Collision Energy Analysis within the Vertical Shaft Impact Crusher Based on the Computational Fluid Dynamics-Discrete...

Area of Science:

• Mechanical Engineering
• Materials Science
• Computational Fluid Dynamics

Background:

• Particle collisions in vertical shaft impact crushers are crucial for material breakage and energy dissipation.
• Understanding collision energy distribution is key to optimizing crusher efficiency and energy consumption.

Purpose of the Study:

• To investigate the regional distribution of collision energy, frequency, and energy spectrum of particles in a VSI crusher.
• To provide a theoretical foundation for the energy-efficient design of vertical shaft impact crushers.

Main Methods:

• A computational fluid dynamics (CFD) and discrete element method (DEM) coupling model was developed to simulate gas-solid interactions.
• Experimental validation was performed using a PL8500 VSI crusher, comparing simulation results with empirical data.

Main Results:

• The fluid-solid coupling model accurately predicts collision energy distribution within the crushing chamber.
• Higher rotational speeds increase collision frequency and energy, promoting material breakage.
• Increased feed rate minimally impacts breakage rate but reduces overall system specific energy.

Conclusions:

• The CFD-DEM model offers reliable predictions for particle collision dynamics in VSI crushers.
• Optimizing rotational speed is effective for enhancing breakage efficiency and energy management.
• Findings support the development of more efficient and energy-saving crusher designs.