关键词: 黄药, 磁铁矿, 磁选, 浮选

Abstract: In order to develop and utilize an iron ore in Anhui Province，the ore property analysis and beneficiation test are carried out on the samples obtained from the exploration.The test results show that un‐ der the conditions of the first grinding fineness of -0.076 mm55%，the amount of xanthate 150 g/t and the amount of 2# oil 36.8 g/t，the iron ore is recovered by the combined process of flotation and magnetic separa‐ tion. The sulfur concentrate with sulfur grade of 37.44% and sulfur recovery of 73.93% is obtained by closed-circuit test of one roughing，two cleaning and one scavenging flotation.Subsequently，the magnetic separation pre-concentration test is carried out on the flotation tailings，and the magnetic field strength is 143.24 kA/m. The next grinding and magnetic separation tests are carried out on the obtained magnetic pre�concentration concentrate. The second-stage grinding fineness is determined to be -0.045 mm88%. The mag‐ netic field strength of one roughing and one cleaning in the second-stage magnetic separation is 143.24 kA/m and 111.41 kA/m，respectively. Finally，an iron concentrate with TFe grade of 64.59% is obtained.The grav‐ ity separation test of high intensity magnetic-spiral chute 1 roughing 1 cleaning is carried out on the low in‐ tensity magnetic comprehensive tailings. The high intensity magnetic field strength is 159.15 kA/m，and the iron concentrate with iron grade of 51.30% is finally obtained. It is combined with the low intensity magnetic concentrate to form a total concentrate. The total iron grade of the total concentrate is 64.06%，the iron re‐ covery rate is 60.64%，and the sulfur grade is 0.031%.

Key words: xanthate, magnetite, magnetic separation, flotation