Method and system for determining cyclic load of photoelectric preselection equipment

The invention relates to a method and a system for determining the cyclic load of photoelectric preselection equipment, and belongs to the technical field of photoelectric beneficiation of beneficiation processes in industrial production. The method comprises the steps that crushed materials obtained by screening and sorting materials are mixed with new materials again, then screening and sorting are carried out again, crushed materials are obtained again, the crushed materials are mixed with the new materials, screening and sorting are carried out, the steps are cyclically repeated till closed-circuit balance of a photoelectric sorting system is achieved, circulation is stopped, and the photoelectric sorting system is obtained. And the circulation load is determined according to the weight ratio of the last-time lower-layer oversize material to the zero-time lower-layer oversize material in the circulation. The determination method and system are suitable for the closed-circuit sorting processes of two-secti