New Advanced Technology Brick Tunnel Kiln Fired Clay Brick Kiln

Ibrick China provide fully automatic brick making line tunnel kiln with tunnel dryer chamber project design 
China new advanced technology fired clay brick kiln.clay brick dryer chamber, brick hoffman kiln 


Tunnel Kiln:
The tunnel kiln has a complete system of smoke discharging, cooling, waste heat releasing, pressure balancing under the kiln car, running and detecting system. Baking curve inside of the kiln is more reasonable,and production system becomes more coordinated through adjustment to those systems.
At the entrance side, there is a preparatory room, and a cut-off door between the preparatory room and the kiln pre-heating zone.
There are entrance and exit doors at both ends of the tunnel kiln. Thus it effectively prevents the cold air from entering the kiln and ensure the baking system inside not be influenced by the outside condition.

Kiln roof structure: One kiln car space remained in low temperature zone on both sides, which adopts cast-in concrete top slab. For other position, clay material plate, hanger plate through davit hang under H type steel beam by cast product. Both sides firebrick wall support the main beam's weight. Refractory fibrofelt, rock wool felt, rock wool board are put on the refractory hander plate, which compose the complex insulation layer. High temperature binder is being filled up to the gap between the boards, and is being painted on the upside of the insulating layer, thus to ensure the material's insulativity and structure's durability.
Tunnel kiln is the most popular kiln to use for building clay brick making process, It is easy to design for automatic production line comparing with traditional kilns, We can offer the best designs for customers, in order to reduce the cost and increase the production rate.

Our company not only provides customers with various brick machines, but also provides services like process design of clay brick, hoffman kiln design and construction, brick dryer design and construction. Undertake turn-key project and project contract.


Our engineers design and help customers build hoffman kiln and brick making factory.
Tunnel kiln 
Fuel for firing: Coal, nature gas, oil 
Firing temperature: Around 950 degree 
Length of tunnel kiln: 144m for annual capacity 30million PCS bricks, (the dimension of kiln will be different according to different capacity)
The quantity of kiln cart in kiln: 32
The pass percentage: ≥ 95%


The advantages of the tunnel kiln:
1. Continuous work reduces the cycle period
High output
3. Performance of temperature keeping
4. Low fuel consumption
5. Saves the manpower
6. Environmental friendly.
7. Longer life.

We offered drawing layout and technicians to guide building the whole plant, including tunnel Kiln with tunnel dryer, or provide turnkey project. Building the whole plant, we will install machinery and conduct trial operation, after that we will train your local personnel how to operate the machines and how to maintain them daily. If you need more information, please send your detailed requirements to us.  

------ Structure
Foundation: Tunnel kiln is with strip foundation. From bottom to up by order is lime soil, rubble, reinforced concrete girder (railway girder)/ board (under kiln wall)
Wall: Red brick is laid for the pre-heating zone and cooling zone where the temperature is below 200ºC. The rest is adopt combined wall. The fireclay bricks will be laid on the baking zone and inner wall of insulting zone. The clay insulting bricks will be used for laying the insulting area. Meanwhile, refractory fabric felt ( for the relative part of temperature curve above 600 Celsius) or rock wool felt will be used for stuffing and red bricks will be laid on the external wall.

Kiln roof structure: One kiln car space remained in low temperature zone on both sides, which adopt cast-in concrete top slab. For other position, clay material plate, hanger plate through davit hang under H type steel beam by cast product. Both sides firebrick wall support the main beam's weight. Refractory fibrofelt, rock wool felt, rock wool board are put on the refractory hander plate, which compose complex insulation layer. High temperature binder is being filled up to the gap between the boards, and is being painted on the upside of the insulating layer, thus to ensure the material's insulativity and structure's durability.

Coal casting hole: It is with function such as following, replenish heat, debugging, observation, replenish oxygen or cooling under negative pressure, releasing heat under positive pressure etc. This is widely used for tunnel kiln process with inner fuel technology, which can not be cut down or cancelled.
Sand seal: Sand seal slot is being put in the kiln cart skirt board, which insulate the high temperature from outside, thus to avoid cold air sucked into kiln under negative pressure which will lower the kiln temperature, and to avoid high temperature gas go to kiln cart underside under positive pressure which will destroy the kiln cart steel structure or deform the railway.


----- Afterheat system
Products direct heat and afterheat system are being put on top of the tunnel kiln, temperature curve in 450-200 ºC range. Extractive afterheat occupies 80% of the total required heat for drying, heat source clean and no pollution. Through heat exchanger, except whole factory workshop heating, the rest high temperature gas is being sent into drying chamber. Direct heat is being extracted quickly and effectively, this will shorten the kiln length so that to lower the kiln construction investment.

Auto brick tunnel kiln project under construction in Bangladesh 


Brick dryer chamber with brick tunnel kiln technical parameters:
New Advanced Technology Brick Tunnel Kiln Fired Clay Brick Kiln
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