Volatilization of MgO-Bricks with C/Si-Binder

MgO-bricks are often produced with a mixture of carbon and silicon as binder material.

  • Up to which temperature will the brick only exhibit condensed phases?
  • What composition has the gas phase, when the brick begins to show volatilization?

The figures show the results of a complex equilibrium calculation with ChemSage.

  • Figure 1: Above 2040 K carbon is volatilized from the binder and the brick begins to disintegrate. 
  • Figure 2: The gas evolved consists mainly of magnesium and carbon monoxide.