Mobile continuous asphalt mixing plants will serve as an “efficiency engine” in the road construction sector

Asphalt mixing plant is a very practical engineering machinery. Especially in the road construction process, it plays an irreplaceable role. Due to its importance, in addition to ensuring its own quality, the use and maintenance of the equipment must be carried out normally. Let’s learn about the daily maintenance requirements of asphalt mixing plants.

After use, asphalt mixing equipment needs to be disassembled, cleaned, and maintained before it can be saved for next use. Not only is the disassembly process of the equipment important, but the previous preparation work also has a greater impact, so it cannot be neglected. Please pay attention to the detailed introduction below for specific content.

The drying cylinder is a cylindrical device in asphalt concrete mixing equipment specifically designed for heating and drying aggregates. Proper use and maintenance of the drying cylinder can maximize its performance, extend its service life, and reduce operating costs. Below are the specific operating methods.
1. Emphasize Routine Inspections
The asphalt mixing equipment drying cylinder has been tested and inspected before leaving the factory, but it will be subjected to bumps and vibrations during transportation to the construction site. A comprehensive inspection should be performed before use: check if the bolts are tightened; if the key pins are reliably driven in; if the drive unit is adjusted according to the manufacturer’s instructions; if the pipe connections are correct and the pipe joints are safe and reliable; if the entire machine is thoroughly lubricated; start the motor and check if the machine parts can rotate smoothly in the correct direction; if the pressure gauge is working properly and the safety valve is adjusted to the correct pressure; if the burner ignition mechanism is working properly and the valves are open.
2. Correct Operating Methods
After starting the machine, it is recommended to operate the equipment manually at the beginning. After reaching the specified production capacity and unloading temperature, then switch to automatic control mode. Aggregates should be dried and have a consistent moisture content to maintain a constant temperature as they flow through the drying drum. If the aggregates supplied to the drying drum change frequently, and the moisture content of each batch varies, the burners should be adjusted regularly to compensate for these variations.
Aggregates directly from crushed stone have an almost constant moisture content, while aggregates from open stockpiles have a higher moisture content, and the moisture content varies greatly between different stockpiles. Therefore, it is best to source aggregates from the same source.

Mobile Cold Aggregate Feeding System

Today, the editor of our large-scale (removable) asphalt mixing plant will introduce the daily maintenance of asphalt mixing equipment. Interested parties, join us for a discussion!
Before starting the machine, clear any loose materials near the conveyor belt. Start the machine with no load, and only operate it under load after the motor is operating normally. During loaded operation, a dedicated person should inspect the equipment, adjust the belts promptly, and observe the equipment’s operating status for any unusual noises or abnormalities, as well as ensure that exposed instrument displays are functioning properly.
If any abnormalities are detected, the cause should be promptly identified and corrected. The equipment should be inspected and maintained after each shift. Lubricate hot moving parts after each shift. Clean the air filter and air-water separator filter in the air compressor. Check the oil level and quality in the air compressor and reducer. Adjust the tension of the belts and chains, and replace them if necessary. Clean dust from the dust collector and any debris and waste on the site to keep it clean and tidy. Problems identified during inspections should be completely corrected after the shift, and operational records should be kept to ensure the overall condition of the equipment.

With increasingly stringent environmental protection policies, asphalt mixing stations face severe challenges such as excessive dust and exhaust gas emissions. How to achieve standard production through efficient and environmentally friendly transformation while controlling costs? This article will reveal three core transformation plans to help mixing stations achieve a direct reduction of more than 80% in emissions, combining economy and compliance!
1. Dust control: Upgrade pulse bag dust removal system
Traditional dust removal equipment is difficult to cope with high humidity and high viscosity dust in asphalt stations, which can easily cause filter bags to compact. The transformation plan includes:
Filter material upgrade: Use oil-proof and waterproof coated filter bags, which can withstand 240℃ high-temperature asphalt flue gas and extend the service life by 2 times.
Intelligent cleaning: Equipped with a 0.5MPa high-pressure pulse backflush device, the cleaning frequency is automatically adjusted according to the pressure difference, and the dust capture efficiency exceeds 99%.
Seal transformation: Install double-layer soft curtain seals on dust-raising points such as silos and conveyor belts to reduce unorganized emissions.
Transformation effect: dust emission concentration dropped from 100mg/m3 to below 10mg/m3, which is better than the national standard.
With increasingly stringent environmental protection policies, asphalt mixing plants face severe challenges such as excessive dust and exhaust gas emissions. How to achieve standard production through efficient and environmentally friendly transformation while controlling costs? This article will reveal three core transformation solutions to help mixing stations achieve a direct reduction of more than 80% in emissions, combining economy and compliance!

