Slag Conditioners

INTOCAST is able to provide slag conditioners as primary or secondary products from a great number of supply centres. We have a wide range of economically attractive solutions to offer. Individual plant scenarios are discussed and best product options are selected in cooperation with the customer.

  • Products based on magnesite with different degrees of calcination (LOI of 30%, 10%, 5%) – different ranges of grain size are available to suit addition method and addition requirements.
  • Products based on dolomite with different degrees of calcination (LOI of 50%, 1%) – different ranges of grain size are available to suit addition method and addition requirements.
  • Alumina carriers (bauxite basis, other primary materials), suitable recycled materials with and without metallic aluminium content
  • Synthetic slags are offered as recycled material or specially made products (sintered or pre-fused)

The main reason for consuming magnesitic and dolomitic slag conditioners is the enrichment of slags with basic oxides. They are needed to perform metallurgical work and for the protection of refractory linings. Pneumatically conveyable slag conditioners with higher LOI percentage also provide ideal support in slag foaming.

Calcium-Aluminate slag conditioners create favourable conditions for speeding up reactions rates in metallurgical work. Besides improving reactivity, they also increase the slag’s capacity for scavenging molten impurities.


TOPEX MgO-CSC is a semi-calcined Magnesite product supplied in briquette form. At temperatures in excess of 900°C it disintegrates while releasing CO2 and H2O and turns into highly reactive MgO. Process technology advantages that can be derived from its chemical composition as well as the physical properties of TOPEX MgO-CSC are documented in a patent. Regarding the  generation of foamy slags, results of operation campaigns have confirmed the outstanding superiority of this product. This also applies to slag splashing where TOPEX MgO-CSC is preferred compared to traditionally used dolomitic lime.

Microscope view