Mixing device in potassium chloride purification process and use method thereof

The invention discloses a mixing device in a potassium chloride purification process and a use method of the mixing device. The mixing device comprises a bin body, and a fixed block is fixedly connected to the bin body; the rotating rod is located in the middle of the bin body, the rotating plates are of an arc-shaped structure, and a control rod is arranged on the fixed block; the conversion assembly is used for enabling the plurality of rotating plates to rotate and switch angles to increase the stirring area, and the rotating plates are matched with one another; the matching assembly enables the multiple rotating plates which are matched with one another to shake; by rotating the control rod, the embedded plate is separated from the sliding groove, so that the movable sleeve moves downwards, the rotating plate and the rotating plates are rotated in cooperation with the hinge rod, position rotation of the three rotating plates is completed, namely, the stirring effect is converted from a stirring rod to a s