Submerged Entry Nozzle

中冶产品_0003_1cdc77f7d2eb17907155c779458fcee5

中冶产品_0000_544e79ee5c013e712ed3b08a5b912107

中冶产品_0002_38a90d843309e4a5d3f975fab6101712

Submerged Entry Nozzle

Product Description

Submerged entry nozzles (SANs) come in various structural forms, including those with side holes and straight-through types. In continuous casting equipment, they are installed at the bottom of the tundish and inserted below the molten steel surface in the mold, acting as a refractory sleeve to control the flow and injection speed of the molten steel. The main functions of SANs are to prevent secondary oxidation and splashing of the molten steel in the tundish; to prevent mold flux from being drawn into the molten steel; and to improve the flow and heat distribution of the molten steel within the mold. This promotes uniform growth of the billet shell within the mold and facilitates the removal of gases and inclusions from the steel. They require excellent slag corrosion resistance, good thermal shock resistance, erosion resistance, and prevention of blockage.

Applications: Molten steel flow guidance and protection

Customization Services: OEM and ODM services available based on samples/drawings

Minimum Order Quantity: 1 piece

Packaging: Inner plastic bag, outer wooden box

Specifications: Multiple standard specifications available; customization supported

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Basic Info
Core Highlights
FAQ
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Basic Info

Item		Body	Slag Line
Chemical Composition(%)	Al203	≥45
	C+siC	≥25	≥15
	Zr02		≥75
Bulk Density(g/cm3)		≥2.45	≥3.6
Apparent Porosity(%)		≤18	≤18
Cold Crushing Strength(MPa)		≥20	≥20
Modulus of Rupture-Room Temp(MPa)		≥7	≥7
thermal shock resistance(sequence)		≥5	≥5

Core Highlights

1. The main body is made of aluminum-carbon materials with excellent thermal shock resistance.

2. The aluminum-zirconium-carbon composite material offers enhanced slag resistance.

3. Refractory fiber insulation effectively prevents condensation on cold steel.

4. The product has a reasonable design and strict process control.

5. Suitable for various types of continuous casting and rolling production lines.

FAQ

Q: Slow Heat Conduction

A: 1. Not preheating according to the standard procedure.
2. Slag influences heat conduction.
3. The crucible has reached its service life.
Q: Crucibe corrosion

A: 1. Adding flux before metal is molten or excessive use of flux.
2. Certain fluxes contain corrosion substances.
3. Fuel containing corrosive substance.
4. Abnormal high-temperature operation may result in glaze layer smelting resembling corrosion.
Q: Top problems

A: 1. Repeatedly top impacted on top area cause oxidation.
2.Slags accumulated arround the top area or between the top area and the furnace cover.
3.Small gape between the top and the furnace cover. 4. Low temperature on top area.
5. Contacting with some matels with lager heat exchanging coefficients.
6. Excentral installation cause not enough space between the top and furnace.
Q: Excessive oxidation

A: 1. Flame in furnace against the bottom of the crucible directly.
2. Low temperature in the top area. 3.Overheated working temperature.
4. Hoisting or moving improperly damages glaze layer.
5. The emergent drain hole is open.
Q: Explosion

A: 1.Heating rapidly while the crucible has damped during transportation or storage.
2. Over rapid heating-up during preheating procedure.
3. The added materials are not completely dried.
Q: Middle or bottom craks

A: 1.Impacted during transportation or installation.
2. Crucible should be placed in the middle of the furnace stack smoothly and stably.
3. An improper graphite stand is used.
4. The existence of great thermal difference in the furnace.
5.Matel ingots in the crucible filled horizontally or diagonally.Metal materials overfilled.
6. Leftover slag or molten matal in the crucible.

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