Automatic Electric Tunnel Kiln Equipment Gas Calcined Push Plate

Tunnel Kiln Kiln Equipment Gas Automatic Tunnel Kiln Calcined Push-Plate Kiln

Working Principle of Tunnel Kiln
Tunnel kiln is a kind of traditional kiln used for firing ceramics, bricks and other materials. It works as follows:
1. Loading materials: First of all, the ceramic or brick to be fired at the entrance of the tunnel kiln is loaded into the kiln. Usually, there is a roller conveyor belt inside the kiln that gradually pushes the material into the kiln.
2. Preheating and combustion: After the material enters the kiln, the combustion chamber of the kiln ignites the fuel, such as natural gas or oil, to provide the high temperature required for combustion. The heat generated by combustion will be transferred to the air and the surface of the material in the kiln, making it gradually warm up.
3. Heat exchange: there are usually multiple partitions in the tunnel kiln, which separate the kiln chamber into different areas. There are holes in the partition, so that the flue gas from the kiln passes through the kiln chamber next to it, and the material is heating up for heat exchange. This can improve the efficiency of heat energy utilization and reduce flue gas emissions.
4. Sintering and firing: With the increase of temperature, the material gradually reaches the temperature of sintering and firing. Sintering refers to the process of bonding the particles inside the material together, while firing is the process of forming a strong coating on the surface of the material. These two processes usually require a higher temperature and last a certain amount of time.
5. Cooling and unloading: When the material is finished firing, the combustion of the kiln will gradually weaken, and the cooling air will enter the kiln. Cold air passes through the kiln chamber to gradually cool the fired ceramic or brick, preventing it from cooling too fast and cracking. Finally, the cooled product is removed from the kiln.

Tunnel kiln Zoning
Tunnel kiln can be divided into pre-zone, firing zone and cooling zone.
1, preheat accounted for 30-45% of the total length of the kiln, the temperature range is room temperature ~ 900℃; The body of the vehicle is in contact with the flue gas produced by the combustion of the fuel in the firing zone, and is gradually heated to complete the preheating process of the body.
2, the firing zone accounts for 10-33% of the total length of the kiln, the temperature range is 900℃ ~ the highest temperature; With the help of the heat released by the fuel combustion, the billet reaches the maximum firing temperature required to complete the firing process of the billet.
3, the cooling belt accounts for 38-46% of the total length of the kiln, and the temperature range is the highest temperature ~ the temperature of the product out of the kiln; The high-temperature products enter the cooling belt and exchange heat with a large amount of cold air pumped in from the end of the kiln to complete the cooling process of the billet.

Tunnel Kiln Data Table