The so-called high thermal sensitivity is also called low thermal inertia. Furnaces with high heat sensitivity are required to be able to adapt to automatic control and rapid heating, and strictly control the furnace temperature rise and fall curve.
However, in the traditional heavy furnace lining, the stored heat of the furnace wall not only accounts for a large proportion of the fuel consumption, but also directly affects the thermal performance of the furnace. When the temperature rises, almost all the heat is absorbed by the furnace lining material, the furnace temperature rises slowly, and the temperature of the furnace wall is almost synchronized with the furnace temperature. When the temperature is lowered, the heat released is almost all the stored heat of the furnace wall, and the furnace temperature drops very slowly.
Therefore, it is very important to choose a refractory lining with less heat storage. Compared with other heavy refractory materials, ceramic fiber modules have lower heat storage. Take the heat treatment furnace as an example. When the furnace temperature rises from 1200 degrees to 1270 degrees, it takes 70 minutes for the hearth of the heavy refractory lining, while the ceramic fiber lining only takes 10 minutes.
While facilitating temperature control, it reduces heat loss, improves production efficiency, and saves energy consumption.
For the selection of refractory lining of furnace wall, it is recommended to use ceramic fiber module + ceramic fiber blanket for the new furnace; for heavy refractory furnace lining, a layer of ceramic fiber blanket can be pasted on the surface, which can also effectively reduce the furnace body. The stored heat can improve the heat sensitivity of the furnace.
