Ore sand is fed into the feeding port located at the top of the spiral chute, where supplementary water is added to adjust the slurry concentration. The slurry naturally spirals down the chute, and as it rotates along the inclined surface, an inertial centrifugal force is generated. Due to differences in the ore's specific gravity, particle size, and shape, the centrifugal and gravitational forces cause the separation of minerals from the sand. The minerals are discharged at different points along the chute, producing streams of concentrate, middling, and tailings. The spiral chute is suitable for sorting fine materials with a particle size of 0.3-0.02 mm, including iron ore, ilmenite, chromite, pyrite, zircon, rutile, monazite, phosphorite, tungsten, tin, tantalum, niobium, and other non-ferrous, rare, and non-metallic minerals with a significant difference in specific gravity.