Selection of suitable refractory lining material for industrial furnaces is important, especially for the batch heat treatment furnace which needs to rise and fall of the temperature constantly. Heating up a furnace uses a lot of energy and cooling of a furnace will lose a lot of heat energy. The selection of ceramic fiber blanket and ceramic fiber module as refractory lining material will quicken the heating up speed when rising of the temperature and reduce the heat loss when cooling of the furnace. It also can save the furnace manufacturing cost and prolong the furnace service life. Ceramic fiber blanket and ceramic fiber module are soft and porous material which is full of air inside the pores. They can block the heat air to flow out to store the heat energy and also can block the cold air to flow in, so they are excellent thermal insulation and energy saving products and very suitable to be used as lining material for furnaces and kilns. Lightweight fire bricks are also energy saving materials, but ceramic fiber products have better energy saving effect than the lightweight fire bricks. Ceramic fiber linings are not only widely used in the manufacture of new heat treatment furnaces and other high temperature equipments, but also play an important role in the transformation process of the old furnaces and equipments.

Ceramic fiber products are a new type of refractory insulation material for furnace lining. Because ceramic fiber products have the characteristics of energy saving, high temperature resistance, low density, low thermal conductivity, good chemical stability and good heat and cold insulation, they are commonly used for heat treatment furnaces and other high temperature equipments as hot surface material or insulation material. Generally, ceramic fiber blanket, ceramic fiber module and ceramic fibre board used as refractory linings can save about 10%-30% energy. If they are used in the periodic production equipments or in the intermittent furnaces, they can save 25%-35% energy. Ceramic fiber products have such an excellent energy saving effect that they are widely used in petrochemical, metallurgical and other industrial fields. With the requirement of energy saving, their applications are becoming more and more versatile.