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金属矿山 ›› 2015, Vol. 44 ›› Issue (05): 101-104.

• 矿物工程 • 上一篇    下一篇

焙烧方式对石煤提钒效果的影响

黄献宝1,2,陈铁军1,2,张一敏1,2,马浩1,2,苏涛1,2,刘娟1,2   

  1. 1.武汉科技大学资源与环境工程学院,湖北 武汉,430081;2.湖北省页岩钒资源高效清洁利用工程技术研究中心,湖北 武汉,430081
  • 出版日期:2015-05-15 发布日期:2015-08-04
  • 基金资助:

    * “十二五”国家科技支撑计划重点项目(编号:2011BAB05B04)。

Effect of Roasting Mode on Vanadium Extraction from Stone Coal

Huang Xianbao1,2,Chen Tiejun1,2,Zhang Yimin1,2,Ma Hao1,2,Su Tao1,2,Liu Juan1,2   

  1. 1.College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan 430081,China;2.Hubei Provincial Engineering Technology Research Center of High Efficient Cleaning Utilization for Shale Vanadium Resource,Wuhan 430081,China
  • Online:2015-05-15 Published:2015-08-04

摘要: 湖北某石煤矿石V2O5品位为0.72%,钒主要赋存在白云母等铝硅酸盐矿物中。为了低耗、高效提取其中的钒,对粒度为0.45~1 mm的试样进行了静态和流态化焙烧对比试验。结果表明,在较低的焙烧温度和较短的焙烧时间情况下,流态化焙烧可以取得较理想的焙烧效果,在750 ℃下流态化焙烧15 min,钒浸出率可达83.52%;在800 ℃下静态焙烧60 min,钒浸出率为74.93%。对焙烧产物的XRD和SEM分析表明:焙烧可以改善石煤浸钒效果的主要原因在于,焙烧可以破坏石煤中白云母的结构,将以类质同象形式赋存在白云母晶格中的钒释放出来,为酸性浸出液进入焙烧产物内部并浸出钒创造了条件。因此,流态化焙烧是改善石煤浸钒效果的低耗、高效手段。

关键词: 流态化焙烧, 静态焙烧, 石煤, 提钒

Abstract: A stone coal from Hubei Province contains 0.72% V2O5.The vanadium mainly occurs in aluminum silicate minerals like muscovite.In order to efficiently extract the vanadium from stone coal with low energy consumption,comparison tests of fluidized roasting & static roasting were conducted on the ore,with particle size from 0.45 to 1 mm.The results indicated that,fluidized roasting can obtain ideal index in low roasting temperature with short time.The leaching rate of vanadium is 83.52% when fluidized roasting at 750 ℃ for 15 min and is 74.93% when static roasting at 800 ℃ for 60 min.XRD and SEM analysis of roasted products showed that main reason for better performance of vanadium extraction by roasting is that roasting can destroy the structure of muscovite,liberate the vanadium from white mica crystal lattice,and make it possible on acid leaching liquid get into the interior of muscovite and make extraction more easily.Therefore,fluidized roasting can highly improve vanadium extraction effect with low consumption.

Key words: Fluidized roasting, Static roasting, Stone coal, Vanadium extraction