捕收剂对铁精矿浮选脱硫的影响
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摘要
本文以高硫蒙古铁精矿(硫含量2.56%)为研究对象,分别选用四种不同的捕收剂(丁基黄药,己基黄药,异戊基黄药,丁基铵黑药)和TS复合活化剂,进行反浮选脱硫,探究捕收剂对高硫铁精矿浮选脱硫效果的影响规律。确定最佳的捕收剂后进行浮选脱硫的开路和闭路试验。试验结果表明:选用丁基铵黑药作捕收剂与TS活化剂配合,脱硫效果最佳。粗选时,在丁基铵黑药用量为0.4 kg/t、TS活化剂用量为0.7 kg/t的条件下,铁精矿中硫降到了1.18%,铁品位67.98%、铁回收率99.02%;通过一粗一扫开路试验,获得了含硫0.62%、铁品位68.25%、铁回收率89.27%的铁精矿;最终采用一粗一扫一精闭路浮选流程,获得了含硫0.71%、铁品位68.40%和铁回收率92.70%的铁精矿。对比浮选前后的矿物,铁精矿较原矿硫含量大幅度降低,且大部分含硫矿物都进入到浮选尾矿中。本工艺为铁精矿浮选脱硫提供有效的解决办法。
In this paper, the desulfurization technology by reverse flotation was separately applied for weak magnetite iron concentrate of Mongolia(the sulfur content 2.56%). The collector contains four different types of reagent, such as sodium butyl xanthate, sodium hexyl xanthate, sodium isoamyl xanthate and ammonium-butyl aerofloat), and the activator was TS complex reagent. The influences of reagent syetem on the effect of desulfurization of high desulfurization iron concentrate by flotation were researched, the best collector was determined, and the open circuit and closed circuit experiment of flotation desulfurization were finished. The results showed that the desulfurization effect was best, with TS as activator and ammoniumbutyl aerofloat as collector, the sulfur content in iron concentrate decreased to 1.18% by one roughing, under the ammonium din-butyl dithiophosophate dosage of 0.4 kg/t and TS activator of 0.7 kg/t, the grade was67.98%% and the recovery was 99.02%. The iron concentrate with sulfur content of 0.62% was obtained by the "one roughing-one scavenging" open circuit test, the grade was 68.25%% and the recovery was 89.27%.The iron concentrate with sulfur content of 0.71%, grade of 68.25%% and recovery of 89.27% was finally obtained by the closed circuit flotation process of "one roughing-one scavenging-one cleaning", the grade was 68.25% and the recovery was 89.27%. Compared with the mineral before and after flotation, the sulfur content of iron concentrate is greatly reduced, and most of the magnetite was entered into the flotation tailings. This provided an effective method for the desulphurization of iron concentrate.
In this paper, the desulfurization technology by reverse flotation was separately applied for weak magnetite iron concentrate of Mongolia(the sulfur content 2.56%). The collector contains four different types of reagent, such as sodium butyl xanthate, sodium hexyl xanthate, sodium isoamyl xanthate and ammonium-butyl aerofloat), and the activator was TS complex reagent. The influences of reagent syetem on the effect of desulfurization of high desulfurization iron concentrate by flotation were researched, the best collector was determined, and the open circuit and closed circuit experiment of flotation desulfurization were finished. The results showed that the desulfurization effect was best, with TS as activator and ammoniumbutyl aerofloat as collector, the sulfur content in iron concentrate decreased to 1.18% by one roughing, under the ammonium din-butyl dithiophosophate dosage of 0.4 kg/t and TS activator of 0.7 kg/t, the grade was67.98%% and the recovery was 99.02%. The iron concentrate with sulfur content of 0.62% was obtained by the "one roughing-one scavenging" open circuit test, the grade was 68.25%% and the recovery was 89.27%.The iron concentrate with sulfur content of 0.71%, grade of 68.25%% and recovery of 89.27% was finally obtained by the closed circuit flotation process of "one roughing-one scavenging-one cleaning", the grade was 68.25% and the recovery was 89.27%. Compared with the mineral before and after flotation, the sulfur content of iron concentrate is greatly reduced, and most of the magnetite was entered into the flotation tailings. This provided an effective method for the desulphurization of iron concentrate.
引文
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[10]苏建芳,王中明,刘书杰,等.加拿大某磁铁矿脱除磁黄铁矿浮选试验研究[J].矿产综合利用,2017(4):43-45.
[2]周瑜林,李文风,王祥,等.新药剂在富含磁黄铁矿的磁铁矿浮选脱硫中的应用研究[J].矿冶工程,2016, 36(8):39-42.
[3]赵志强,戴惠新.云南某高硫铁矿石深度降硫试验研究[J].金属矿山, 2007, 5(8):31-33.
[4]H.Moslemi,P.Shamsi,F.Habashi.Pyriteandpyrrhotite open circuit potentials study:Effects on flotation[J].Minerals Engineering,2011,24(10):1038-1045.
[5]GoncalvesK.L.C, Andrade V.I.L,Peres A.E.C. Theeffect of griding conditions on the flotation of sulphide copper ore[J].Minerals Engineering,2013, 16(12):1213-1216.
[6]计少石,麦笑宇,余永富.磁黄铁矿与磁铁矿分离研究[J].矿冶工程, 2011, 31(6):43-46, 50.
[7]孟宪瑜.磁铁矿与磁黄铁矿的浮选分离的试验研究[J].有色金属, 2011, 27(5):16-17, 40.
[8]李慧,谢建宏,张崇辉.陕西某磁铁矿选铁脱硫试验研究[J].中国矿业, 2011, 20(8):103-105.
[9]于慧梅,王化军.包钢选厂高硫磁选铁精矿反浮选脱硫试验研究[J].金属矿山, 2012, 427(1):63-66.
[10]苏建芳,王中明,刘书杰,等.加拿大某磁铁矿脱除磁黄铁矿浮选试验研究[J].矿产综合利用,2017(4):43-45.