Asphalt concrete pavement has many advantages such as good driving comfort, excellent performance, fast construction speed and low maintenance cost. Therefore, most of the highways of all levels use asphalt pavement. Hot mixed asphalt mix is the main method and the key link of the current asphalt pavement construction. It mainly relies on advanced mixing equipment – asphalt mixing plant to fully heat and mix the high-quality composite materials through scientific and reasonable configuration to achieve accurate and even road mixture materials. Since the asphalt mixture is so useful, it is necessary to have a deep understanding of the production process of asphalt mixture. Of course, this is also the basic requirement for people in the asphalt industry. This article will give a detailed description below. Fore more knowledge of asphalt plant, you can ask itsasphaltplant for help.
How does an asphalt Plant Work
After the central control room sends the start-up command, the cold material in the cold bin is conveyed to the drying drum by the belt conveyor. The dried aggregate is conveyed to the vibrating screen by the hot material elevator for screening, and the screened aggregate falls into each hot bin room. Each aggregate and powder falls into its own weighing bucket from its own chamber door and is measured by an electronic scale, then put into the mixing tank, and the weighed hot asphalt is sprayed into the mixing tank; After all kinds of mixtures are fully mixed, the finished asphalt mixture is formed and unloaded into the hopper car; The feeding hopper car is unloaded into the finished asphalt mixture storage bin through the track, and finally the finished materials are placed on the transport truck through the unloading gate. The transportation, drying and screening of aggregate, the transportation of powder and asphalt are continuous, while the weighing of aggregate, powder and asphalt, the mixing of mixture and the transportation of finished materials by the hopper truck are carried out periodically. Above is how does an asphalt plant mix materials.
Disassembly Analysis of Asphalt Production Process
The asphalt concrete mixing plant is mainly composed of cold material feeding unit, drying and heating unit, mixing unit, dust removal unit, asphalt supply unit, mineral powder supply unit, finished material storage unit and central control room. Each unit is installed on a separate foundation and driven by a motor.
Cold Material Feeding Unit: The cold material supply part is mainly composed of cold material bin, horizontal conveyor belt and inclined conveyor belt.
Drying and Heating Unit: Cold material heating mainly refers to the heating of the drying cylinder, which is the place where the cold aggregate is heated, and its heat source is the burner at the front end of the drying cylinder.
Mixing Unit: The main building is mainly composed of vibrating screen, hot bin, electronic scale and mixing cylinder. The hot aggregate in the production process is sent to the vibrating screen from the discharge port of the drying cylinder through the hot aggregate elevator to realize the continuous production process.
Dust Removal Unit: Dust removal mainly consists of gravity dust removal, bag dust removal, and treatment of waste powder discharged from the bag. The process of dust removal is to remove the dust and powder outside the aggregate during the production process. Gravity dust removal is to recycle some large particles in the dust, and the waste powder that cannot be recycled will be discharged through bag dust removal, enter a small mixing tank through a spiral, and at the same time, spray water for mixing to achieve the effect of dust removal. This is also a measure of environmental protection.
Asphalt Supply Unit: Asphalt is pumped from the asphalt tank to the asphalt scale of the main tower through the asphalt pump to complete the weighing of asphalt.
Mineral Powder Supply Unit: The powder is transported from the powder tank to the powder weighing scale of the main building through the screw, and the weighed powder is transported to the mixing cylinder to complete the powder supply.
Finished Material Storage Unit: It is that the mixed finished materials are unloaded into the finished asphalt mixture storage bin through the track of the hopper car, and finally the finished materials are placed on the hopper car through the unloading gate.
Central Control Room: This part is the core component of asphalt mixing station.