Unique expertise


In the foundry industry, silica based refractories – SILICA MIX- have been well known for many decades as linings for Coreless Induction Furnaces for melting and holding iron. Calderys has the highest grade of raw material for foundry SILICA MIX in the world, thanks to the integration and acquisition of Svenska Höganäs in 1999.


The SILICA MIX produced with the Swedish quartzite formed on the Dalsland and processed into our Amäl Plant and our laboratories, has very unique properties, thanks to exceptional conditions (*):

  • excellent thermal stability reducing the risk of crack formation due to the microcristaline quartzite
  • strong resistance to chemical attacks linked to the purity of the SILICA MIX
  • ultra low porosity on the surface when sintered that reduce the risk of vapors to pass through the lining and condensate
  • low level of heat losses due to a relative low density
  • compatibility to most slags when melting iron, as SILICA MIX is acidic.

Continuous development is taking place at Calderys Research Centre to improve the properties of our silica based materials: Improvements on the resistance for chemical attack, reduced risk of segregation, improvement on handling practices, etc. Installation equipment such as the Compactor developed by Calderys, allows for faster and easier installation.

The Calderys SILICA MIX range is very well suited for most CIFs and Channel Furnaces applications, whatever the alloys, melting temperatures, operating conditions and, installation techniques in use. It is sold worldwide in over 40 countries.

If you want to know more, please contact our Expert!

(*) Due to an underwater volcanic eruption, silicic acid dissolved in water and precipitated in the surrounding areas forming sediment layers called chert. The sediment layers were transformed to rock by compaction at elevated temperatures. During the cooling down of the bedrock, re-crystallization occurred and formed the unique microcrystalline quartzite that can be found at our quarry in Amäl.

About Calderys

Our mission is to help you meet your ever increasing production and productivity targets, whilst protecting the safety of your people and the integrity of your equipment. Our focus is to deliver safe, reliable and high performing refractory solutions customized to your needs. Our international production and sales facilities allow us to develop and deliver customized solutions based on monolithic and ready shape monolithic refractory materials worldwide in a fast, efficient, and safe manner.


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International projects involving multiple business units are commonplace at Calderys. This is a fine example of employees utilizing company resources to better serve our customers.

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