Limestone conveying and impurity removing device

The utility model relates to the technical field of limestone production, in particular to a limestone conveying and impurity removing device which comprises a material filtering box, the bottom of the material filtering box is designed to be in a funnel shape, a cover plate is installed on the top of the material filtering box, a material returning box is installed on the upper end face of the cover plate, and a motor is vertically connected to the top of the material returning box. The lower surface of the cover plate is vertically connected with a fixed cylinder and a return box through bolts, a spiral stirring shaft is vertically arranged in the fixed cylinder, the top end of the spiral stirring shaft is connected with the output end of the motor, the bottom of the fixed cylinder is connected with a filter cylinder, the bottommost end of the filter box is connected with a discharging pipe, one side of the discharging pipe is connected with a return pipe, and the other side of the return pipe is connected