Strategic metal element enrichment method based on mineral X-ray response characteristics

The invention discloses a strategic metal element enrichment method based on mineral X-ray response characteristics, and belongs to the technical field of coal series strategic metal separation and pre-enrichment. The problems that an existing strategic metal occurrence phase enrichment method is poor in sorting effect and low in precision are solved. The strategic metal element enrichment method comprises the steps that 1, a research area is determined according to a target mining area, and strategic metal mineral substance composition and physicochemical properties are clarified; 2, preparing a test sample which is regular and controllable in thickness; step 3, establishing an occurrence phase/non-occurrence phase single mineral thickness-gray feature recognition library; step 4, establishing an occurrence phase/non-occurrence phase mixed mineral thickness-gray feature recognition library; 5, calculating a sorting threshold value of the intelligent gangue sorting machine, and completing establishment of a g