Beneficiation process for efficiently recovering iron and rare earth from bayan obo medium-lean oxidized heaped ore

The invention discloses a mineral processing technology for efficiently recovering iron and rare earth from bayan obo medium-lean oxidation stacking ore. The mineral processing technology comprises the following steps that S1, raw ore is directly subjected to dry separation after being crushed; s2, the dry separation concentrate is subjected to coarse grinding through a ball mill; coarse grinding products are subjected to weak magnetic separation; weak magnetic tailings are subjected to strong magnetic separation; weak magnetic concentrate and strong magnetic concentrate are mixed and then are subjected to fine grinding through an Ai sand mill, fine grinding products are subjected to weak magnetic separation, weak magnetic tailings are subjected to strong magnetic separation, and the strong magnetic concentrate is subjected to reverse flotation iron separation to obtain iron concentrate. And the first-section strong magnetic tailings and the second-section strong magnetic tailings are subjected to one-roughin