Asphalt Batch Type Hot Mix Plant

Asphalt batch type hot mix plant is a kind of equipment used to produce asphalt mixture, which is widely used in road construction and maintenance. Intermittent hot mix asphalt mixing plant is one of the core equipment for producing asphalt concrete.
 

Working principle: adopt batch mixing process, each time the raw materials are put into the mixing cylinder according to the set proportion, and the finished mixture is output after heating, drying, mixing and other steps. Its specific process flow is cold material metering → drying and heating → hot material screening → batching metering → forced mixing → finished product output.
 

Structural composition of batch type hot mix plant:
- Cold material supply system: usually composed of multiple cold material bins and speed-adjustable belt conveyors, used to store and supply cold aggregates of different specifications, and can accurately control the supply amount of cold materials according to production needs.
- Drying and heating system: mainly includes drying drums and burners, and the burners generate high-temperature flames to heat and dry the cold aggregates entering the drying drum to remove moisture from the aggregates.
- Hot material lifting and screening system: The hot aggregates are transported to the vibrating screen through the elevator for secondary screening, and they are divided into different specifications according to the particle size and stored in the corresponding hot material bins.
- Asphalt supply system: It consists of asphalt storage tank, asphalt pump, asphalt heating device and asphalt metering device, etc. It is responsible for heating asphalt to the appropriate temperature and accurately measuring it before transporting it to the mixing tank.
- Mixing system: It is the core component of the intermittent hot mix asphalt mixing plant. It generally adopts a forced mixer. Through the rotation of the mixing blades, raw materials such as aggregates, asphalt and mineral powder are fully mixed and evenly mixed to form a high-quality asphalt mixture.
- Storage and discharge system: It includes finished product silos and discharge devices, which are used to store and discharge finished asphalt mixtures so that they can be transported to the construction site.
- Electrical control system: It adopts advanced PLC control system to automatically control and monitor the entire production process, realize functions such as precise metering, sequential operation, and fault alarm, and ensure the stability and efficiency of the production process.

Compared with continuous asphalt mixing plants, batch type asphalt mixing plants work in batches according to demand, and usually have the following characteristics:
- Production method:
In each mixing cycle, the asphalt batch mix plant will add the required aggregates, asphalt and other additives to the mixer in a certain proportion for mixing, and then unload after completion.
- Control system:
Modern batch type hot mix asphalt plants are usually equipped with advanced automatic control systems that can monitor and adjust the production process in real time to improve production efficiency and product quality.
- Environmentally friendly design:
Many new asphalt mixing plants are designed with environmental protection factors in mind and are equipped with dust removal and exhaust gas treatment equipment to reduce the impact on the environment.
- Scope of application:
Suitable for small and medium-sized asphalt mixture production, especially in situations where frequent formula changes or production of different types of asphalt mixtures are required.
- Accurate quality control:
The mixing time is highly controllable, which can ensure that asphalt and aggregate are fully and evenly mixed, the grading accuracy can reach 0.5%, the asphalt dosage is stable, and high-quality asphalt mixtures can be produced to meet the requirements of high-grade highways, airport runways and other projects with extremely high requirements for mixture quality.
- High production flexibility:
The ratio of raw materials such as aggregates, asphalt, and mineral powder can be flexibly adjusted according to different project requirements to adapt to various construction situations, such as emergency repairs, recycled material blending, etc. The production scale can also be controlled by adjusting the number and frequency of production batches, which is suitable for projects with different engineering volumes.
- Strong equipment reliability:
Although the structure is relatively complex, after long-term development and improvement, the various components and systems of the batch type hot mix asphalt mixing plant have high reliability and can operate stably in harsh working environments. At the same time, the equipment is relatively convenient for maintenance and easy to repair and replace parts.
 

Application scenarios of asphalt batch type hot mixing plant:
- High-grade highway construction:
Such as expressways and first-class highways, the quality and performance of asphalt mixtures are strictly required. Asphalt batch type hot mix plant can provide precise mix ratios and high-quality mixtures to ensure that the road surface flatness, durability and skid resistance meet the requirements.
- Urban road construction:
Urban roads have large traffic flows and high requirements for the quality and aesthetics of the road surface. Batch type hot mix asphalt mixing plants can produce asphalt mixtures suitable for different sections and traffic conditions according to the characteristics of urban roads, such as anti-rutting mixtures for main roads and colored asphalt mixtures for sidewalks.
- Airport runway construction:
Airport runways need to withstand the huge loads and frequent takeoffs and landings of aircraft, and have extremely high requirements for the high temperature stability, skid resistance and durability of asphalt mixtures. Intermittent hot-mix asphalt mixing plants can strictly control the quality of the mixture and meet the construction requirements of airport runways.
 

Environmental protection and energy-saving measures
- Dust removal system:
Equipped with high-efficiency dust removal equipment, such as pulse bag dust collectors, cyclone dust collectors, etc., it can effectively collect dust generated during the production process, reduce dust emissions, and reduce environmental pollution.
- Asphalt fume treatment:
A special asphalt fume purification device is used to treat the asphalt fume generated during asphalt heating, transportation and mixing, remove harmful substances such as benzopyrene and sulfur dioxide, and reduce air pollution.
- Energy-saving technology application:
Some advanced asphalt batch type hot mix plants use energy-saving drying drum design, heat recovery technology, etc., which can effectively reduce energy consumption and improve energy utilization efficiency.