After the materials are aged in the homogenization silo for 7-15 days, the sludge, shale and water have undergone a sufficient fermentation reaction, and the moisture content is 15%-25%. On the belt conveyor, it is evenly conveyed into the double-shaft mixer through the box feeder to break up the agglomerates during aging, and the mixing is more uniform. The belt conveyor conveys the material into the buffer silo, and the buffer silo is equipped with a belt scale to measure the material and continuously and stably send it into the double-roller granulator for extrusion and granulation to produce cylindrical raw material particles, which are qualified After the raw material particles are rounded by the shaping machine, they are preheated and calcined in the rotary kiln through a belt conveyor with a large inclination angle. The unqualified materials in the roller granulation process and the shaping process are returned to the mixing and granulation system through the belt conveyor.
Due to the mismatch of output caused by the discontinuous operation of the half-bridge scraper reclaimer and the continuous operation of the double-shaft mixer, a box-type feeder is set between the two equipments, on the one hand, it is used to feed the double-shaft mixer stably, On the other hand, the material is temporarily stored. The stirring knife set at the discharge position of the box feeder also plays a role in breaking up the agglomeration generated during aging.
In order to prevent iron materials such as welding rods during construction, bolts and nuts falling from operating equipment from entering the counter-roll granulator and causing damage to the counter-roll granulator, an iron remover is installed at a position about 15cm parallel to the belt.
A buffer silo with a pressure sensor is set above the belt scale. On the one hand, the belt scale needs to feed continuously and evenly, and on the other hand, it measures the material level in the buffer silo and adjusts the feeding amount of the previous process in real time.
The function of the shaping machine is to remove the surface burrs and adhering materials of the raw meal particles from the double-roll granulator, and reduce the smoke and dust caused by the burrs and the adhering materials entering the rotary kiln for calcination.
The double-roll granulator requires the moisture content of the material to be 15%-25%. If the material fails to reach the required moisture content, water can be added to the twin-shaft mixer in the previous process. The roller skin of the counter-roll granulator can be replaced, which is helpful for customers to adjust the size of the raw material particles according to the actual needs.
The above is a brief description of the ceramsite mixing and material making process, and the addition, deletion, modification and deletion of equipment can be carried out according to actual needs.
