Meaning
Thermal processing equipment consisting of a rotating annular hearth that moves material through different temperature zones, used for continuous calcination and heat treatment of battery active materials. Utilizing a rotary hearth kiln ensures uniform heating and consistent product quality for anode and cathode precursors. This equipment allows high volume throughput while maintaining precise control over the heat cycle, which is a major requirement for meeting the high volume demands of gigafactories.
Continuous Operation
Raw materials are continuous fed onto the rotating hearth and discharged after completing a full revolution. The continuous operation of the kiln allows for high productivity and reduces energy consumption compared to batch processes. This configuration is ideal for large scale battery material production.
Temperature Uniformity
Heating elements are arranged in zones to create a precise thermal profile along the rotational path of the hearth. The temperature uniformity of the material is achieved by controlling the rotational speed and the heating intensity of each zone. Accurate heating prevents under reacted or over sintered material batches.
Process Advantage
Mechanical agitation is minimized on the stationary rotating hearth, which reduces dust generation and material degradation. The process advantage of the kiln makes it suitable for processing delicate or highly uniform precursor particles. This equipment design protects the physical structure of the battery materials.
