Fused minerals & abrasives
Electro-fused grains for bonded and coated abrasives, blasting and refractory castables.
- Brown Fused Alumina
- White Fused Alumina
- Silicon Carbide
- Fused Magnesia
- Fused Chrome Oxide
- Zirconia Corundum
- Tabular Alumina
Industrial minerals · global supply
The minerals that build industry, sourced with certainty.
Caldera supplies refractory, abrasive and foundry minerals to industry worldwide — fused aluminas, silicon carbide, bauxite, magnesia, graphite and more, delivered to specification with the analysis to prove it.
Refractories · abrasives · foundry · ceramics — delivered to spec, worldwide.
30+
Minerals supplied
40+
Countries served
24h
Typical quote turnaround
100%
Lots with a certificate of analysis
What we supply
A full book of refractory, abrasive and foundry minerals.
Refractory minerals
High-alumina and basic raw materials for shaped bricks and monolithic linings.
- Calcined Bauxite
- Raw Bauxite (Monohydrate)
- Raw Bauxite (Trihydrate)
- Dead Burned Magnesia
- Chamotte (Flint-Clay)
- Mullite
- Kyanite / Sillimanite
- Calcium Aluminate
Foundry & metallurgical
Deoxidisers, additives and moulding minerals for steel, iron and foundry.
- Silicon Metal
- Ferro Silicon Nitride
- Olivine
- Ilmenite
- Fluorspar (Metallurgical)
- Fluorspar (Acid Grade)
Industrial & speciality
Feedstocks for ceramics, glass, chemicals and speciality applications.
- Kaolin
- Feldspar (Soda)
- Feldspar (Potash)
- Zircon Sand
- Flake Graphite
- Amorphous Graphite
- Aluminium Hydroxide
- Aluminium Fluoride
Need a grade that isn’t listed? Ask the desk — most enquiries are sourced within days.
How we work
More than a middleman — a supply partner.
Customised procurement
Sourced, blended, sized and packed to your plant’s spec — the exact grade, grit and chemistry your process needs, not a catalogue approximation.
Financing & terms
Prepayment, inventory and flexible terms that let producers and consumers hold the right stock without tying up working capital.
Logistics & freight
Bagged, big-bag or bulk — booked, insured and tracked from load port to your gate, with documentation that clears customs cleanly.
Quality management
Specification, shipment after shipment.
A mineral is only as good as its consistency. Caldera controls grade at source, verifies it before loading, and documents every lot — so what lands at your plant matches what you qualified.
- Independent pre-shipment inspection on request
- Consistent chemistry and sizing, shipment to shipment
- Full provenance — mine to mill to your gate
Documented
Every lot
ships with a certificate of analysis and origin — chemistry, sizing and provenance you can hand straight to QA.
Request a quote
Tell us what you need. We’ll price it.
Send the grade, tonnage and destination — a trader replies with availability and an indication, usually within one business day. No account, no platform; just a direct line to the desk.
- Direct reply from a trader, not a bot
- Samples and certificates of analysis on request
- Or email trade@caldera.trade