Beneficiation method for recycling middle-low-grade chromite

The invention provides a beneficiation method for recycling medium-low-grade chromite. The method comprises the following steps: S1, carrying out ore grinding treatment on raw ore to obtain raw ore powder; s2, the raw ore powder is introduced into first magnetic separation equipment to be subjected to strong magnetic roughing, and first concentrate and first tailings are obtained; s3, the first tailings are introduced into second magnetic separation equipment to be subjected to strong magnetic scavenging, and second concentrate and second tailings are obtained; and S4, the mixed first concentrate and second concentrate are subjected to chute separation twice, and final concentrate is obtained. By means of the beneficiation process, the chromium concentrate with Cr2O3 larger than or equal to 40% can be finally obtained, and the quality requirement of third-level products for ferrochrome smelting is met. According to the process, strong magnetic tailing discarding and spiral chute refining are adopted, the prin