Process for discarding tailings in mechanical beneficiation of absorption-state vanadium ores

The invention provides a process for discarding tailings in the mechanical beneficiation of absorption-state vanadium ores. The process comprises the following steps: crushing and grinding the absorption-state vanadium ores to negative 200 meshes; beneficiating on a spiral concentrator or a spiral chute; collecting fine-fraction minerals and light minerals as spiral concentrate; and carrying out floatation operation on heavy minerals and coarse-fraction minerals by using H2SO4 as the pH regulator to regulate the pH value to 4 to 6, using dodecyl amine-hydrochloride as the collector with the amount of 100 to 500g/t, and using isooctanol as the frother with the amount of 5 to 50g/t to carry out the flotation from section one to section ten, wherein, the floating foam part and the spiral concentrate are merged to constitute the main concentrate; and the part in the chute constitutes the main tailings to be discarded. The invention has the advantages that the process is direct and efficient, and the cost is low,