For pulverizing bituminous coal, the core objectives in equipment selection are efficient preparation, stable control, and explosion-proof safety. Given the physical characteristics of bituminous coal (moderate grindability, high volatile matter content, and flammability) and its primary application as fuel powder (coal dust), the vertical mill (medium-speed mill) is currently the most suitable and mainstream choice.

Its core advantages are reflected in the following aspects:

1. High grinding efficiency with low energy consumption

Vertical mills employ the fluidized bed grinding principle, crushing coal layers on the grinding disc through roller compression, resulting in high energy utilization. System power consumption is approximately 20%-35% lower than traditional ball mills. Additionally, its robust drying capability allows direct utilization of kiln exhaust gas within the mill to simultaneously dry raw coal (accommodating moisture content of 8%-15%), eliminating the need for a separate drying system and delivering significant energy savings.

2. System Safety and Reliability with Flexible Particle Size Adjustment

The mill operates smoothly within a relatively sealed internal space, facilitating the use of inert gases (e.g., flue gas, nitrogen) as a protective atmosphere. This effectively reduces oxygen content, preventing coal dust explosion risks at the source. The integrated dynamic classifier allows convenient and rapid control of coal powder fineness (typically targeting 80 mesh (R90) or finer) by adjusting rotational speed. This ensures compliance with burner-specific particle size requirements and guarantees combustion efficiency.

3. High Environmental Protection and Automation Levels

The entire system operates under negative pressure with excellent sealing. Combined with a high-efficiency pulse-jet baghouse dust collector, it enables clean production with low dust emissions. The equipment integrates seamlessly into fully automated central control systems (DCS/PLC), enabling one-button start/stop, interlock control, online monitoring, and intelligent adjustment. This ensures stable operation while significantly reducing manual intervention and safety risks.