Iso-floatable separation process of siliceous-calcareous collophanite

The invention relates to an iso-floatable separation process of siliceous-calcareous collophanite, comprising the following steps of: crushing and grinding siliceous-calcareous-based collophanite ores, adding water, mixing size, and then entering iso-floatable operation for the iso-floatable flotation of the siliceous-calcareous-based collophanite ores; enabling flotation froths to flow into a reverse flotation agitating tank, mixing the size, and then entering a reverse flotation system for the reverse flotation of carbonate gangue minerals, wherein products inside a reverse flotation tank are reverse flotation phosphate concentrates; and enabling the products inside an iso-floatable flotation tank to enter a direct flotation agitating tank and materials obtained after size mixing to enter a direct flotation system for direct flotation, wherein direct flotation froth products are direct flotation phosphate concentrates. The iso-floatable separation process sufficiently utilizes the difference of natural floa