| 选择性分散絮凝—磁选工艺回收云南上厂铁尾矿中的铁 |
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| 引用本文： | 李奕然,叶国华,朱冰龙,胡艺博,童雄,蒋京航. 选择性分散絮凝—磁选工艺回收云南上厂铁尾矿中的铁[J]. 矿产保护与利用, 2018, 0(2): 63-68. DOI: 10.13779/j.cnki.issn1001-0076.2018.02.012 |
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| 作者姓名： | 李奕然 叶国华 朱冰龙 胡艺博 童雄 蒋京航 |
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| 作者单位： | 1.昆明理工大学 国土资源工程学院，云南 昆明 650093 |
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| 基金项目： | 国家自然科学基金项目51304090国家自然科学基金项目51604130云南省应用基础研究计划重点项目2014FA027 |
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| 摘 要： | 云南上厂铁尾矿粒度细，含铁低，仅16.56%，且铁主要以弱磁性的赤铁矿形式存在，属微细粒低品位难选铁尾矿。针对现有再选工艺的不足，依据尾矿的性质特点，提出了选择性分散絮凝—磁选的再选新工艺，并研究了关键因素对铁回收的影响，分析了相关原因。结果表明:最佳条件为磨矿细度-0.045 mm含量占95%、药剂YL-1用量800 g/t、冲次320次/min，在此条件下获得了较好指标，精矿铁品位、回收率分别达59.63%、50.41%；在新工艺中，细磨可以提高铁矿物的单体解离度，添加药剂YL-1能分散矿泥并选择性絮凝微细粒铁矿物颗粒，高冲次能减少非磁性矿粒的机械夹杂和因表面力作用而黏附在磁性矿物表面的概率，最终使铁回收指标提高。
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| 关 键 词： | 铁尾矿 赤铁矿 分散 絮凝 磁选 |
| 收稿时间： | 2017-12-05 |
Recovering Iron from Iron Tailings in Shangchang,Yunnan by Selective Dispersion and Flocculation-magnetic Separation Technology |
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| Affiliation: | 1.Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China2.Yuxi Dahongshan Mining Co., Ltd., Kunming Iron & Steel Group, Yuxi 653405, China3.State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming 650093, China |
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| Abstract: | The iron tailings in Shangchang, Yunnan, with the very fine particle sizes, the low Fe content of only 16.56%, and the main Fe existing form of weak magnetic hematite, is belonging to a type of the micro-fine low-grade refractory iron tailings. Aiming at shortages of the existing re-concentration technologies, and the properties of the tailings, a new re-concentration technology of selective dispersion and flocculation-magnetic separation, was put forward. Then the effects of key factors on iron recovery were investigated, and the related reasons were also analyzed. The results show that under the optimum conditions:grinding fineness of -0.045 mm accounting for 95%, dosage of YL-1 of 800 g/t, frequency of stroke of 320 times/min, the concentrate with the Fe grade and recovery of 59.63% and 50.41%, was obtained. In the new technology, the fine grinding, which can improve the liberation degree of iron mineral, adding reagent YL-1 can well achieve the dispersion of slimes and the selective flocculation of fine iron mineral, and high frequency of stroke can reduce the mechanical inclusions of non-magnetic particles and the probability of adhesion to the surface of the magnetic mineral due to surface force, all improve the indexes. |
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