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峨口铁矿选矿厂采用阶段磨矿-弱磁选-细筛分级-淘洗磁选工艺流程,生产的铁精矿铁品位可达66%以上,但SiO2含量较高,在7%左右。为了使峨口铁矿选矿厂最终铁精矿的SiO2含量降到5%以下,以该厂淘洗磁选机的给矿为对象进行了提铁降硅选矿试验。试验结果表明:先采用氢氧化钠、玉米淀粉、石灰和中钢集团马鞍山矿山研究院有限公司研制的捕收剂MD对试样进行1粗1精3扫反浮选,再将反浮选尾矿再磨至-0.038 5 mm占82.60%后进行1粗1精弱磁选,最终可以获得铁品位为69.58%、铁回收率为97.05%、SiO2含量为4.23%的综合铁精矿,铁精矿SiO2含量达到预期目标。 相似文献
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根据某铁矿山老尾矿库尾矿的性质特点,进行了尾矿铁资源回收工艺试验,试验采用原矿阶段磨矿—弱磁+细筛—强磁—重选流程,最终获得了产率为22.12%,铁品位为58.90%,铁回收率为64.31%的符合冶炼要求的铁精矿,并为此类尾矿资源地开发利用提供了技术依据. 相似文献
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The article demonstrates feasibility of additional iron recovery from the secondary kind of mineral raw materials—dry magnetic separation tailings obtained at crushing and processing factories of Abaza and Irba and wet magnetic separation tailing produced at Abagur processing plant of Evrazruda. Dry centrifugal separation treatment of Abaza tailings–3 mm in size allowed 6.3% of middlings with Fetotal and Femag contents of 40.4 and 32%, respectively; the result of dry magnetic separation of Irba tailings -5 mm in size is 7.7% middlings with the content of Fetotal and Femag 39.9 and 30.8%. Wet magnetic separation of Abagur tailings -0.007 mm in size allowed recovery of 0.6 to 1.45% of magnetic fraction with Fetotal content of 53.3 and 51.6%, respectively, and Femag content of 49.8 and 48.5%. Fitting of modern separators with the magnetic systems based on neodymium–ferrum–boron considerably improves output of the machines (in dry centrifugal separation circuit) and enhances the yield of magnetic product in wet separation of tailings. 相似文献
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对铁品位34%左右的某铜铁矿山选铜尾矿进行了单一强磁选、强磁选-重选、强磁选-磨矿-反浮选、强磁选-磨矿-强磁选-反浮选、磨矿-强磁选-反浮选的多方案试验研究, 经对比分析, 最终确定采用磨矿-强磁选-反浮选工艺, 可获得精矿铁品位63.17%、回收率70.30%的良好指标。 相似文献
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用一种新工艺对铁矿矿石进行了可选性研究,获得了铁品位为71.84%、二氧化硅含量为0.13%的超级铁精矿. 相似文献
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