In order to meet the severe challenge of energy situation, energy saving and consumption reduction of industrial kilns is an inevitable trend of development. The energy saving of industrial kiln is closely related to the technical progress of kiln lining refractories, kiln technical design and construction.

The energy-saving function of kiln lining refractories for glass kiln construction in industrial kilns is to combine a variety of kiln lining refractories with thermal insulation materials, and adopt lightweight refractory with integrated fire resistance and thermal insulation as the structural material of kiln body, so as to reduce the heat loss and heat storage loss of kiln body and achieve the purpose of energy saving. There are many ways to combine kiln lining refractories with thermal insulation materials. From the point of view of heat transfer, several structural combinations of kiln lining refractories with different thermal conductivities are calculated and analyzed, including the change of heat flux and external surface temperature. In order to optimize the kiln lining refractories of industrial furnaces, according to the analysis of different kilns, the fire-resistant high-temperature thermal insulation coating is the best.

The heat consumption in industrial kilns can be basically decomposed into several parts, such as the heat absorbed by products, the heat absorbed by kiln furniture, the heat taken away by flue gas, the heat absorbed by kiln wall and kiln car, and the heat lost by heat dissipation of kiln body, among which the heat absorbed only by products is effective energy. China's energy utilization rate is low. The average thermal efficiency of industrial kilns is 30%, including forging kilns 5% ~ 20% and heat treatment kilns 8% ~ 25%. The thermal efficiency of continuous heating kilns and tunnel kilns is slightly higher, only 30% ~ 55%, which is quite different from the international average thermal efficiency of industrial kilns above 50%.