Spiral chute for mineral processing

A spiral chute for mineral separation, comprising:

• a spiral chute body which is supported to be upright,
• wherein:
• a radial cross section curve of the spiral chute body gradually raises from an inside to an outside of the spiral chute body;
• the radial cross section curve of the spiral chute body is a complex curve;
• the complex curve comprises a first curve segment and a second curve segment which are sequentially arranged from the inside to the outside of the spiral chute body;
• and
• a tail end of the first curve segment and a head end of the second curve segment are connected at a first connection point, and an included angle between a curve tangent of the head end of the second curve segment and a horizontal plane is smaller than an included angle between a curve tangent of the tail end of the first curve segment and the horizontal plane, and
• wherein:
• the first curve segment comprises a first curve segment starting segment and a first curve segment tail segment which are sequentially arranged from the inside to the outside of the spiral chute body;
• and
• a tail end of the first curve segment starting segment and a head end of the first curve segment tail segment are connected at a second connection point, the tail end of the first curve segment tail segment and the head end of the second curve segment are connected at the first connection point, and an included angle between a curve tangent of the tail end of the first curve segment starting segment and the horizontal plane is smaller than an included angle between a curve tangent of the head end of the first curve segment tail segment and the horizontal plane.