Many people think that since both asphalt mixing plants and asphalt mixing plants are equipment for producing asphalt, there should be no difference between them, even if there is, it is only in appearance and volume. However, asphalt mixing plants and asphalt mixing plants are different in even their basic structure and function.
First, let me introduce the basic structure of an asphalt mixing plant, which includes five major components: material supply system, metering system, mixing system, and electrical control system. In comparison, the structure of an asphalt mixing plant is simpler, without so many components, so its operation and maintenance will be simpler.

Speaking of asphalt mixing plants, we are not unfamiliar with them. This is a unit equipment specially used for asphalt mixing. In fact, what we really lack understanding of is its gas system. Even the accumulated failures that often occur in the gas system of asphalt mixing plants are not very clear. Facts have proved that only by properly maintaining the various systems of the equipment can efficient production and good benefits be achieved.
The following are four types of gas system failures that often occur in asphalt mixing plants. Let’s analyze the causes of the problems behind the failures one by one.

Emulsion bitumen equipment has stable product quality, closed material transmission, high degree of automation and civilized production, and is easy to standardize management. The double-mill configuration can be used to produce modified emulsified asphalt.
At present, emulsified asphalt equipment is widely used in new technologies and processes for preventive maintenance, such as fog seal, slurry seal, micro-surfacing, cold regeneration, crushed stone seal, cold mix and cold patch materials.
Emulsion bitumen equipment is an emulsion at room temperature formed by dispersing asphalt into the water phase. It is a new material for the use of elements. Compared with traditional hot asphalt, it saves more than 50% of energy and 10%-20% of asphalt, and has little pollution. The biggest feature of emulsified asphalt is that it can be stored at room temperature. It does not need to be heated during spraying and mixing, nor does it need to heat the stone. Therefore, it greatly simplifies the construction, avoids burns and scalds caused by hot asphalt, and avoids the fumigation of asphalt steam when paving high-temperature mixtures. It is very popular among road maintenance workers.

Asphalt mixing plants are highly professional equipment with complex systems. It is inevitable that some failures will occur during use. So, what are the common hardware failures of asphalt mixing plants? Do you know?
(I) Because its system is relatively complex, when different components have problems, the problems caused may be different. If during the operation, it is found that the material addition of each silo is inaccurate, this problem may be due to the failure of the sensor of the asphalt mixing plant. At this time, the machine should be stopped for inspection and replaced with a new sensor if necessary. It may also be caused by the jamming of the scale bar. At this time, foreign objects should be removed in time.

During the asphalt mixing process, we generally use complete sets of asphalt mixing plant equipment to carry out mixing operations. What are the benefits of using complete sets of equipment? Let’s take a look.
1. High efficiency
Complete sets of equipment can help improve production efficiency and ensure production quality.
2. Ensure quality
When mixing asphalt, a ratio will be set. For asphalt liquid used in different occasions, its ratio control has strict requirements. Only by ensuring its mixing method and mixing time can we ensure whether the asphalt liquid meets the production requirements. One of the benefits of using complete sets of equipment in the mixing station is that the quality can be effectively controlled.
3. Can be sampled
After the asphalt mixing plant is mixed, the relevant quality inspection personnel can conduct sample inspections to ensure that the mixed asphalt liquid meets the use requirements.
Using complete sets of equipment in the asphalt mixing plant can more conveniently control the mixing time and the order of feeding, and then effectively sample inspection, so as to ensure that the quality meets the construction requirements.

Asphalt mixing stations have always been criticized for pollution due to the emission of harmful smoke and dust and high energy consumption. Asphalt mixing stations with high pollution, high energy consumption and unqualified environmental protection are obviously incompatible with modern urban development. Under the high pressure of environmental protection supervision, how can asphalt mixing stations pass environmental protection inspections smoothly? Can asphalt mixing stations be low-carbon, energy-saving, and environmentally friendly, and achieve environmental protection upgrades?
As a professional asphalt mixing equipment R&D and manufacturer, how to make asphalt mixing stations more environmentally friendly and energy-saving has always been the direction of Nanfang Road Machinery’s efforts. In response to the pollution problems faced by asphalt mixing stations, Nanfang Road Machinery has launched environmentally friendly asphalt mixing equipment with strict environmental protection standards.

