Abstract: The particle size of minerals is one of the key factors affecting mineral flotation. Coarse particle flotation is not only of great significance to alleviate grinding pressure and save energy and reduce consumption, but also conducive to the resource utilization of tailings, providing a new solution for tailless or less tailed mines. Therefore, coarse particle flotation is of great significance for the construction of green mines. In this paper, the research progress of coarse particle flotation technology and equipment at home and abroad is reviewed from the perspective of particle surface characteristics and foam characteristics genes, combined with the idea of gene mineral processing engineering. The principles, advantages and disadvantages of mechanical stirring coarse particle flotation, coarse particle fluidized bed flotation and foam separation (SIF) flotation technology are summarized respectively. This paper mainly discusses the factors that affect the flotation process of coarse particles, and defines the key factors that affect the flotation of coarse particles. Conventional flotation technology is difficult to fundamentally improve the upper limit of ore separation. The combination of composite force field and flotation provides the possibility for the flotation of coarse particles and even super coarse particles, which will further promote the comprehensive recovery of minerals and the high consumption and comprehensive utilization of tailings resources.

Key words: Coarse flotation, Genetic mineral processing engineering, Surface characteristic gene, Mechanical stirring flotation, Ultra coarse flotation, Fluidized bed flotation, Influencing factors, SIF method