Silicon Carbide Briquettes

HISTORY AND DEVELOPMENT

Silicon Carbide is well known in the ferro alloy industry as a powerful reductant that can increase the performance of furnaces. Its use has been limited because lumpy silicon carbide is difficult to use in the ferro alloy process:

  • It can react too early in the production process. If the reaction takes place too high in the furnace its effectiveness is lost as heat is wasted, leaving the furnace as hot gas rather than being utilised to reduce the ore.
  • The high cost of lumpy silicon carbide. The power consumed in production makes the cost of silicon carbide uneconomical when compared to carbon reductants.

Our briquette is a lower cost alternative to lumpy silicon carbide.

The briquette has been specifically designed and developed to overcome the inherent difficulties of using lumpy silicon carbide and the stability and strength of the briquettes has been improved continuously during product development.

HOW THEY WORK

Energy that would usually leave the furnace and be lost in the hot gases is utilised to produce a chemical reaction within the briquette.

The SiC crystals store the energy as they move into the smelting zone of the furnace where the energy is released to reduce the ore.

Redistributing and recycling energy that would usually be lost as waste gas back into the reactive zone.

RESULTS RECORDED DURING TRIALS

  • Higher operating power in the furnace resulting in higher daily metal output
  • Silicon and sulphur content in alloy reduced
  • Lower consumption of fixed carbon
  • Higher chrome yield from ore to alloy
  • Higher chrome content of the final product
  • Lower unit power consumption

ADVANTAGES OF USING SIC BRIQUETTES TO REPLACE SOME FIXED CARBON

SiC Briquettes are a lower cost and more effective alternative to lumpy SiC.

They can replace some of the standard carbon reductants as well as some quartz. The optimum level of additions can fluctuate from furnace to furnace depending on the raw materials used and operating systems.

SiC briquettes allow for more efficient utilisation of energy in the furnace, which other reductants cannot do.