钛磁铁矿对钛铁矿浮选的影响

钛磁铁矿对钛铁矿的浮选会产生非常不利的影响。单矿物研究结果表明:钛磁铁矿具有比钛铁矿更好的可浮性,浮选中会优先进入精矿,影响精矿品位,并增加药剂消耗;钛磁铁矿易产生磁团聚现象,造成机械夹带,包裹脉石的钛磁铁矿磁团聚体进入浮选精矿中会降低精矿品位和回收率。钒钛磁铁矿选铁尾矿实际矿样的试验结果表明:不除铁直接浮选钛时,精矿TiO2品位为44.02%,回收率为44.38%;而先经弱磁选除去钛磁铁矿后,采用相同的浮选流程和药剂制度,浮选精矿的TiO2品位提高到47.40%,回收率提高到52.64%。

Effect of Titano-magnetite on Ilmenite Floatation

Titano-magnetite has considerable bad effect on ilmenite floatation.The tests results of mono-mineral floatation show that titano-magnetite presents better floatability than ilmenite.Some gangues wrapped by titano-magnetite will go into the floatation concentrate, which decrease the TiO₂ grade and consume more reagents in flotation.And the magnetic aggregation easily occurs in the titano-magnetite ore, resulting in the mechanical entrapment.That the titano-magnetite entraining with gauges comes into the flotation concentration can decrease the concentrate grade and recovery.The comparison floatation tests with magnetic tailings of vanadium titano-magnetite showed that the floatation concentrate grading at 44.02% of TiO2 with recovery of 44.38% were obtained by the direct flotation without Fe removal.If Fe in titano-magnetite was removed by low intensity magnetic separation before floatation, TiO₂ grade of final floatation concentrate increased to 47.40% and the recovery increased to 52.64% through the same flotation flow-sheet and reagents.