How to deal with the alarm of copper mould tube cooling water?
The copper mould tube cooling water alarm system is a guarantee system for the normal use of the crystallizer. It stipulates the minimum water volume and water pressure parameters that the crystallizer meets for pouring. If the cooling water continues to be used after the alarm is triggered, it will cause steel leakage from the casting billet and even burn the crystallizer. Therefore, when the cooling water alarm is triggered in the crystallizer, the pouring of the stream should be interrupted immediately, the casting billet should be quickly pulled out of the crystallizer, and it can be poured again after it is properly handled.
What emergency measures should be taken if the water outlet of the tundish cannot be closed?
In actual production, sometimes the water outlet of the tundish cannot be closed due to loss of control. At this time, the following emergency measures can be taken:
(1) When the tundish water outlet cannot be closed during pouring with a stopper rod, the prepared plugging cone should be used to plug the hole quickly. If this method is ineffective, immediately notify the contractor to insert a large plugging cone above the pouring of the flow to plug the hole above the water outlet.
(2) When pouring with a fixed-size water outlet, if the water outlet of the tundish cannot be closed, it should be quickly placed in the swing trough, and then plugged with a plugging cone. If this method is ineffective, notify the contractor to insert a large plugging cone above the water outlet to plug the hole above the water outlet.
(3) If the above two methods fail, the water outlet of the tundish should be quickly closed, the tundish car should be moved away from the pouring position, and the entire machine should be stopped.
(4) When the water outlet cannot be closed, it should be noted that the secondary cooling water should be turned off after plugging the hole, and the billet should be pulled out at the original pulling speed.
How to resume steel drawing after pulling out?
The prerequisite for resuming steel drawing after pulling out is to quickly handle the frozen billet in the crystallizer. Therefore, after pulling out, the crystallizer should continue to vibrate, and drip a proper amount of crystallizer lubricating oil on the four walls of the crystallizer to quickly remove the frozen billet in the crystallizer.
After the frozen billet is processed, check that there is no problem with the inner wall of the product mold and the second cold chamber equipment, and then the ingot can be sent for the second time to start pouring.
How to prevent the collapse of the tundish during steel drawing?
The key to preventing the collapse of the tundish is to pay attention to the following points:
(1) During the baking process of the insulation board, follow the heating sequence of first turning on a small fire and then turning on a large fire, and avoid rapid baking;
(2) The baking process of the tundish insulation board cannot be interrupted, and it cannot be baked for a long time during the steel waiting process;
(3) The tundish maintains a suitable pouring temperature, and the wave surface of the tundish remains stable;
(4) Strictly control the pouring time of a single ladle according to the life of the tundish insulation board.
How to prevent the copper mould tube seal from leaking?
According to actual production, the following methods can be used to prevent the crystallizer seal from leaking:
(1) When the steel pourer is operating, the crystallizer liquid level cannot be controlled too high;
(2) Strengthen the management of the crystallizer and replace the seal regularly
What should be paid attention to when dealing with frozen copper mould tubes?
The most important point when dealing with frozen crystallizers is to avoid damage to the copper tube of the crystallizer. Therefore, when dealing with frozen crystallizers, the residual steel at the upper and lower ports of the crystallizer should be cleaned first, and then the frozen crystallizer should be ejected from the bottom to the top with special tools. Do not handle it from the top to the bottom to avoid damaging the taper of the copper tube.
How to quickly deal with frozen crystallizers from the secondary cooling to the straightening machine?
When dealing with frozen crystallizers from the secondary cooling straightening machine, first cut off the lower port of the crystallizer with gas cutting, lift out the crystallizer, cut off the billet between the secondary cooling and the straightening machine, and then slowly lift the billet out of the crystallizer mouth with a crane.
What should I do if the straightening machine or other equipment temporarily fails?
When the straightening machine or other equipment temporarily fails, follow the steps below:
(1) Swing into the swing trough or close the water inlet, and the pulling speed returns to zero;
(2) Turn off the secondary cooling water;
(3) Depending on the fault handling time (within 5 minutes), resume pouring or (more than 5 minutes) pull out the ingot.
