材料期刊网

羟肟酸是一种高效的螯合捕收剂,易与Fe形成络合物,可有效地分离赤铁矿和假象赤铁与石英等脉石矿物.当处理原矿磁选的粗精矿时,C_(7-9)羟肟酸(AHA)和柴油各71 g/t的正浮选与醚胺106g/t(硫酸95g/t)的反浮选指标相近,在弱碱性介质中,C_(7-9)羟肟酸粗选泡沫经重选分离,精矿品位65.71%Fe,回收率近82%.采用305g/t塔尔羟肟酸(THA)浮选.品位由27—29%(提高到62—64%Fe,回收率88—90%.比较氧化石腊皂(1200g/t)浮选,铁精矿的回收率高8%,而不增加药剂费用,经济效益显著.

The hematite and pseudo-hematite can be separated effectively from the gan-gue minerals like quartz by using hydroxamic acid as collector.In the treatmentof the rough concentrate from the magnetic separation for iron ore,the resultsfrom direct flotation using AHA and diesel oil,each 71 g/t,are similar to thatfrom reverse flotation using etheramine 106 g/t and H_2SO_4 95 g/t.In weaklybasic pulp,the rough flotation froth collected by AHA and diesel oil was subjec-ted to gravity separation,the total concentrate grade may be up to 65.7% Fe ata recovery about 82%.By floating the lean iron ore with 305 g/t THA,theiron grade may be raised from 27—29 % to 62—64 % Fe for recovery of 88—90%.This means that an increment of 8 % recovery may be gained with no morereagent cost and with better economic benefit in comparison with flotation byusing 1200 g/t oxidized paraffin soap.