Product information

LKAB Minerals offer a range of Magnesites, including Dead Burnt Magnesite, SKLS Magnesite, and Nedmag Magnesia, for a number of refractory applications.

Magnesite is a natural ore identified as magnesium carbonate, occurring as a primary mineral in igneous and sedimentary rocks, with a number of refractory applications.

Dead Burnt Magnesite is made by calcining the magnesite ore in a rotary kiln to produce a high-purity product with high purity, stability, and good sintering properties.

SKLS Magnesite, also known as Periclase, is made using a calcination and seawater process.

Nedmag 99 is a high-purity synthetic Dead Burned Magnesia produced by Nedmag Industries. It has a magnesia content of 99% min.

Refractory-grade Magnesite standard grades

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

Other grades are available on request. Please get in touch for further information.

Refractory grade magnesite packaging

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

Mineral information

The typical properties of refractory-grade Magnesite.

Physical properties of refractory-grade Magnesite

Bulk density [g/m³]>2.45
Total moisture [%]<0.50
App. Porosity [cm³s²]<8.0

Chemical properties of refractory-grade Magnesite

Dead Burnt MagnesiteSKLS MagnesiteNedmag 99 Magnesia
MgO [%]95.8297.2098.50
Al2O3 [%]
SiO2 [%]1.480.250.13
Fe2O3 [%]0.800.200.48


The origins of our Magnesite materials are as follows:

  • SKLS Magnesite – originates from Ireland.
  • Dead Burnt (DB) Magnesite – originates from the Liaoning province in China.
  • Nedmag 99 Magnesia – sourced from The Netherlands.


Magnesite products are inert and non-toxic. You can download the Material Safety Datasheets in the data centre.