Sand blasting abrasive impurity separation system and method

The invention discloses a sand blasting abrasive material impurity separation system and method.The sand blasting abrasive material impurity separation system comprises an elevator, a screening device and a sand guide hose, the elevator is used for lifting waste abrasive materials from a pit to the top of the elevator, and a branch pipe is arranged at the top of the elevator; the screening device is used for separating impurities and iron powder from waste abrasives and comprises a screening device body and movable supporting legs. By improving the structure of the elevator, waste abrasives are brought to the top of the elevator from a pit, guided out of a branch pipe and flow to an abrasive screening device through a hose, impurity separation is completed, relatively complete abrasive recycling is achieved, and the system has the advantages of being easy to use and convenient to install; and when the screening operation is not carried out, the screening device and the sand guide hose can be detached, so that