How to quickly replace tundish nozzle

Would you like to know how to quickly replace tundish nozzle. By reading this article, learn how to quickly replace tundish nozzle. What’s more, you can know more kinds of refractory nozzle and other refractory products.

Quickly replace tundish nozzle method

1. Hydraulic quick replacement method:

The nozzle in use and the spare nozzle are placed front and back on the same plane, supported by high temperature resistant springs, and the nozzle is replaced by hydraulic ejection;

The rapid replacement of the sizing nozzle adopts a specific mechanical device. There is a running slideway with accurate dimensions in the device. The sizing nozzle and the spare sizing nozzle in the working state are positioned in the slideway.

When the sizing nozzle needs to be replaced, press the start button, and the hydraulic drive device will push the standby nozzle to slide from the standby position to the working position within 0.1s, and the original working nozzle will be pushed out to the collection position;

The molten steel is injected into the crystallizer through the new lower nozzle, so as to realize the rapid replacement of the sizing nozzle during the continuous casting process. After replacement, the center line deviation of the upper and lower nozzles is less than 0.1mm.

2.Manual quick replacement method:

The nozzle in use and the spare nozzle are fan-shaped on the same plane, fixed mechanically, and replaced manually. The manual replacement mechanism is simple, and it is divided into four parts: the base, the fixed plate, the sector plate, and the spring pressure regulator.

There are two sizing nozzles in the fan-shaped slide frame, moving the handle of the fan-shaped frame can make the casting hole of one of the nozzles on the fan-shaped slide frame in working condition, while the other nozzle has been moved to the other side of the device. Replace the removed nozzle.

Tundish nozzle manufacturing method

The tundish nozzle manufacturing method provided by the invention comprises the following steps:
(1) manufacturing zirconia cores, wherein the density of the manufactured zirconia cores is 5.58 to 5.62g/cm<3>, the apparent porosity is smaller than 3.8 percent, and the outer diameter is A;

(2) manufacturing prestressing rings, wherein the inner diameter of the manufactured prestressing rings is 0.008A to 0.01A smaller than the outer diameter of the zirconia cores;

(3) sleeving the rings, i.e. after heating a plurality of prestressing rings to the temperature of 700+/-10 DEG C, sleeving the prestressing rings on the zirconia cores, wherein the two ends of the zirconia cores must be provided with the prestressing rings, and naturally cooling to form the zirconia cores on which the prestressing rings are sleeved;

(4) integrally molding, i.e. sleeving the zirconia cores on which the prestressing rings are sleeved in a nozzle molding die, pouring a pre-mixed nozzle shell material into the molding die, pressing to mold, and finally, de-molding to obtain the tundish nozzle.

If you want to know what causes tundish nozzle clogging and prevention of nozzle clogging, welcome to view.

Tundish Nozzle
Tundish Nozzle

More details about Tundish Nozzle FAQ

What is the function of a tundish?

A tundish is installed to prevent cross-contamination between an overflow pipe and a drain pipe. Unsanitary water from the drain pipe could theoretically enter the system if a tundish is not installed to block this.

What are the different types of tundish nozzles?

Tundish Nozzle
Rotary Nozzle.
Fog Nozzle.
Full Cone Nozzle.
Hollow Cone Nozzles.
Industrial Spray Nozzle.
Collector Nozzle.
Coal Nozzle.
High Pressure Nozzles.

What are tundish nozzles made of?

Tundish Nozzles usually comprise a zirconia inner nozzle (often referred to as a “zirconia insert”) with a lower grade outer body such as Alumina, Zircon or Bauxite.

tundish furnace
Tundish Furnace

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