The VP-TA2 rotary plasma low-temperature ashing instrument has four characteristics: 1. The ashing process has a low temperature and does not damage the integrity of the mineral composition and structure of the coal ash;2. The rotating chamber rotates in a vacuum environment, driving the coal powder to roll and achieve uniform and sufficient ashing of the coal powder; 3. High degree of automation, able to operate continuously for more than 8 hours without manual intervention; 4. It can be loaded with coal powder using a rotary bottle or a traditional quartz boat for ashing, with a dual function and high cost-effectiveness.