Determining the material is a necessary stage in the design process of asphalt mixing equipment, and it is also one of the most critical links, because the material will be directly related to the use effect and service life of the entire equipment. Generally, when we determine the machine material, we usually base it on the characteristics of the working medium, and the same is certainly true for asphalt mixing equipment.

In general, the development of my country’s asphalt mixing plant industry is very rapid. In the ton segment, it quickly occupied most of the market share. And with the advancement of technology, it can basically meet the current development needs. However, the total demand for some large-scale asphalt mixing plants has not increased or decreased. What are the reasons?
If we analyze from multiple angles, it is not difficult to find that these reasons are also some of the problems faced by my country’s current asphalt mixing plantindustry. These problems are summarized as follows:

Current highway projects are generally large-investment projects. When carrying out actual project construction, it is very necessary to control the cost of the project. The production cost control and management of asphalt mixing stations in highway projects plays a huge role in controlling the cost of the entire highway project, because the main expenses of highway projects are concentrated on the mixing stations, and almost all the equipment used in highway projects Materials are closely related to the mixing station.

The site selection of the asphalt mixing station should follow three principles. Let’s take a look:
1. When selecting the site for the asphalt mixing station in the early stage of construction, the construction party should pay attention to the line direction of the construction site, because the line direction of the construction site will directly affect the quality of the mixed asphalt. Asphalt is an important material used for road and engineering construction. If the quality is poor, it will inevitably have a serious impact on the quality and safety of the entire project. Therefore, when selecting the site, it must be considered in many aspects, and meet the on-site requirements, and confirm the location of the mixing station according to the drawings.
2. Secondly, it is necessary to have a full understanding and grasp of the basic elements of the asphalt mixing station construction, such as whether water and electricity can be supplied normally, or whether the size of the land is sufficient to build an asphalt mixing station.
3. Since the use of asphalt mixing stations belongs to mechanized construction, there will inevitably be dust, noise and other pollution problems during the operation. It can be seen that when selecting the site, it must be kept as far away as possible from residential areas, schools or farms to avoid a greater impact on the surrounding environment.

Dust removal system of asphalt mixing plant

Asphalt mixing plant equipment is mainly composed of batching system, drying system, ignition system, hot material lifting, vibrating screen, hot material storage bin, weighing mixing system, asphalt supply system, granular material supply system, dust removal system, finished product hopper and automatic control system.
Components:
⑴ Grading machine
⑵ Vibrating screen
⑶ Belt vibrating feeder
⑷ Granular material belt conveyor
⑸ Drying mixing drum;
⑹ Coal powder burner
⑺ Dust removal equipment
⑻ Bucket elevator
⑼ Finished product hopper
⑽ Asphalt supply system;
⑾ Distribution station
⑿ Automatic control system.

Installing a large asphalt mixing plant is indeed a complex project. Let me outline the key steps and precautions for you:
I. Pre-Installation Preparation
Site Selection and Geological Assessment: Prioritize areas far from residential areas and farmland to avoid construction interference.
Foundation Type Selection Based on Geological Conditions: For existing foundations, the bottom layer needs to be compacted; for soft soil, reinforce with piling piles or vibratory casing.
Equipment Debugging and Inspection: Conduct a comprehensive inspection of the equipment before installation, ensuring no scratches or wear, and complete bearing lubrication.
Technicians must carefully inspect the electrical system to eliminate potential safety hazards.
II. Foundation Construction
On-Site Foundation Treatment: After excavation, properly treat the bottom layer, paying attention to the foundation concrete construction procedure.
Ensure the main building and the dry aggregate portion of the foundation are poured on the same horizontal plane to reduce resonance hazards.
Soft Soil Foundation Treatment: After layout and excavation, reinforce the bottom of the foundation using piling piles or vibratory casing.
Monitor foundation cracking and settlement to ensure bearing capacity.

