Asphalt mixing plants are core equipment in road construction and maintenance, and their stable and efficient operation is inseparable from a series of matching accessory equipment. These accessory devices cover functions such as dust removal, material storage, grading, heating, recycling, and fuel processing, which not only ensure the quality of asphalt mixture production but also improve production efficiency, reduce environmental pollution, and meet the diverse needs of different construction scenarios. The following are the most commonly used accessory equipment for asphalt mixing plants and their core roles in the production process. Dust removal equipment is an essential part of asphalt mixing plants to meet environmental protection requirements, including bag dusting and water dust removal. Bag dusting equipment is widely used for its high dust removal efficiency. It captures and filters dust generated during the mixing and drying process in a dry state, effectively reducing dust emissions and avoiding air pollution. Water dust removal, on the other hand, uses water as the medium to absorb and settle dust, which is suitable for some specific working conditions and can also play a role in cooling while dedusting. Both types of dust removal equipment help asphalt mixing plants comply with environmental protection standards and create a cleaner production environment. Material storage and handling accessory equipment mainly include the finished material storage warehouse and asphalt bucket machine. The finished material storage warehouse is used to store the produced asphalt mixture, which can effectively keep the mixture at a suitable temperature and prevent it from caking or deteriorating, ensuring the continuity of subsequent construction operations. The asphalt bucket machine is a key device for asphalt transportation and feeding. It can accurately transport asphalt to the designated position in the mixing system, ensuring the stability and accuracy of asphalt supply, which is crucial for controlling the proportion of asphalt mixture and improving product quality. Grading and heating equipment, such as grading machine and fast-heating asphalt tank, play an important role in optimizing the performance of asphalt mixture. The grading machine is responsible for classifying aggregates according to particle size, ensuring that the aggregate gradation meets the design requirements of asphalt mixture, which directly affects the strength and durability of the final pavement. The fast-heating asphalt tank can quickly heat asphalt to the required temperature for mixing, improving the efficiency of asphalt melting and shortening the production cycle. It also has the function of heat preservation to avoid energy waste caused by repeated heating. With the promotion of green construction concepts, the asphalt recycled material crushing and screening system has become an increasingly important accessory equipment. This system can crush and screen waste asphalt pavement materials, process them into recyclable aggregates, and reuse them in the production of new asphalt mixture. This not only reduces the waste of resources and environmental pollution but also lowers the production cost of asphalt mixture, in line with the development trend of energy conservation and emission reduction in the construction industry. For asphalt mixing plants that use coal as fuel, coal crusher and coal mill are essential supporting equipment. The coal crusher crushes large pieces of coal into small particles of appropriate size, facilitating subsequent combustion and processing. The coal mill further grinds the crushed coal into fine powder, which can fully burn in the combustion system, improve fuel utilization efficiency, and reduce fuel consumption and pollutant emissions. These two devices ensure the stable supply and efficient utilization of fuel, providing reliable power support for the normal operation of asphalt mixing plants. In summary, the above nine types of accessory equipment are closely related to the entire production process of asphalt mixing plants. Each type of equipment undertakes unique functions and plays an irreplaceable role in improving production efficiency, ensuring product quality, and protecting the environment. Choosing suitable, high-quality accessory equipment is of great significance for the stable operation and long-term development of asphalt mixing plants, and is also an important guarantee for promoting the high-quality development of the road construction industry.