Crushing and purifying equipment and purifying method for quartz sand before calcination

The invention discloses crushing and purifying equipment and a purifying method for quartz sand before calcination, and belongs to the technical field of crushing and purifying, the crushing and purifying equipment comprises a crushing box, the bottom side of the crushing box is connected with a bottom shell, one side of the bottom shell is provided with a filter screen, an inner cavity of the crushing box is rotatably connected with a rotor, and one end of a rotor shaft body extends out of the crushing box and is connected with a flywheel. According to the invention, the view of an opening in one side of the crushing box is fully exposed through the angle control mechanism, triangular plates on two sides move away from each other to drive a coupling plate to be separated from a wedge block on the rear side of an impact plate, at the moment, the impact plate can be pulled out from one side of an impact frame through the wedge block from the opening in the top of the crushing box, and the damaged impact block