A furnace is made of ared brick wall of thickness 0.5m and conductivity 0.7 W/mk.For the same heat loss andtemperature drop - this can bereplaced by a layer ofdiatomite earth of conductivity0.14 W/mk and thickness

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A furnace is made of ared brick wall of thickness 0.5m and conductivity 0.7 W/mk.For the same heat loss andtemperature drop - this can bereplaced by a layer ofdiatomite earth of conductivity0.14 W/mk and thickness