System and method for measuring the thickness of refractories

System for measuring a refractory thickness comprising:

• a heat flow measuring device measuring the heat flow from a refractory hot face to a refractory cold face, the heat measuring device comprising:
• a core surrounded by a thermally insulating jacket, wherein the core conducts heat, between a core first face and a core second face, from a refractory hot face refractory a cold face ;
• and
• a measuring device that:
• continuously measures a first temperature T1 on the core first face and a second temperature T2 on the core second face;
• determines the heat flux flowing through the heat flow measuring device (10) from the relation:
• q
• .
• TMFX
• =
• k
• TMFX
• ·
• (
• T
• 1
• -
• T
• 2
• )
• L
• where qTMFX is the heat flux flowing through a thermal flow meter, L is the length of the thermal flow meter and kTMFX is the equivalent thermal conductivity of the thermal flow meter;
• determine the refractory thickness from the ratio:
• Δ
• ⁢
• x
• =
• k
• M
• (
• T
• 0
• -
• T
• 1
• )
• q
• TMFX
• where Δx is the refractory thickness, kM is the equivalent thermal conductivity, and T0 is the temperature at the refractory hot face.