Brick Making Machine with High Quality Brick Tunnel Kiln Equipment

Brick Making Machine with High Quality brick tunnel kiln equipment
We supply main equipments on the brick producing line we can supply as bellow:
1. Raw Material Treatment Machine---------Box Feeder, Double Shaft Mixer, Crusher, belt Conveyor.
2. Brick Forming Machine--------Double Stage Vacuum Extruder, Automatic Cutting Machine, Mixer and Extruding Machine
3. Drying System--------Small Suction Tunnel Drying Chamber, Single Layer Dryer
4. Firing System---------Hoffman Kiln, Tunnel Kiln
5. Automatic Brick Loading and Unloading Machine, Robot Brick Loading Machine.
Raw material preparation
Before raw material being sent into raw material stock, masses of impurity and some organic parts will be eliminated by man power. In raw material stock, clay will be sent to box feeder by loader, and being sent to roller crusher and fine pulverizing grinder. Crushed clay with grain smaller than 3mm, and will be sent to double shaft mixer, water added and mixed, here the material moisture content reach to 13-14%. Thus the raw material is being sent to aging room by warehouse reversible belt conveyor.
Raw material aging process
Material will be aged in the aging room, thus, water inside will be diffused and evenly divided, the grains will be further dissolved, tempered and plasticized so that the shaping performance will be greatly improved.
Aged material will be unloaded on belt conveyor by multi-bucket excavator, then being sent to box feeder in molding process. Box feeder with big stock capacity, which can guarantee the mixer extruder and extruding machine's feeding requirement, stabilize the green brick adobe moisture content and molding process. Meanwhile, this gives buffering time for multi-bucket excavator to change the working position. This also water down the synchronization requirement for former process. The aged material moisture content will reduce 1%.
Molding process
Aged clay material first will be sent to mixing extruder for water replenishing and mixing, then the double stage vacuum extruder will squeeze material to clean-surface and solid-inside columns, which will be cut into the required adobes by cutter.
Extruding machine is the key equipment among the whole production line, its performance are required as follows:
1) They can meet the need of different specification and hole shapes of the brick
2) The vacuum degree is -0.092MPa, the extruding pressure is 1.5-2.0MPa.
3) The hourly output per set is more than 8000PCS bricks.
Drying and firing
Drying and firing will adopt twice setting & firing process. Drying chamber adopts new type tunnel dryer with inner width of 2.4meter. Whole production line adopts 7 lines of double-rail tunnel dryers. The heating source is residual/waste heat from the tunnel kiln. The smoking air feeding temperature and air volume will be adjusted through the air-adjustment-system, so as to ensure the drying quality of green bricks. Well-dried green bricks will be unloaded from drying cart and re-stacking on the kiln cart manually.
Tunnel kiln adopt large section with inner width of 4.6meter, it is designed as a flat ceiling structure with refractory bricks. Considering bricks can not have black center and patterns, the firing fuel source is major by inner-mixing-coal, outer-casting-coal as replenish, the heat should meet the firing technology requirement. This kiln is suitable for firing products with 1600-2600KJ/Kg.
Tunnel kiln has smoke-releasing system, recycling system, waste-heat recovery system, cooling system and pressure balancing system. This kiln has following features: Large section, high yield, small section temperature difference, good heat preservation effect. Meanwhile, the kiln auto-control system is equipped to ensure the baking heat parameters are stable, so the firing quality is guaranteed.