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首页> 外文会议>Regulatory regional economic challenge for mining, investment, environment and work safety - call of paper from 2010 international symposium on project management. >Application of Flash Magnetizing Roasting Technique in Beneficiation of Siderite and Limonite
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Application of Flash Magnetizing Roasting Technique in Beneficiation of Siderite and Limonite

机译：快速磁化焙烧技术在菱铁矿和褐铁矿选矿中的应用

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摘要

Siderite and limonite are well known refractory ores featuring low theoretical grade and complicated association with gangue minerals which usually differ little from siderite and limonite in specific gravity,specific susceptibility,surface hydrophobicity and specific conductivity. Therefore,satisfactory beneficiation results for them can be hardly obtained by physical means. Even if iron concentrates almost having a theoretical grade are obtained at the cost of loss of iron recovery,they can not be used in sintering process in large quantity due to the structure of the ores. In view of the problem,a technique of flash magnetizing roasting is developed to transform siderite and limonite into artificial magnetite so as to enlarge the difference between siderite/limonite and gangue minerals and realize effective separation of the ores. Through comparing the results of separation after magnetizing roasting of siderite and limonite with those by physical means,it is found that the grade of iron concentrates is increased by 6-15%,the recovery of iron by 15-20%. The technique of flash magnetizing roasting,characterized by fast mass and heat transfer and short reaction time,has advantages such as low roasting cost and high feasibility.
机译：菱铁矿和褐铁矿是众所周知的难处理矿石，其理论品位低，与脉石矿物的结合复杂，通常在比重​​，比磁化率，表面疏水性和比电导率方面与菱铁矿和褐铁矿几乎没有区别。因此，很难通过物理手段获得令人满意的选矿结果。即使以损失铁回收的代价获得几乎具有理论品位的铁精矿，由于矿石的结构，它们也不能大量用于烧结过程。针对这一问题，人们开发了一种快速磁化焙烧技术，将菱铁矿和褐铁矿转变为人造磁铁矿，以扩大菱铁矿/褐铁矿与脉石矿物之间的差异，实现矿石的有效分离。通过对菱铁矿和褐铁矿的磁化焙烧后的分离结果与物理方法进行比较，发现铁精矿品位提高了6-15％，铁的回收率提高了15-20％。快速磁化焙烧技术具有质量，传热快，反应时间短的特点，具有焙烧成本低，可行性高的优点。

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