Because of the kiln body structure and the thermal process of different, the intermittent kiln is more than 5 times higher than the flue gas produced by the tunnel kiln. In general, the higher the gas temperature, the greater the proportion of heat loss. Such as gas temperature of 1093, the heat loss of 55%, when the gas temperature of 1427 degrees, the heat loss was 70%. For hot gas intermittent 
sintering refractory down draft kiln, according to the relevant experimental data show that: heat from the flue gas from the furnace kiln accounted for about 35% to 40% of all caloric expenditure, in the absence of any heat recovery measures, the calculation results of heat balance, heat efficiency is in 10% ~ 15%This is a great loss of heat. Therefore, the use of gas heat is a very important energy recovery work.
sintering refractory down draft kiln, according to the relevant experimental data show that: heat from the flue gas from the furnace kiln accounted for about 35% to 40% of all caloric expenditure, in the absence of any heat recovery measures, the calculation results of heat balance, heat efficiency is in 10% ~ 15%This is a great loss of heat. Therefore, the use of gas heat is a very important energy recovery work.
Setting heat exchanger in the flue is an important method for waste heat recovery. Hot air through a heat exchanger obtained can be directly sent to the burner for combustion supporting air, can also be hot air diluted transported to the products of somatic embryos drying kiln drying medium or it, the kiln thermal efficiency reached 30% or higher.
When firing system by changing the preheated air to the heat exchanger, and the hot air do combustion the combustion air can not only increase the kiln thermal efficiency, reducing the 
consumption of fuel, energy-saving effect is achieved. And it can increase the temperature of the flame, increase the heating efficiency, and shorten the heating time (the period). And because of the volume expansion of hot air, the flow velocity of the burner is increased, the gas flow in the kiln is accelerated, and the temperature in the kiln is uniform. The relevant data shows that the fuel consumption can be reduced from 6% to 8% when the air temperature is 220 ~ 250. At the same time the combustion air of different temperatures, a very large impact on the flame temperature. Even in the case of no preheating gas, combustion temperature of gas increases significantly with increasing the preheating temperature of combustion air. Refractorymaterials not only can solve the problem of low firing temperature, but also plays an important role in the enterprise energy saving and reducing consumption.
consumption of fuel, energy-saving effect is achieved. And it can increase the temperature of the flame, increase the heating efficiency, and shorten the heating time (the period). And because of the volume expansion of hot air, the flow velocity of the burner is increased, the gas flow in the kiln is accelerated, and the temperature in the kiln is uniform. The relevant data shows that the fuel consumption can be reduced from 6% to 8% when the air temperature is 220 ~ 250. At the same time the combustion air of different temperatures, a very large impact on the flame temperature. Even in the case of no preheating gas, combustion temperature of gas increases significantly with increasing the preheating temperature of combustion air. Refractorymaterials not only can solve the problem of low firing temperature, but also plays an important role in the enterprise energy saving and reducing consumption.
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