Powdered coal is the primary fuel in modern asphalt mixtures. Previously, heavy oil was used to mix with asphalt, but heavy oil is expensive and corrosive. While natural gas is a clean energy source, its supply is limited by geographical constraints and its high fuel cost. Therefore, powdered coal has replaced it in asphalt mixing plants.
Using powdered coal in asphalt concrete can save 70%–80% on fuel costs, and its performance can reach the level of high-intensity short-flame oil devices. Coal is widely used in industry and daily life. With the improvement of people's living standards, the demand for energy will increase, and energy conservation and other related issues have attracted widespread attention in engineering construction.
The main function of powdered coal in asphalt mixing plants is to provide heat energy by burning it to heat the asphalt materials. Powdered coal is an energy source, its main components being carbon, hydrogen, oxygen, sulfur, and other elements. When powdered coal is mixed with air under certain conditions, it releases heat energy after ignition and combustion, which can be used for heating operations in the asphalt plant.

Pulverized Coal
Specific Application Steps and Equipment of Pulverized Coal in Asphalt Mixing Plants:
Pulverized Coal Transportation and Combustion: Pulverized coal is transported to the hot furnace of the asphalt plant, ignited, and burned, transferring heat energy to the asphalt material to bring it to the required temperature.
Combustion Equipment: Specialized burners or furnaces are typically used to burn pulverized coal, providing a stable heat output.
Advantages of Pulverized Coal in Asphalt Mixing Plants:
Cost-Efficiency: Pulverized coal is relatively inexpensive, reducing the operating costs of the asphalt plant.
High-Efficiency Combustion: Pulverized coal has high combustion efficiency, providing a more stable heat output.
Environmental Advantages: The combustion of pulverized coal produces relatively few exhaust emissions, which is beneficial to environmental protection.
Environmental and Safety Measures for Pulverized Coal in Asphalt Mixing Plants:
Exhaust Gas Treatment: Exhaust gases generated during combustion need to be properly treated to reduce their impact on the environment.
Safety Measures: Ensure the safe operation of the combustion equipment to prevent fires and other safety accidents.