1. The problem occurred in the use of the tundish stopper header
The tundish stopper header is the key part of the tundish stopper stick. The stick head and Shangshuikou cooperate to control the flow control. Therefore, the stick head needs excellent brushing. The material of the rod is generally aluminum carbon, magnesium carbon, spine -spike carbon, carbon carbon, etc. The carbon content design is generally relatively lower than the carbon content of the stick body. The problems that occur in the integrated tundish stopper header in the middle bag are mainly the two aspects of the rod headwing and the jumping of the stick.
A. The stub head is severely scrubbed
When the stub head is severely scrued, you can see that the arc shape of the rod head has been washed into a depression shape. After the shape of the tundish stopper header changes, the coordination of the bowl of the bowl of the Shangshuikou bowl has deteriorated. Streaming. The height of the tundish stopper stick is reduced from 1250mm to 1225mm, and the rod head is flushed by 25mm. The decrease in the height of the tundish stopper stick will cause the plug stick to be unable to control the flow and unable to close it normally when it is stopped.
B. The tundish stopper stick turned around
The tundish stopper stick head is separated from the stick body. The height of the tundish stopper stick is reduced from 1725mm to 1600mm, and the head head is 125mm. As a result, the plug stick cannot be controlled normally, resulting in linked casting.
2. The problem that occurs in the use of the stick body
The stick body is composed of the stick body material and the slag line material. The tundish stopper stick body needs to be proper strength, keeping the tundish stopper sticks continuously cracking during use, generally aluminum carbon quality; the plug rod slag line requires good slag corrosion, generally spinel carbon, carbon carbon quality, etc. The main problem of horizontal section in the use of the stick is divided into the horizontal section of the stick and the horizontal section of the slag line.
When the body of the stick of the overall plugged stick appears horizontally when the wall thickness of the stick is plugged in the steel pouring process, it usually occurs in the middle of the tundish stopper stick.
3. Problems that occur in the use of tundish stopper stick connectors
There are several methods such as metal filament, carbon or ceramic filament, and sales holes. Among them, metal wire blocking is the most widely used. At present, the m39 is M39 metal filament. The tundish stopper -in connector plays an important role in the process of lincing. The common problems in the plug -in connector are melted and the tail of the tundish stopper stick is cracked.
