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Veneering, applicable to batch type furnaces, is a process wherein veneer modules - a low thermal mass insulation material - are applied from hot face of existing refractory lining. These veneer modules, made from compressed ceramic-fiber blanket strips, have low thermal conductivity that results into higher temperature differential between veneer module and refractory.
This reduction in exposed mean temperature of the refractory results into less heat storage in refractory, thereby reduction in heat loss. Whereas, during furnace shutdown veneering prevents heat loss from the hot face of the refractory, working as insulation for heat retention in refractory bricks so, lesser heat and time required for next start.
Since, modules are applied on the existing refractory lining, the complete implementation process require only 3-4 days of down time. The implementation process includes; 1) Surface finishing/preparation; 2) Pasting veneer modules and 3) Heat Retardant Coating