Made of refractory materials with low thermal conductivity.
Water cooling in the presence of temperature extensions of 40 mm.
Blowing air through the double wall.
In my experience, a refractory lining was used on the inner wall of the apparatus and the temperature on the outer wall did not exceed 80 degrees. Around the device enclosing structure to detect burnout infrared temperature meter.
The thermal balance will change, the installation will have to be heated additionally, to compensate for heat losses through the wall.
Make the formwork and pour around the size of a layer of refractory concrete 100 mm, then a couple of layers of heat-insulating plate of 50 millimeters each and a covering of iron on the outside.
The lower half of the reactor can be safetravel. All layers should be stitched, so as not to fall out anchors in the frame.
Features:
The mats will still leave gaps between joints as they do not reliably lay.
The casing with a layer of air inside will not save due to the fact that the mats will not give proper insulation. Heat bridges will perfectly dissipate heat on the outer surface of the casing.