Abstract:In recent years, in order to respond to the national policy of energy conservation and emission reduction, construction of green mines, and solve the problem that the demand for mineral raw materials is greater than the supply, on the one hand, various election plants at home and abroad have gradually begun to renovate the existing equipment, on the other hand, they are also gradually replacing other methods of selection with re-selection.As an ancient mineral processing method, re-selection has once again shown its vitality in today"s society due to its green and low cost.As a kind of heavy separation equipment, spiral chute is widely used in concentrators at home and abroad due to its wide selection size range, large unit area handling capacity, simple structure, no moving parts, easy maintenance, unique structure and excellent sorting performance.At present, the research on spiral chute at home and abroad focuses on the optimization of theoretical formula and model, but the research on secondary circulation is less.In this paper, the research status of secondary circulation in spiral chute is summarized.The influence of operating parameters of spiral chute on water flow characteristics and separation is further summarized, and the research direction of secondary circulation is analyzed.