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Vanadium recovery from oil sands fly ash.

机译：从油砂飞灰中回收钒。

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摘要

The fly ash produced during the upgrading of the Alberta oil sands contains between 2.0 and 3.5 wt% vanadium, and represents a significant vanadium resource (3.6 million kilograms per year or 3.5% of total world vanadium production). Research was performed to move vanadium recovery from the oil sands fly ash towards commercialization. Salt roasting tests on Suncor ash samples collected over a 25 year period were performed to determine the effects of time, temperature, and roasting additions on vanadium recovery and the optimum salt roasting conditions for the Suncor ash. Other roasting reagents, and lixiviants, were also tested to try to improve the vanadium extractions achieved with salt roasting. Syncrude ash was treated under similar salt roasting and leaching conditions to quantify the differences between ash formation in Suncor and Syncrude's coking processes, and to optimize the roasting and leaching conditions for the Syncrude ash. Several solution purification and vanadium precipitation flowsheets were tested to determine the feasibility of producing high purity vanadium from water leach solutions. Finally, characterization of the fly ash, for the first time, allowed a good understanding of the mineralogy of the oil sands fly ash and the mechanism behind the salt roasting of the fly ash to be attained.
机译：艾伯塔省油砂升级过程中产生的粉煤灰含有2.0至3.5 wt％的钒，并且代表着大量的钒资源（每年360万公斤，占世界钒总产量的3.5％）。进行了研究，以从油砂飞灰中回收钒，使其走向商业化。对在25年内收集的Suncor灰分样品进行盐焙烧测试，以确定时间，温度和焙烧添加剂对钒回收率的影响以及Suncor灰分的最佳盐焙烧条件。还测试了其他焙烧试剂和浸润剂，以尝试改善盐焙烧中钒的提取率。在相似的盐焙烧和浸出条件下处理Syncrude灰分，以量化Suncor和Syncrude的焦化过程中灰分形成之间的差异，并优化Syncrude灰分的焙烧和浸出条件。测试了几种溶液纯化和钒沉淀流程，以确定从浸出溶液生产高纯度钒的可行性。最后，粉煤灰的表征首次使人们对油砂粉煤灰的矿物学以及粉煤灰盐焙烧的机理有了很好的了解。

著录项

  • 作者

    Holloway, Preston Carl.;

  • 作者单位

    University of Alberta (Canada).;

  • 授予单位 University of Alberta (Canada).;
  • 学科 Engineering Chemical.
  • 学位 M.Sc.
  • 年度 2003
  • 页码 205 p.
  • 总页数 205
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 老年病学;
  • 关键词

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