This invention relates to the field of
lepidolite calcination technology, and particularly to a high-temperature
calcination process and apparatus for
lepidolite based on
tail gas purification. The apparatus includes a
calcination kiln body, and a feed hopper and a
discharge cylinder rotatably connected to both ends of the
kiln body. The
kiln body is equipped with a conveying and screening mechanism for graded calcination of
lepidolite, and a
recovery and purification mechanism for multi-stage treatment of calcination
tail gas is located on one side of the kiln body. This invention achieves graded conveying and
processing of lepidolite through the counter-rotation of the kiln body and the rotating cylinder, controlling the
transit time of lepidolite within the kiln body. This avoids the phenomenon of some lepidolite being discharged
too slowly or too quickly, leading to local over-calcination or incomplete calcination. The graded screening calcination process for lepidolite allows small lepidolite particles to be retained by the screening mesh, delaying
discharge and extending the calcination interval, creating a difference in calcination time between small and large lepidolite particles. This effectively avoids the problems of over-calcination of
small particles and incomplete calcination of large particles.