Production device for producing iron ore concentrate through multi-stage dry grinding and dry separation of iron ore

The utility model discloses a production device for producing iron ore concentrate through multi-stage dry grinding and dry separation of iron ore. The production device comprises a first material lifting system, a dry rough grinding machine, a dry preselector, a first tailing bag collector, a second material lifting system, a dry fine grinding machine, a dry classificator, a second tailing bag collector and a concentrate bin which are connected in sequence. The first material lifting system is used for conveying iron ore raw materials into the dry type rough grinding machine; the dry type rough grinding machine is used for roughly grinding iron ore; a dry type preselection area is formed on the dry type preselection machine and is used for roughing gas-solid two-phase flow materials coarsely ground by the dry type coarse grinding machine; the second material lifting system is used for conveying roughing materials discharged by the dry type preselector into the dry type fine grinding machine; the dry type fin