Rotary kilnsare widely used in building materials, chemical, environmental protectionindustries, such as cement, lime, ceramsite, white fluorite, medical wasteincineration, etc.
The rotarykiln is installed obliquely, the high end is the kiln tail, and the low end isthe kiln head. The material enters from the kiln end and exits from the kilnhead; the rotary kiln is generally counter-current, with fuel entering from thekiln head and flue gas exiting from the kiln end.
Rotary kilnbarrel rotation generally requires speed regulation, using variable frequencymotor or DC motor.
The sealingform of rotary kiln generally adopts scale seal and compound seal.
The kiln headcover is located at the end of the kiln head, and is provided with fire viewingholes, burner holes, inspection doors, temperature measurement and pressuremeasurement holes, etc. on it.
The burnerhole is not in the center of the rotary kiln, but is set in the direction closeto the material according to the direction of rotation of the kiln. Forexample, when the rotary kiln rotates clockwise, the material is concentratedon the lower left, and the burner hole is also opened in the center near thelower left square.
Rotary kilnshell generally adopts Q235B or Q255A material.
Because of theirregular shape of the kiln head and the end of the kiln, refractory brickscannot be built. Generally, burning injection is used. A retaining ring is usedbetween the refractory brick and the burning injection to prevent therefractory bricks from falling off at the contact point.
The kiln headguard plate is installed at the kiln head. The main consideration is that thematerial is in a high temperature state when discharged to avoid contact withthe cylinder. On the other hand, it is considered that the guard plate is wornby frequent discharge. Generally, wear-resistant High temperature resistantmaterial.
The supportingwheel/retaining wheel device is set at least with 2 gears, and there are 3 ormore gears. The supporting wheel device is usually set near the end of thekiln. Our supporting wheels use mechanical wheels below Ø3.2m, and hydraulicwheels above Ø3.2m.
Because thekiln temperature is relatively high when the rotary kiln is overhauled or shutdown, stopping the kiln directly will cause the cylinder to sag and deformunder the action of gravity. It is necessary to use auxiliary transmission toslowly rotate and cool down to support it to prevent deformation.
Diesel enginesare generally used for auxiliary transmission to prevent unexpected situationssuch as power outages from causing unavailability.
The rotarykiln moves up and down when it is rotating, and the up and down cycle should becontrolled at about 8 hours.