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首页> 外文期刊>Journal of Hazardous Materials >A perspective of stepwise utilisation of Bayer red mud: Step-two Extracting and recovering Ti from Ti-enriched tailing with acid leaching and precipitate flotation
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A perspective of stepwise utilisation of Bayer red mud: Step-two Extracting and recovering Ti from Ti-enriched tailing with acid leaching and precipitate flotation

机译：逐步利用拜耳赤泥的观点：第二步：通过酸浸和沉淀浮选从富钛尾矿中提取和回收钛

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摘要

The extraction and recovery of Ti from Ti-enriched tailing with acid leaching and precipitate flotation, as one of the critical steps, was proposed for the stepwise utilization of red mud. The factors influencing acid leaching and precipitate flotation were examined by factorial design. The leaching thermodynamics, kinetics of Ti4+, Al3+ and Fe3+, and the mechanism of selectively Fe3+ removal using [Hbet][Tf2N] as precipitating reagent were discussed. The extracting of Ti4+, Al3+ and Fe3+ in concentrated H2SO4 is controlled by diffusion reactions, depending mainly upon leaching time and temperature. The maximum extracting efficiency of Ti4+ is approximately 92.3%, whereas Al3+ and Fe3+ leaching are respectively 75.8% and 84.2%. [Hbet][Tf2N], as a precipitating reagent, operates through a coordination mechanism in flotation. The pH value is the key factor influencing the flotation recovery of Ti4+, whereas the dosage of precipitating reagent is that for Al3+ recovery. The maximum flotation recovery of Ti4+ is 92.7%, whereas the maximum Al3+ recovery is 93.5%. The total recovery rate for extracting and recovering titanium is 85.5%. (C) 2016 Elsevier B.V. All rights reserved.
机译：提出了利用酸浸和沉淀浮选法从富钛尾矿中提取和回收钛的关键步骤之一，是逐步利用赤泥。通过析因设计研究了影响酸浸和沉淀物浮选的因素。讨论了以[Hbet] [Tf2N]为沉淀剂的浸出热力学，Ti4 +，Al3 +和Fe3 +的动力学以及选择性去除Fe3 +的机理。浓H2SO4中Ti4 +，Al3 +和Fe3 +的萃取受扩散反应控制，主要取决于浸提时间和温度。 Ti4 +的最大浸出率约为92.3％，而Al3 +和Fe3 +的浸出率分别为75.8％和84.2％。 [Hbet] [Tf2N]作为沉淀剂，通过浮选中的配位机制起作用。 pH值是影响Ti4 +浮选回收率的关键因素，而沉淀剂的用量则是回收Al3 +的剂量。 Ti4 +的最大浮选回收率为92.7％，而Al3 +的最大浮选率为93.5％。提取和回收钛的总回收率为85.5％。 （C）2016 Elsevier B.V.保留所有权利。

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  • 来源
    《Journal of Hazardous Materials》 |2016年第15期|318-327|共10页
  • 作者

    Huang Yanfang; Chai Wencui; Han Guihong; Wang Wenjuan; Yang Shuzhen; Liu Jiongtian;

  • 作者单位

    Zhengzhou Univ, Sch Chem Engn & Energy, Zhengzhou 450001, Peoples R China;

    Zhengzhou Univ, Sch Chem Engn & Energy, Zhengzhou 450001, Peoples R China;

    Zhengzhou Univ, Sch Chem Engn & Energy, Zhengzhou 450001, Peoples R China;

    Zhengzhou Univ, Sch Chem Engn & Energy, Zhengzhou 450001, Peoples R China;

    Zhengzhou Univ, Sch Chem Engn & Energy, Zhengzhou 450001, Peoples R China;

    Zhengzhou Univ, Sch Chem Engn & Energy, Zhengzhou 450001, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Red mud; Ti recovery; Acid leaching; Precipitate flotation;

    机译：赤泥;钛回收;酸浸;沉淀浮选;

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