关键词: 赤铁矿, 洗矿溢流, 细筛, 螺旋溜槽, 强磁选, 反浮选

Abstract: In order to provide the basis for making use of  ore-washing overflow of India hematite with Fe grade of 50%, the beneficiation experiments on ore-washing overflow were carried out by the process of fine screening-high intensity magnetic separation-anionic reverse flotation and the process of fine screening -spiral chute -high intensity magnetic separation-anionic reverse flotation.The tests results showed that under grinding fineness of -0.076 mm 75%, the concentrate with Fe grade of 67.01% and 67.12%, and Fe recovery of 87.77% and 89.71% were obtained respectively by the two processes.Since the latter decreased the flotation process by about 1/3 comparing with the former, the latter process is recommended.

Key words: Hematite, ore-washing overflow, Sieve, Spiral chute, High intensity magnetic separation, Reverse flotation