What are the difference between tundish nozzles and ladle nozzles in steel making

This article explains the difference between ladle nozzle and tundish nozzle. Learn about the difference between ladle furnace andtundish furnace. Welcome to know more about refractory nozzle and other kinds of refractory products.

The different between tundish nozzles and ladle nozzles

Tundish nozzle and ladle nozzle are important components in the process of steelmaking, but they serve different purposes.  Tundish is used in the continuous casting process to distribute molten steel into the mold, while the ladle is used for transporting and pouring molten steel from the furnace to the tundish.

Refractory nozzles including a so-called long nozzle, an upper nozzle, a lower nozzle, and an immersion nozzle made from high-alumina refractory material, graphite powder, silica powder and other minor constitutents wherein a major part of the high-alumina refractory material.

This article relates to nozzles used around the ladle and the tundish in a steel manufacturing plant and made from specially processed refractories, and more particularly, it relates to those used in so-called continuous casting.

Tundish Nozzle Composition

Tundish Nozzles are an integral part of Continuous Steel Casting process. These products are instrumental in controlling the flow of Molten Steel from Tundish to Continuous Casting. Long casting sequence time. Controlled casting speed. 

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.

Ladle Nozzle Composition

Ladle-nozzle – a type of refractory products used in the process of non-stop casting of steel. They are part of the components of refractories to a steel casting slide gate. They are an integral replaceable part of the nest block.

Ladle nozzle is composed of upper and lower sliding plates and 4 refractory bricks for the upper and lower nozzles. The pouring of each ladle of molten steel must pass through the upper and lower sliding plates and the upper and lower nozzles, so they are very strict.

Tundish Nozzles are an integral part of Continuous Steel Casting process. These products are instrumental in controlling the flow of Molten Steel from Tundish to Continuous Casting. These are highly suitable for open casting.

Tundish Nozzle & Ladle Nozzle

What is the difference between tundish and ladle?

(1) The tundish nozzle is smaller than the ladle nozzle and is easy to be blocked by cooling. 

(2) The height of molten steel in the tundish is used to adjust and control the flow of molten steel in the tundish into the mold.

(3) The tundish allows a reservoir of metal to feed the casting machine while ladles are switched, thus acting as a buffer of hot metal, as well as smoothing out flow, regulating metal feed to the moulds and cleaning the metal.

What is Ladle furnace?

In steel: The ladle. An open-topped cylindrical container made of heavy steel plates and lined with refractory, the ladle is used for holding and transporting liquid steel.

The main purpose of the Ladle is to raise steel temperature and to control the chemical composition between tapping and casting, removing and/or modifying inclusions and acting as a buffer in melt shop logistics.

In the process of steelmaking, once the steel is made in the basic oxygen furnace, arc furnace or induction furnace, it is transferred into the ladle for further refining, chemistry adjustment, inclusion modifications, etc.All these treatments are carried out in the ladle. Additional heat is required to carry out these operations. Hence the ladle is provided with a heat source which heats the liquid metal and compensates thermal losses. Thus the furnace in which the quality of liquid steel is improved by refining and heating is called a ladle refining furnace (LRF). Our offer consists of a wide range of safe and reliable refractories ranging from slide gate to nozzle to nozzle changers and purging plug systems.

What is Tundish Furnace?

The tundish is a container of large dimensions that receives the steel from the ladle prior to its introduction into the continuous casting machine.

Tundish are highly responsible facilities within the casting process of molten steel, because they are subjected to high temperatures continuously and failure of them involves not only the production sequence, but also the safety of the plant.

The tundish is made from extremely durable materials which are capable of coping with the high heat of molten metals. The equipment is usually lined with a material with low conductivity, and may be fitted with a nozzle to control the flow of molten metal. In other designs, the pour is controlled by hand or by machine. Controlling the pour is important to avoid casting a piece with flaws such as cracks and bubbles, and to accommodate the needs of different metals.

More details about Ladle Nozzle & Tundish Nozzle

Which is the connector pipe between tundish and steel ladle?

In steel making, the shroud tube creates a connection between the ladle and tundish of the continuous casting plant allowing molten metal to flow between the two.

What is nozzle and diffuser?

A nozzle is a device which accelerates fluid. During this process, velocity of fluid increases with decreasing pressure. A diffuser is a device which slows down fluid. That means velocity of fluid decreases with increasing pressure.

What are the different types of tundish nozzles?

Different kind of tundish nozzles include, Alumina, Alumina Carbon, Zirconia Alumina Nozzles, which are manufactured for single to multiple casting application.

What is a tundish nozzle used for?

Tundish Nozzles are an integral part of Continuous Steel Casting process. These products are instrumental in controlling the flow of Molten Steel from Tundish to Continuous Casting. These are highly suitable for open casting.

What is a ladle nozzle used for?

Ladle-nozzle – a type of refractory products used in the process of non-stop casting of steel. They are part of the components of refractories to a steel casting slide gate. They are an integral replaceable part of the nest block.

In general, Learn more about the differences between ladle nozzle and tundish nozzle by reading this article. What's more, Get an in-depth look at the difference between ladle furnace and tundish furnace. If you are interested in refractory nozzle and other refractory products, welcome to view our factory to know more.

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