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峨口铁精矿提铁降硅选矿试验
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
作者姓名:虞力  胡义明  刘军  张永  皇甫明柱
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
基金项目:* “十二五”国家科技支撑计划项目(编号:2012BAB14B00)。
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。

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
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
Authors:Yu Li  Hu Yiming  Liu Jun  Zhang Yong  Huangfu Mingzhu
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
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.
Keywords:Iron concentrate  Iron increase and silicon reduction  Reverse flotation  Regrinding  Low intensity magnetic separation
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