| 峨口铁精矿提铁降硅选矿试验 |
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| 引用本文： | 虞力,胡义明,刘军,张永,皇甫明柱. 峨口铁精矿提铁降硅选矿试验[J]. 金属矿山, 2014, 43(4): 78-81 |
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| 作者姓名： | 虞力 胡义明 刘军 张永 皇甫明柱 |
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| 作者单位： | 1.中钢集团马鞍山矿山研究院有限公司，安徽 马鞍山 243000；2.东北大学资源与土木工程学院，辽宁 沈阳 110819 |
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| 基金项目： | * “十二五”国家科技支撑计划项目（编号：2012BAB14B00）。 |
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| 摘 要： | 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。
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| 关 键 词： | 铁精矿 提铁降硅 反浮选 再磨 弱磁选 |
Beneficiation Tests of Iron Increase and Silicon Reduction for Iron Concentrate from Ekou Iron Mine |
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| Yu Li,Hu Yiming,Liu Jun,Zhang Yong,Huangfu Mingzhu. Beneficiation Tests of Iron Increase and Silicon Reduction for Iron Concentrate from Ekou Iron Mine[J]. Metal Mine, 2014, 43(4): 78-81 |
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| Authors: | Yu Li Hu Yiming Liu Jun Zhang Yong Huangfu Mingzhu |
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| Affiliation: | 1.Sinosteel Maanshan Institute of Mining Research Co.，Ltd.，Maanshan 243000，China；2.College of Resources and Civil Engineering，Northeastern University，Shenyang 110819，China |
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| Abstract: | Through the process of stage grinding-low intensity magnetic separation-fine screen classification-elutriation magnetic separation was used by Ekou Iron Plant，Fe grade of iron concentrate reached above 66%，while the SiO2 content is high，at about 7%. In order to decrease the SiO2 content at final iron concentrate to be below 5%，experiments of iron increase and silicon reduction were conducted using feed of elutriation magnetic separator as the sample. The results showed that mixed iron concentrate with 69.58% of iron，4.23% of SiO2，iron recovery of 97.05% was received through the inverse flotation process of one roughing，one cleaning，three scavenging，and then one roughing，one cleaning of low intensity magnetic separation for reverse flotation tailings after regrinding to 82.60% 0.038 5 mm，using collector MD，developed by Sinosteel Maanshan Institute of Mining Research Co.，Ltd.，sodium hydroxide，corn starch，and lime as reagents. By this method，SiO2 content in iron concentrate can reach the expected target. |
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| Keywords: | Iron concentrate Iron increase and silicon reduction Reverse flotation Regrinding Low intensity magnetic separation |
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