从白云鄂博尾矿中回收铁的选矿试验

发布时间：2018-07-14 12:54

【摘要】：白云鄂博尾矿铁品位为25.71%,铁主要以磁铁矿、赤铁矿和硅酸盐形式存在。试样粒度较细,-0.023 mm粒级产率为56.03%、铁品位达到34.11%、铁分布率高达70.26%,而+0.025 mm粒级铁品位低于16%、铁分布率不足15%。为给该尾矿中铁的回收提供技术依据,进行了选矿试验。结果表明:试样经1粗1精弱磁选,获得了铁品位为64.10%、回收率为16.48%的弱磁选精矿;弱磁选尾矿经1粗1精高梯度强磁选,获得了铁品位为47.04%的强磁选精矿;强磁选精矿磨细至-0.023 mm占90%,以硫酸为调整剂、乳酸为抑制剂、W201为捕收剂经1粗2精1扫正浮选,正浮选精矿与弱磁精矿合并后为最终精矿,其铁品位为64.45%、回收率为58.47%。试验取得了较好的分选指标,可以为白云鄂博尾矿中铁资源的综合回收提供技术参考。
[Abstract]:The iron grade of Bayan Obo tailings is 25.71%, and iron mainly exists in the form of magnetite, hematite and silicate. The grain size of the sample was 56.03mm, the iron grade was 34.11%, the iron distribution rate was 70.26, while the grade of 0.025 mm grain iron was less than 16%, and the iron distribution rate was less than 15%. In order to provide technical basis for the recovery of iron from the tailings, the ore dressing test was carried out. The results show that the iron grade of the sample is 64.10% and the recovery is 16.48%, and the strong magnetic separation concentrate with iron grade of 47.04% is obtained by the high gradient magnetic separation of the tailings of the weak magnetic separation after 1 coarse 1 fine high gradient magnetic separation, and the iron grade is 64.10%, the recovery rate is 16.48%, and the iron grade is 47.04%. The concentrate of strong magnetic separation is grinding to -0.023 mm and 90 mm. With sulfuric acid as the adjuster, lactic acid as the collector and W201 as the collector, the concentrate is combined with the weak magnetic concentrate and the positive flotation is the final concentrate. The iron grade of the concentrate is 64.45 and the recovery is 58.47. The experimental results obtained a better separation index, which can provide a technical reference for the comprehensive recovery of iron resources in Bayan Obo tailings.
【作者单位】：内蒙古科技大学矿业研究院;内蒙古科技大学材料与冶金学院;北京化工大学材料科学与工程学院;
【分类号】：TD926.4;TD951

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