Asphalt Mixing Equipment Classification And Performance

Asphalt mixture mixing equipment is a factory-type complete equipment that mixes and mixes dry and heated aggregates, fillers and asphalt according to the design mixing ratio into a uniform mixture at a specified temperature. It is widely used in high-grade highways and cities Construction of roads, airports, docks, parking lots, etc. It is the first key equipment for asphalt pavement construction, and its performance directly affects the quality of asphalt pavement.

Usually asphalt mixing equipment has two types of batch and continuous. The continuous process is simple and the equipment is simplified. The intermittent forced mixing equipment, due to the secondary screening of aggregates, various components are measured in batches, forced stirring and mixing, which can reliably ensure gradation, and the measurement of powder and asphalt can also reach a very high accuracy; so mixing The quality of the asphalt mixture produced is good and can meet various construction requirements.

The main process characteristics of intermittent asphalt mixture mixing equipment are: various ingredients are measured in batches, which are put into the mixer for forced mixing according to the preset order, after the mixed product is discharged, the next cycle is carried out , To form a cyclic operation process. The so-called batch type refers to this mode of batch measurement and stirring production. Use a loader to shovel sand and gravel materials of different specifications into the corresponding cold storage bin; controlled by the inverter (the inverter parameters are set in advance according to the gradation type, output and mix ratio) After the volume of the belt feeder is measured, the Feeding belt conveyor and feeding belt conveyor are transported to the drying drum.

The drying drum of asphalt batch plants heats the sand and gravel to a certain temperature by countercurrent heating (the control system automatically adjusts the flame size of the burner). Due to the rotation of the drum, the sand and gravel are repeatedly lifted and dropped by the blades in the drum to form a material .The curtain enhances the heat exchange effect, and with the help of the inclination of the drum, the sand and stone materials continue to move forward while heating; after exiting from the drum outlet, together with the coarse powder collected by the gravity dust collector, it is lifted by the hot aggregate elevator. Discharge into the hot aggregate screening machine. The high-temperature dust-containing flue gas discharged from the drying drum first enters the gravity dust collector for preliminary purification through the first-level flue, and the collected powder with a particle size of 0.075mm or more is sent to the entrance of the hot aggregate elevator by the screw conveyor; then contains The dust flue gas enters the bag-type dust collector, and the filtered flue gas is directly discharged into the atmosphere by the induced draft fan. The dust recovered by the bag filter is sent to the recovered powder supply system for storage by the screw conveyor.

The hot aggregate of asphalt mixing plant sieve is divided into several specifications through a sieving machine, and flows into the corresponding hot material storage bin for storage. According to the set ratio, the aggregates of different specifications are batched into the stone metering bin in order of small to large, and accumulated; the hot asphalt from the asphalt supply system and the powder from the powder supply system are separately According to the set ratio, put into the respective measuring device to measure. After the weighing is completed, it is put into the mixing pot according to the order set in advance for forced mixing. The agitated finished product is discharged into the finished material lifting trolley, lifted and discharged by the hoisting machine into the finished product silo for storage, or directly discharged into the material dump truck.