GUOSHI ADVANCED MATERIALS
Ceramic parts
for industrial furnaces
Radiant tubes, riser tubes, protection tubes, burner tubes and refractory materials for industrial furnaces, made in Zibo, Shandong, China.
AI-assisted concept render, not a product photograph
3D PRODUCT VIEW
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An outline sketch of the burner tube. Drag to turn it and look at the octagonal body and the opening at its end.
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- [email protected]
- Telephone
- +86 533 5375177
- Address
- Zibo, Shandong Province, China
- Office hours
- Mon–Sat 08:00–17:30 (GMT+8)
Silicon nitride radiant tubes
Widely used in aluminium, copper and other non-ferrous metal processing, with very high thermal conductivity and service life and low adhesion of molten metal.
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The 3D view is a sketch of the outer form built from existing photographs. Dimensions and internal structure are to be confirmed against Guoshi drawings.
01 / SPECIFICATIONS
Typical properties and sizes.
| Material | Pure Si₃N₄, hot-press sintered |
|---|---|
| Bulk density | To be supplied by Guoshi |
| Max service temperature | To be supplied by Guoshi |
| Thermal shock | Heated above 1000 °C in air and quenched repeatedly without cracking (brochure) |
| Melt contact | Stable against most metal and alloy melts (brochure) |
| Friction | Low coefficient, self-lubricating |
Also known as
- silicon nitride radiant tube
- silicon nitride protection tube
- silicon nitride sheath
- heater protection tube
- silicon nitride heater protection tube
- silicon nitride heater sheath
- immersion heater protection tube
- immersion heater sheath
- silicon nitride SiC heating element protection tube
- silicon nitride SiC heating element sheath
- immersion SiC heating element protection tube
- immersion SiC heating element sheath
- protection tube for molten aluminium
- molten aluminium heater protection tube
- silicon nitride heating tube
Names commonly used in the industry for this product and its same-material companion parts.
Range and formats
| Type | Outer Ø | Length | Typical use |
|---|---|---|---|
| Element sheath | To be supplied | To be supplied | Galvanizing line heaters and burners |
| Degassing parts | — | — | Aluminium degassing units |
Design preview: specifications, suitability and supply information require confirmation before publication. Not for quotation or product selection.
02 / MATERIAL & PROCESS
Silicon nitride radiant tubes
Made from Guoshi’s own high-purity silicon nitride: slurry preparation, spray granulation, high-pressure forming, machining, then high-temperature pressure sintering. The result is a fully dense single-phase ceramic rather than a bonded aggregate.
Used where the part touches the melt or protects a heating element: degassing units and holding furnaces in aluminium plants, thermocouple protection in contact with molten aluminium, element and burner sheaths on galvanizing lines.
- 01Dense, not bondedHot-press sintering closes the porosity; there is no bond phase for a melt to attack.
- 02Made from own powderGuoshi produces the high-purity Si₃N₄ it forms these parts from.
- 03Where the bonded tube stopsBelow the nitride-bonded tube’s window and in direct melt contact, this is the part to specify.
03 / APPLICATIONS
Where it is used.
AVertical immersion
BHorizontal, through the side wall
- Guoshi product
- Refractory
- Steel shell
- Molten aluminium
Sketch of typical installations, not to scale and not of a particular customer’s plant. Guoshi parts are outlined in black and marked with a red leader.
Animated sketch of typical operating conditions, not of a particular customer’s plant. Equipment and sizes are not to scale.
- 01Aluminium processingThe aluminium processing industry.
- 02Copper and other non-ferrous metalsCopper and other non-ferrous metal processing.
ENQUIRY
Silicon nitride radiant tube
Send the drawing, quantity or operating conditions you have, and Guoshi will reply by email.
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