Refractory Patching Paste
Phosphate-bonded refractory plastic for hot-repair maintenance
View details Consumables · Refractories & insulation
Refractory Castables and Bricks
High alumina castable refractories for furnace hearths and walls
Overview
What it is and where it works
Low-cement castables, precast shapes and bricks for lining aluminium melting and holding furnaces, ladles and launders. Metal-contact zones (hearth, lower sidewall, belly band) need aluminium-resistant grades with non-wetting additives to limit penetration and corundum growth. We source the grade for each zone of your furnace.
- Type
- Low-cement castables (cast, pumped or vibrocast) and precast shapes
- Non-wetting additives
- Barium, boron or fluoride; they lose effectiveness above about 927 °C (1,700 °F)
- Critical zones
- Hearth, lower sidewall and belly band: highest metal contact and mechanical wear
- Binder
- Colloidal silica, for maximum strength and ease of application
In your plant
Where It Is Used
- Hearth and sidewalls of reverberatory melters
- Holding and dosing furnaces
- Launders, troughs and ladles
- Precast burner blocks and door jambs
To quote, we need
Send Us These Data Points
With this information we can ask the right factories and come back with a proposal that fits your process. Missing something? Send what you have: we fill the gaps together.
Request a Quote Printable checklist to fill with your plant teamWe reply in English, Spanish, Italian or Chinese.
- Furnace type, capacity and lining drawing
- Zone to line (hearth, sidewall, roof, launder)
- Alloys melted (Mg and Zn content) and bath temperature
- Flux practice (chlorine-containing or not)
- Quantity in tonnes and installation method
One supplier, one shipment
Often Quoted Together
Need something different? We adapt sizes, materials and specs to your drawing.
Buyer questions
Frequently Asked Questions
What causes corundum build-up?
Reaction between aluminium and the refractory, accelerated by high temperature and by Mg and Zn in the alloy. Aluminium-resistant grades and keeping bath temperature under control limit it.
Can I use the same castable in the roof and the hearth?
Not usually. Metal-contact zones need non-wetting grades, while the roof and upper walls face alkali attack and thermal cycling instead.