TUNNEL KILNS FOR WHITEWARE INDUSTRY

摘要

A tunnel kiln for heating ceramic white ware involving selective use of refractory lining of ceramic fibre module adapted to keep the steady state conductive heat loss through wall at minimum, has been provided to reduce the shell wall temperature by about 30°C compared to existing level in conventional operation, at all the zones e.g. firing zone (HZ), preheating zone (PZ) and the cooling zone (CZ) of the kiln. The roof configuration of the heating zone is also selectively converted from flat top with rectangular section to almost semicircular section at top portion to favor uniform heat flux and improved radiation property of the lining surface that facilitated uniform heating of stock of ceramic wares on trolley inside the kiln. The said use of selective lining pattern and kiln roof modification favoured achieving lower fuel consumption and higher productivity of kiln.