Narrow-particle-size calcium carbonate powder grading device for secondary separation of vertical mill

The invention relates to the technical field of calcium carbonate powder grading devices, and discloses a narrow-particle-size calcium carbonate powder grading device for secondary separation of a vertical mill, which comprises a base, the top of the base is fixedly provided with a loading frame, and one side of the loading frame is rotatably provided with a separation cylinder; the top of a supporting frame is coaxially and rotationally installed in the center of the end, away from the loading frame, of the separation barrel in a penetrating mode, and the bottom of the supporting frame is fixedly connected to the upper surface of the base. A motor of the driving assembly is fixedly mounted at the top of the loading frame. According to the narrow-particle-size calcium carbonate powder grading device for secondary separation of the vertical mill, multiple separation structures are arranged, powder can be finely separated in a higher-precision range, meanwhile, the primary separation structure of the device can