Mullite

Mullite is the mineralogical name given to the only chemically stable intermediate phase in the SiO2 - Al2O3 system. It is a high alumino-silicate produced by calcining low alkali clays in a rotary kiln.

Mullite product uses 

Refractories

Mullite is used in the manufacture of high quality fired and monolithic refractory products.

 Mullite properties 

  • Good high temperature strength
  • Good thermal shock resistance
  • Excellent thermal stability
  • Good abrasion resistance
  • Good resistance to most chemical attack.
  • Good resistance to oxidation and attack by furnace atmospheres
  • Good electrical resistance

Mullite is available in grades 60 and 70 as standard, both of which have excellent properties for use in refractory production including:

Chemical properties 


Mullite 60 Mullite 70    
Al2O3 (%) 60.0 70.1    
MgO (%) 0.2 0.2    
SiO2 (%) 34.5 23.5    
Fe2O3 (%) 1.4 1.5    

Contact your local representative to find out more or to request a datasheet.

Mullite standard grades

LKAB Minerals range of magnesite materials are available in the following grades as standard: 

5-8mm (-8+5mm)
3-5mm (-5+3mm)
1-3mm (-3+1mm)
0-5mm (-1mm)
0-250μm (-60#)
0-150μm (-100#)
0-15μm (-200#)

Other grades are available on request.

Mullite packaging

Our magnesite materials are available in 25kg paper sacks, 1000kg bulk bags or as bulk as standard. 

Mullite origins

LKAB Minerals' Mullite is sourced from China and is synthetic.

Mullite toxicology

Mullite is inert and non-toxic. 

Please contact us for datasheets on a single grade or further information on our Mullite product range. You can find our sales contact by choosing your country in the upper right expert box of this page.

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Product expert

Vicky Yates
Sales Manager, Refractory Minerals & Olivine

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