Mobile continuous asphalt mixing plants, acting as “efficiency engines” in road construction, are driving the industry towards intelligent and green development through technological upgrades and customized services. Wucheng County Luhong Road Construction Machinery Co., Ltd., with its technical strength and industry reputation, has become a trusted choice for many engineering companies. Whether it’s a maintenance unit seeking efficient construction or an emergency repair team requiring flexible deployment, choosing a technically proficient and reliable manufacturer is a crucial step in ensuring project quality and efficiency.
In the field of mobile continuous asphalt mixing plants, Wucheng County Luhong Road Construction Machinery Co., Ltd., with its profound technical accumulation and innovation capabilities, has become a representative enterprise in the industry. The company has focused on the research and development and manufacturing of road construction machinery for over twenty years, with products covering three major series: mobile, stationary, and recyclable. Among them, mobile continuous mixing plants, with “high efficiency, environmental protection, and intelligence” as their core competitiveness, are widely used in many key projects across the country.

The development prospects of asphalt mixing plants are very good, and the product competition on the market is also very fierce. When the equipment is used, uneven wear of the supporting wheels and wheel rails often occurs, and sometimes there are some abnormal noises and edge gnawing. The main reason is that after the asphalt mixing station has been working for a period of time, the drying cylinder is exposed to high temperature and friction occurs between the supporting wheel and the wheel rail.
Under the action of drying materials in an asphalt mixing station, the equipment will vibrate violently, which will directly lead to improper adjustment of the gap between the wheel rail and the supporting wheel, or mutual interference between the two. The position is skewed, so the operator needs to add grease to the surface contact positions of the supporting wheel and the calibrating wheel rail after every day’s work.

Bitumen, a black or brown petroleum-like material, has a viscosity ranging from a viscous liquid to a glassy solid. It can be obtained as a residue separated from natural deposits. Bitumen consists of hydrogen and carbon compounds with small amounts of nitrogen, sulfur and oxygen. The preparation of mixed materials for mixing with asphalt is done in several steps:
Prediction: According to the asphalt recipe, the individual components of the aggregate are weighed. Usually this is done using a belt scale, since the material must go to the next step in a continuous flow.

asphalt mixture mixer

Asphalt mixing plants—also commonly referred to as asphalt mixing stations or hot-mix asphalt production equipment—are specialized industrial facilities used in road infrastructure construction. They primarily produce high-quality hot-mix asphalt mixtures and are widely used in various pavement projects, including highways, municipal roads, and airports. The equipment combines aggregates such as crushed stone, sand, and mineral powder with asphalt binder, mixing them in precise proportions under constant high-temperature conditions to produce wear-resistant, flexible, and long-lasting pavement materials.

For construction contractors, project managers, and infrastructure professionals, a thorough understanding of the performance, classifications, and key operating principles of asphalt mixing plants not only ensures a stable supply of asphalt mix and helps control construction costs but also fundamentally enhances the overall quality of pavement projects. This article will systematically explain the functions, operational processes, core components, equipment classifications, scope of application, advantages, and key selection criteria of asphalt mixing plants, providing a comprehensive overview of asphalt mixing equipment.

drum asphalt mixing plant

Asphalt mixing plant is a very practical engineering machinery. Especially in the road construction process, it plays an irreplaceable role. Due to its importance, in addition to ensuring its own quality, the use and maintenance of the equipment must be carried out normally. Let’s learn about the daily maintenance requirements of asphalt mixing plants.

[1]. Composition of intermittent asphalt mixing plant
The intermittent asphalt mixing plant mainly consists of cold material silo, cold material distribution system, cold material conveying system, combustion and drying system, ventilation and dust removal system, hot material elevator, vibrating screen, hot material silo, powder conveying system and asphalt conveying system. System, metering system, mixing cylinder, control system, finished material transportation and storage system, asphalt heating and insulation system, etc.
2. Discussing the phenomenon of warehouse cascading in asphalt concrete mixing plants
2.1 First, let’s introduce the structure and principle of vibrating screen. The main components include: RetentionRubber, SupportTube, vibrating screen drive system and supporting electrical components
The working principle is introduced as follows: hot aggregate is sent to the vibrating screen through the hot aggregate elevator, and the hot aggregate is vibrated and screened by the vibrating screen. Stones of different specifications enter their corresponding hot aggregate bins through the screen and cannot pass through the geotechnical work. The super-sized particles from the cloth screen enter the overflow bin and are sent out.

We know that the first priority in production is to ensure safety. In the process of operating equipment, staff must always pay attention to using the correct operating methods. Regarding the asphalt mixing plant, it is used to produce asphalt mixtures, modified asphalt mixtures, and colored asphalt mixtures to meet the needs of highways, graded highways, municipal roads, airports, etc.