accumulation of sensors is above the tunnel. This indicates a rise in reactance. These slag rods are easy to remove when the inductor is cast into a lower thrust journal

corrosion

under high pressure and high temperature, corrosion often occurs on aluminum inductors. In the case of thermal refractory, it is caused by the floating of tunnel metal. The heater shall be used for a longer time under low pressure and low temperature than under high pressure and high temperature

the best operators believe that corrosion occurs all the time. Low humidity casting is used for refractory materials with high density and low porosity. In order to prevent tissue corrosion during startup, drying and preheating are required to obtain the initial hardness

emergency process

1. What about power failure

2. What if there is no water

storage should also be strengthened. In case of an emergency, it was initially considered as safe. We are facing uncertain situations. The first thing to do is to improve safety. The first is personal safety, and the second is equipment. Make sure that the standby power supply is not exposed in the electric cabinet or around the sensor. From automatic control to manual control, so that when the power supply is stored in the electric cabinet, it does not reach high voltage

how to deal with power failure

in case of power failure accident of main power supply, the following measures shall be taken:

the fans (two for each sensor) and water pumps transferred to the emergency power supply system

zinc pot inductors shall be automatically restarted after several evolution stages. If they do not restart, they must restart manually regardless of the control method provided

failure to operate these fans or re-establish water flow will lead to equipment damage

it is very important that the cooling water of the coil of the zinc pot runs all the time and supplies power to the inductor. Failure of circulating water maintenance may lead to equipment damage

in case of power failure, the following two points are emphasized:

1. Ensure the operation of fans and water pumps under the use of standby emergency power supply. If all of these fail to avoid failure; Failed, to supply regular air supply of carbon dioxide

2. If the power supply is cut off for more than 15 minutes, do not let the sensor power supply be fully loaded immediately. Slowly increase the power supply of the inductor to prevent damage or metal penetration into the refractory

what to do if the water supply is cut off

if the water pressure is lost, the power supply of the sensor should be automatically turned off. The failure condition of water can be displayed on the circuit detection panel

loop alarm

provide a typical alarm loop according to the following conditions:

1. The fan motor cooled by the sensor fails

2. Any sensor alarm bell power supply fails

cooling water discharge overtemperature

preventive maintenance table

Daily:

1. Record the readings of each sensor

2. Record the core temperature of each sensor

3. The bottom slag and scum of the zinc pot of the sensor

4. Check the air temperature of the sensor bellows

5. Check the water system pressure

6. Check the leakage of water system

7. Check the accuracy of the zinc pot thermocouple

8. Check the correctness of panel instruments and the use of indicator lights

9. Check the appearance change of the heater and the performance of the equipment

10. Observe and check the sensor

fan motor failure

if the fan motor fails, the alarm will appear, which indicates that there is a problem with the sensor. The power of the faulty sensor will be automatically reduced to a very low power and maintained until the problem is solved

weekly

1. Check the alarm system of the power cabinet

2. Check the fan

3. Perform visual inspection of the sensor, such as the waterway, bolts, the flange from the sensor to the zinc pot, and the core area

4. Check the standby cooling water pump

monthly

1. Lubricate the fan motor bearing

2. Check the alarm circuit

3. Filter equipment of cleaning water system

4. Detect each sensor

5. Clean the external foundation of the zinc pot

6. Perform maintenance of manual power supply cabinet

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