How many fire holes does the tunnel kiln need? How much is appropriate?

A tunnel kiln with a general length of 100-200m has about 45 fire holes.

Tunnel kiln:

Tunnel kiln is a modern continuous firing thermal equipment, which is widely used in the roasting production of ceramic products and also in metallurgical industries such as abrasives. Among them, the latest tunnel kiln designed by Leningrad in Russia is more advanced.

The tunnel kiln began in 1765, when only the glaze color of ceramics could be burned. To 18 10, some of which can be used to burn bricks or pottery. From 1906, it can be used to burn porcelain tires. At first, the famous tunnel kiln was Foucault type. 19 10 years later, there are many ways to improve.

Tunnel kiln is generally a long and straight tunnel with fixed walls and vaults on both sides and at the top, and the kiln car runs on the track laid at the bottom. Combustion equipment is located on both sides of the middle of tunnel kiln, forming a fixed high temperature zone-firing zone. Under the action of chimney or induced draft fan at the front end of tunnel kiln, the high-temperature flue gas produced by combustion flows along the tunnel to the kiln head, and the products entering the kiln are gradually preheated, which constitutes the preheating zone of tunnel kiln. Cold air is blown into the end of the tunnel kiln to cool the products in the back section of the tunnel kiln. The blown cold air flows through the product and is heated, then it is pumped out and sent to the dryer as the heat source for drying the blank. This part constitutes the cooling zone of the tunnel kiln.

Put the sagger with ceramic products on the trolley, and the trolley will be pushed in continuously and slowly from the inlet of preheating zone (generally by machinery), while the trolley with sintered products will be pushed out gradually from the outlet of cooling zone (about 1 hour, one trolley will be pushed out).

Used for continuous heating of steel billets or continuous sintering of ceramics.