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Silicon carbide is used for the de-oxidation and re-carburation of cast iron and steel in foundries. Metallurgical grade Silicon Carbide grain is a unique material for use in the production of iron and steel.  It is used in the foundry industry for electric furnace production of gray, ductile, and malleable iron.  It is an excellent source of carbon and silicon, promoting nucleation and rendering the iron more responsive to inoculation, deoxidizing the iron, which enhances furnace lining life. Silicon carbide can also be used to enhance efficiency in ferroalloy production using the patented Maxred process developed by Sublime Technologies. Products are custom formulated and sized to client specifications.

Sublime offers Four standard Grade products:

  • Premium Grade Metallurgical >97% SiC (Crystalline)
  • High Grade Metallurgical 88-92% SiC (Carbosil)
  • Medium Grade Metallurgical 82-88% SiC (SubSiC85)

As with higher grade materials, SubSiC85 is also used as a deoxidising agent in LD/BOF/ladle furnaces.  More recent applications for SubSiC include the patented MaxRed process developed in South Africa for the Ferro Alloys industry.

  • Low Grade Metallurgical 30-40% SiC (SubSiC35)

Sublime’s low grade material is supplied to the steel and foundry industry also in applications mentioned above