Abstract: In order to provide a basis for development and utilization of a poor Anshan-type hematite ore, the optimization of the steel ball system of grinding and the concentration tests were carried out. The results showed that with the ball mill of φ160 mm×180 mm, the products with slight sliming in grinding process was supplied for the latter beneficiation when the ball diameters were 15, 20 and 25 mm (its mass ratio are 24%, 36%, 40% respectively). When the ore was ground to the size of 75% -0.071 mm under the steel ball system of grinding, a combined concentrate with iron grade and recovery of 66.69% and 76.22% separately was obtained through the beneficiation flow-sheet of classification-gravity concentration-magnetic separation-reverse flotation.

Key words: Anshan-type low-grade hematite ore, Classification, Gravity concentration, Magnetic separation, Reverse flotation, Steel ball system of grinding