Regenerative combustion technology brings new developments to aluminum melting furnaces. It is suitable for both new aluminum melting furnaces and old furnaces, and its application range is very wide. In addition, the ultimate "extreme" recovery of flue gas waste heat is a major feature and advantage of the aluminum melting furnace. By applying the waste heat recovery device, the heat recovery rate reaches more than 80%, and the temperature efficiency reaches more than 90%. The exhaust smoke loss is reduced and the combustion saving rate is improved. The energy saving effect is very significant. The combustion air can be preheated to 800~1000℃, which is only 50~100℃ lower than the furnace temperature. Generally speaking, for every 100℃ increase in the preheated air temperature, the theoretical combustion temperature can be increased by 50℃." It can recover the sensible heat of high-temperature flue gas to the maximum extent.

Secondly, it can reduce the burning loss rate while extending the life of refractory materials and furnaces. Because regenerative combustion is a diffusion combustion method, high-temperature furnace gas fills the furnace, the temperature difference in the combustion furnace is small, the furnace temperature is evenly distributed, and the temperature gradient is only 30~50°C, making it difficult to form local high-temperature areas. At the same time, the increase in average temperature greatly enhances the radiation heat exchange capacity in the furnace, which not only improves the heating quality, but also reduces the oxidation and burning rate of the workpiece, greatly increases the output, and extends the life of the furnace. At the same time, the uniform distribution of furnace temperature can make the heat-resistant materials evenly heated and ensure that they always work within a reasonable temperature range. The combustion air is preheated to a high temperature before entering the furnace, which can reduce the impact of thermal shock on watermark-resistant materials. The flame is not generated in the burner, but is burned in the furnace, so the noise is low.

The main factors that affect the amount of NO generated in the furnace gas are temperature, oxygen concentration and residence time in the furnace. The high-temperature and low-oxygen combustion environment and the mixing effect of high-temperature flue gas cause the backflow of the combustion gas to affect the oxygen content in the reaction zone. concentration and flame temperature, thus greatly reducing the amount of NO generated. It can be seen that regenerative combustion can effectively help aluminum melting furnace energy-saving control and low pollutant emissions