Tundish Boards

Vacuum-formed silica boards

Vacuum-formed silica-based insulating boards used as the working lining of the tundish in continuous casting. Engineered for low thermal conductivity, minimal steel contamination and clean, single-use disposability at end of cast.

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Overview

Built for consistent service.

Manufactured by a controlled wet-forming process using high-purity silica fibres and inorganic binders. Boards are dried through a sequenced drying cycle to eliminate internal moisture gradients, producing a lining with predictable thermal behaviour and a consistent inner surface. Standard boards are supplied in 20 mm and 25 mm thicknesses, cut to your tundish geometry.

Technical specification

Datasheet.

Parameter	Value	Unit
SiO₂	90	% min
Al₂O₃	3.5	%
Bulk Density	0.55 ± 0.05	g/cc
Cold Crushing Strength	3.5	kg/cm²
Modulus of Rupture	2.8	kg/cm²
Service Temperature	1600	°C
Thermal Conductivity	0.28	W/mK @ 1000°C
Linear Shrinkage (1400°C × 3h)	≤ 2.5	%
Standard Thickness	20 / 25	mm
Standard Sizes	As per tundish drawing

Values marked [VALUE] confirmed per production lot. Certificate of analysis supplied on request.

Applications

Working lining for slab, bloom and billet tundishes
Insulating base and side-wall boards
Single-heat and sequence casting operations
Clean-steel and low-carbon grades

Advantages

Low thermal conductivity — reduced heat loss from liquid steel
Minimal reaction with molten steel, low pickup
Fast, clean tundish preparation between heats
Consistent thickness and dimensional accuracy
Easy removal at end of cast — reduced turnaround

Handling, storage & installation

Store boards flat, off the floor, in a dry area. Do not stack more than five high. Handle by edges; avoid impact on the working face. Pre-installation, allow boards to acclimatise for at least 12 hours in the tundish preparation bay.

Packing & despatch

Palletised, shrink-wrapped, boards separated by protective sheets. Standard pack: 20–40 boards per pallet depending on size. Lead time: 7–10 days ex-plant.

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