MinSand is a perfectly spherical refractory bead produced by fusing and supercooling Bauxite in an electric arc furnace.

MinSand product uses


Because of its almost perfectly spherical particle shape, MinSand is widely used in the foundry industry as mould and core sand. In core production, binder savings of up to 50% compared to other sands are achievable without loss in core strength. At the same time, MinSand cores show excellent surfaces and thus produce excellent casting surfaces.

A Foundry core produced using LKAB Minerals MinSand

MinSand properties

Flow Characteristics

The spherical particle shape significantly improves the flowability of the sand/binder mixture allowing cores of complex shapes to be blown when compared to alternative angular sands.

Thermal Expansion

MinSand has a very low rate of thermal expansionwhich enables castings to be produced with a high degree of dimensional accuracy when compared to mould and cores produced from alternative sands. This is eminently suitable for automotive cylinder blocks and heads.

Binder quantities/strength

The spherical nature of LKAB Minerals MinSand results in a reduced surface area enabling cores and moulds to be produced using lower resin additions. The mixed sand costs are reduced accordingly because of the lower resin demand.

Resin Systems

LKAB Minerals MinSand is compatible with resin systems including pre-coated shell moulding sands. The sand grains have a very smooth surface that is easily resin coated.

The typical properties of MinSand are:

Physical properties:

Bulk density (g/cm³) 1.9
pH 7.5
Particle shape

Chemical properties:

Al2O3 (%) 75.9
Fe2O3 (%) 1.59

MinSand standard grades

MinSand is available in the following:

P Grades    AFS 30, AFS 40, AFS 44, AFS 50, AFS 55, AFS 65, AFS 75, AFS 80, AFS 90, AFS 110
G Grades     AFS 30, AFS 40, AFS 50, AFS 55, AFS 65, AFS 75, AFS 80, AFS 90

Please contact your local sales representative for further information by using the contact us area above.

MinSand Packaging

Regular packaging modes for our MinSand are big bags (1000 kg) and small paper bags (25 kg).

MinSand toxicology

For further information on toxiciology, you can download the Safety Data Sheet in the section on the right hand side.

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

Product expert

Martin Meese
Product Manager, Foundry & Glass

Ask me a question. Contact information.


More information

  1. MinSand Product Data Sheet.pdf

Safety data sheet

  1. MinSand SDS
  2. More languages upon request.