| 云南某难选铁矿石煤基直接还原-弱磁选试验 |
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| 引用本文： | 王静静,杨慧芬,曹志成,肖晶晶,仵晓丹.云南某难选铁矿石煤基直接还原-弱磁选试验[J].金属矿山,2012,41(6):50-53. |
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| 作者姓名： | 王静静 杨慧芬 曹志成 肖晶晶 仵晓丹 |
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| 作者单位： | 1.北京神雾环境能源科技集团股份有限公司；2.北京科技大学土木与环境工程学院；3.河北钢铁集团矿业有限公司承德柏泉铁矿；4.北京东方燕京矿山工程设计有限公司 |
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| 摘 要： | 云南某铁矿石为混合型铁矿石，由于铁矿物嵌布粒度微细而难以采用常规选矿方法有效选别。为此，对该矿石进行了煤基直接还原-弱磁选试验，结果表明，将原矿与作为还原剂的云南某褐煤和作为助熔剂的CaO按100∶20∶10的质量比混合，在1 200 ℃的温度下直接还原焙烧50 min，焙烧矿在一段和二段磨矿细度分别为-325目占81.34%和-325目占92.41%、一段和二段弱磁选场强分别为187.10和143.31 kA/m的条件下进行两段磨矿-弱磁选，可获得铁品位为91.20%、铁回收率为87.05%的直接还原铁精矿，从而为该难选铁矿石的开发利用提供了技术支持。
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| 关 键 词： | 混合型难选铁矿石 直接还原焙烧 弱磁选 |
Experiment on Coal-based Direct Reduction-low Intensity Magnetic Separation of a Refractory Iron Ore in Yunnan Province |
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| Wang Jingjing
,
Yang Huifen
,
Cao Zhicheng
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Xiao Jingjing
,
Wu Xiaodan.Experiment on Coal-based Direct Reduction-low Intensity Magnetic Separation of a Refractory Iron Ore in Yunnan Province[J].Metal Mine,2012,41(6):50-53. |
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| Authors: | Wang Jingjing Yang Huifen Cao Zhicheng Xiao Jingjing Wu Xiaodan |
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| Affiliation: | 1.Beijing Shenwu Environment and Energy Technology Co.，Ltd.；2.Civil and Environmental Engineering Institute，University of Science and Technology Beijing；3.Chengde Baiquan Iron Mine，Hebei Iron and Steel Group Mining Co.，Ltd.；4.Beijing Oriental Yanjing Mining Design Co.，Ltd.; |
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| Abstract: | A iron ore of Yunnan is mixing iron ore,it is hard to separate by conventional recovery techniques for micro-fine iron ore.The method with coal-based direct reduction followed by low intensity magnetic separation is presented for this kind iron ore.The results show that the direct-reduction iron concentrate with grading 91.20% and recovery 87.05% is obtained under the conditions of roasted ore by two-stage grinding and low intensity magnetic separation process with the weight ratios of iron ore/lignite/CaO as 100∶20∶10,the reduction roasting temperature of 1 200 ℃ for 50 min,the roasted ores-grinding fineness of 325 mesh 81.34% and 92.41% in the first and second grinding classification,two stage low intensity magnetic separation of 187.10 and 143.31 kA/m.The study offer the technical support for development and utilization of refractory iron ore. |
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| Keywords: | Mixed refractory iron ore Direct reduction roasting Low intensity magnetic separation |
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