Experimental Study on Spodumene Particle Fluidization Characteristics and Effect of Operating Conditions

ABSTRACT Spodumene, a critical lithium‐bearing mineral, necessitates high‐temperature phase transformation roasting during processing. Transitioning from conventional rotary kilns to fluidized bed reactors offers significant potential to enhance product uniformity and energy efficiency. Gas–solid flow of spodumene particles in a fluidized bed experimental system was studied, with emphasis on minimum fluidization velocity, pressure drop characteristics, and pressure fluctuations. Pressure signal processing methods—including standard deviation and power spectral density analyses—were employed to quantify the influence of key operational parameters: initial bed material height‐to‐diameter ratio ( H / D ) (1.0–3.0) and gas velocity ( u g ) (0–15.69 cm/s). These findings provide critical insights for scaling spodumene phase transformation processes in industrial fluidized bed systems.