Abstract: A simple direct reverse flotation technology of magnetic separation concentrate for a refractory iron ore was introduced. The morphology and mineral composition of raw ore, concentrate and tailings were discussed by means of XRD, SEM and EDS, and the dispersion character of minerals was mainly analyzed, which provided theory foundation for direct reverse flotation technology of magnetic separation concentrate for carbonate-containing refractory iron ore. The results showed that the qualified iron concentrate can be obtained by adding dispersant; lots of fine useful iron minerals and gangue particles are easy to cover non-selectively on the surface of coarse iron minerals and gangue particles, which is the main reason of the refractory iron ore difficult to be separated. It has been comprehensively demonstrated that dispersant plays an important role in dispersing the particles, and hence, the selective separation of useful iron minerals from gangues occurs.