关键词: 　窄粒级选矿, 　钛铁矿　, ＴｉＯ２回收率, 　分级　, 悬振锥面选矿机

Abstract: The recovery of titanium from the iron tailings of vanadium titanium magnetite in the Midi titanium dressing plant in Panzhihua is carried out.The particle size distribution of titanium raw material is wide,whose TiO2 grade is 954%,and titanium mainly exists in the form of ilmenite.Aiming at the problem of bad benefication index of coarse and fine particle fractionstwo stage high intensity magnetic separationflotation principle flowsheet,narrow size experiment on separating titanium from the titanium raw material was conducted.Results show that the raw material was classified into coarse fraction (+01 mm),fine fraction（0038~01 mm）and ultrafine fraction（-0038 mm）after 1 mm slag screening.Coarse titanium concentrate with yield of 505%,TiO2 grade of 4732%,recovery of 2505% and fine titanium concentrate with yield of 641%,TiO2 grade of 4729%,recovery of 3176% were obtained after coarse fraction and fine fraction raw material were separated by the principle flowsheet of magnetic separationflotation.Ultrafine titanium concentrate with yield of 053%,TiO2 grade of 4713%,recovery of 260% was obtained after beneficiating ultrafine fraction raw material by the open circuit test of suspension vibrationtwo roughing flotation of sulfurone roughing and three cleaning flotation of titanium.Each fraction titanium concentrate could be combined into qualified synthetic titanium concentrate with TiO2 grade of 4730%,recovery of 5941%.Compared to the original process flowsheet,concentrate TiO2 〖CM42-110〗 recovery rate is increased by about 24 percentage points.It shows that the recovery of titanium concentrate 〖HJ〗〖LM〗and ilmenite can be obviously increased and enhanced by narrow size beneficiation titanium,highly efficient recovery and utilization of titanium from the iron tailings is realized.

Key words: Narrow size beneficiation, Ilmenite,Recovery of TiO2, Classification, Suspension vibrating cone concentrator