The milled raw meal is stored in the raw meal warehouse. Generally, 2~3 warehouses are set up, which can be discharged individually or with multiple warehouses.

The raw meal powder is fed into a small silo, and a screw metering device or a speed-adjusting belt weighing device is installed under the silo to measure the amount of raw meal. The raw meal enters the disc ball making machine. At the same time, the flow meter can be used to measure the amount of water, and the water is sprayed into the disc ball making machine by the pipeline pump. During the rotation of the ball making machine, pellets of various particle sizes can be made. After the material balls are out of the tray, they are sent to the screening device by the belt conveyor, the qualified ones enter the rotary kiln, and the oversized ones are returned to the raw material grinding process. According to the output of different kilns, it can be equipped with different numbers of disc-type ball making machines (ball-forming discs).

The ball making system has a high degree of automation and a continuous process. After being equipped with a bag filter, it can achieve the job dust compliance and purify the job environment.

5. Calcination:

The pellets enter the rotary kiln with a certain inclination for calcination. With the rotation of the rotary kiln, the pellets roll toward the kiln head, and at the same time, the coal powder is injected into the kiln from the kiln head for combustion, and the pellets are calcined in the rotary kiln to the strength Very high ceramsite sand.

The pulverized coal burner can use a single air duct coal injection pipe, which is simple and reliable, and has a high primary air volume; it can also use a multi-air duct burner, and the primary air volume can be reduced to 8% of the air volume required for pulverized coal combustion, which improves the secondary kiln entry. Air volume, energy saving effect is remarkable. The multi-channel burner is divided into outer axial flow air, coal air, inner axial flow air, etc. The flame shape is very easy to adjust.

The measurement of pulverized coal can be carried out by a rotor-type weighing scale or a Coriolis force scale, which can precisely control the amount of coal and stabilize the thermal system in the kiln.

6. Pulverized coal preparation:

The pulverized coal can be prepared by ball mill or vertical mill, and hot air can be extracted from the kiln hood to dry the pulverized coal. The fineness of the pulverized coal can be adjusted arbitrarily by using the dynamic separator, which provides conditions for the full combustion of the pulverized coal.

The cooling of ceramsite sand generally uses a rotary cooler, which is simple and reliable. The secondary air of the cooler is completely fed into the kiln, and the use of multi-channel burners can save a lot of energy. The temperature of the ceramsite sand coming out of the cooler is very low and can be picked up by hand.

8. Screening:

The ceramsite sand from the cooler can be directly transported to the multi-stage vibrating screen, and divided into multiple particle size grades as required.

Specifications of ceramsite sand

Type I 0.45-0.9mm (20-40 mesh) high strength and medium density

Type II 0.9-1.25mm (16-20 mesh) high strength and medium density

Type III 1.0-1.70mm (12-18 mesh) high strength and medium density

Type IV 0.224-0.65mm (40 mesh-60 mesh) high strength and medium density