Tunnel kiln is an advanced and automatic technology in brick making industry.
1. Continuous kiln
A tunnel kiln is a type of continuous kiln that is typically open on both ends and heated centrally. Building materials, such as bricks, may be passed through the device in an uninterrupted fashion, allowing large volumes to be processed without shutting off the kiln between batches.
A number of different methods can be used to heat tunnel kilns. Typical heat sources include coal, gas, and other fuel.
3. Automatic Computer-controlled
Tunnel Kilns are computer-controlled, continuously operating car-bottom kilns. Computer technology allows kiln car movement through the kiln to be controlled for changes in firing curves and firing temperatures. Automatic controls can be programmed to make firing changes for differences in product size and color.
4. High capacity
Pushers move the train of cars non-stop at a predetermined rate. This method is ideal for all ceramic industries requiring high volume production and/or a continuous production process.
You are interested in tunnel kiln, you have to consider two conditions:
The fuel can be coal, gas, coal-gas, oil etc.
The investment budget will be depend on the automatic degree (project design and feasibility study, investment pay-back period)