| 摘要 |
<p>A high-yield spiral chute for gravity concentration comprises a central column (1) and a spiral chute body (2) surrounding the central column (1). The chute face of the spiral chute body (2) is inclined inward and provided with a plurality of steps (3) extending along the chute face spirally, and upper surfaces (31) of the steps (3) form negative angles with the horizontal plane. During use of the chute, heavy ore particles can move to the inside of the chute from the outside under low resistance due to the fact that the upper surfaces of the steps are inclined inward, lateral vertical surfaces of the steps can stop and prevent the heavy ore particles from being thrown to the outside of the chute from the inside under the effect of the centrifugal force, lighter particles can cross the lateral vertical surfaces of the steps easily to be thrown to the outside of the chute from the inside, and accordingly the yield of the heavy ore particles is high. In addition, the chute has a simple structure.</p> |
