Tundish stopper is one of the important steel flow regulation components, stoppers are designed to cope with the extreme thermal shock lining when regulating the molten steel flowing into the mould. The head of our stoppers is specially engineered to withstand erosion by molten steel. The slagline is also strong enough to withstand possible chemical corrosion caused by tundish immersion. we apply different mixtures of aluminia or magnesia to the head of our stoppers to enabling them to cast various types of steel.

Tundish stopper is installed in the tundish and cooperates with the built-in immersion nozzle or tundish upper nozzle to control molten steel from the tundish to the crystallizer in the continuous casting process Flow to ensure the stability of the molten steel flow surface in the crystallizer and the stability of the continuous casting process. Due to the non-replaceability of the stopper rod during use, once the stopper rod fails, the steel flow will be out of control or even stop pouring, which will interrupt the continuous casting and cause serious case accidents or huge economic losses.

1. Problems in the use of plug head

The stopper head is the key part of the stopper, and the stopper cooperates with the water inlet to control the flow. Therefore, the stopper needs excellent scouring resistance. The material of the rod head is generally aluminum carbon, magnesium carbon, spinel carbon, zirconium carbon, etc. The carbon content: design is generally much lower than the carbon content of the rod body. The problems of the tundish integral plug rod head during use mainly include serious rod erosion and plug rod turning.

A. The plug and rod head are badly scoured

When the plug rod head is severely eroded, it can be seen that the arc of the rod head has been washed into a concave shape. After the shape of the plug rod head is changed, the coordination with the bowl of the water inlet becomes poor, resulting in unstable flow control or even loss of control Flow effect. The height of the stopper rod is reduced from 1250mm to 1225mm, and the tip of the stopper is washed away by 25mm. The decrease in the height of the stopper rod will cause the stopper rod to fail to control the flow effectively and not close properly when the pouring is stopped.

B. Stopper turning around

The tip of the stopper rod is separated from the rod body. The height of the stopper rod is reduced from 1725mm to 1600mm. The stopper rod therefore cannot control the flow normally, causing continuous casting to stop pouring.

2. Problems in the use of stopper rods

The plug rod body is composed of rod material and slag wire material. The plug rod body needs appropriate strength to keep the plug rod from breaking during use, generally aluminum carbon; the plug rod slag line needs good slag resistance, generally spinel carbon, zirconium carbon, etc. The main problem exists in the use of the bar body, which is pided into the bar body part and the slag line.

Features

Argon injection structure depending on customer specifications.

Ceramic glaze layer to prevent the material oxidation effectively.

Ceramic fiber blanket to prevent heat lost during casting.

High quality AL-C materials having high corrosion and thermal shock resistance.

High quality Zr-based composite to provide high corrosion resistance at the slag line.

Non-graphite based materials to meet the requirements of producing low carbon steel, silicon steel and high purity steel

Good erosion resistance

Anti-erosion performance

Stable flow control during casting

Applications

steel ladle,refining ladle,electric furnace refining ladle，tundish

Physical And Chemical Indicators