• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Nickel hydrometallurgical waste residue characterization, geochemical reactive transport modeling and disposal risk management.
【24h】

Nickel hydrometallurgical waste residue characterization, geochemical reactive transport modeling and disposal risk management.

机译：镍湿法冶金废渣表征，地球化学反应性运输模型和处置风险管理。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

There has been limited experience in the use of hydrometallurgy to process nickel sulfide concentrate, thus the hydrometallurgical process residue is generally not well characterized in the open literature. This research will assist in ensuring the long-term stability of the waste and increase the understanding of its degradation and reactivity on disposal. The research pertains to the mobility of metals and sulfur compounds, their stability in minerals and phases associated with hydrometallurgical residues and the development of a risk-based methodology for selection of mine waste disposal designs. The research focuses on sulfur compounds and ore metals, such as nickel, cobalt and copper, which are target metals for the proposed hydrometallurgical processing facility in Long Harbour, Newfoundland. It will be particularly important to understand the effect of high sulfur waste material in Newfoundland's wet, temperate climate and generally slightly acidic surface water conditions. The research objectives are to characterize the mobility of metals from hydrometallurgical residue and assess residue reactivity/stability under different disposal conditions in order to determine the most favourable waste disposal procedures. Specific research objectives include: 1) characterization of the waste residues through mineralogical studies and elemental analysis; 2) assessment of acid and metal generating potential of the waste through static and kinetic tests and geochemical modeling; 3) assessment of decant water conditions in the residue impoundment through a calibrated numerical model; 4) evaluation of residue subsurface disposal conditions on a spatial and temporal basis through numerical modeling calibrated by in-situ field testing; and 5) prediction of the fate of heavy metals in the receiving environments. Finally, a risk-based, multi-criteria decision making approach is developed to assess various mine waste disposal options and applied through a case study.;Geochemical modeling of process residues is not widely reported in the literature due in part to the complexity of the mineralogical assemblage. This work, through calibrated models, was successfully able to model the residue that led to a greater understanding of factors impacting the chemistry of groundwater and surface water and enabled the prediction of longer term subsurface conditions in the residue impoundment.;The design of a mine waste disposal site is waste and site specific and is complex. Using a risk-based decision-making to assess design options for a mine waste disposal project is novel and effective approach. This approach integrated the results from the mineralogical characterization and contaminant fate and transport modeling and included uncertainty in the human health and ecological risk analysis; then incorporated this risk analysis in a multi-criteria decision making analysis to evaluate the optimal mine waste disposal alternative.;As there is very limited experience in the processing of nickel sulfide concentrate through hydrometallurgy the high sulfur, process residue is generally not well characterized. The mineralogical and sequential extraction work provided key residue mineral and microstructure information; suggested how target metals are present in the residue minerals and phases; and provided metal partitioning results which are important in understanding the residues metal leaching potential. The static and kinetic testing conducted further characterized the residues by assessing their acid generating and metal leaching capacity.
机译：使用湿法冶金法处理硫化镍精矿的经验有限，因此在公开文献中通常无法很好地表征湿法冶金法残留物。这项研究将有助于确保废物的长期稳定性，并增加对废物降解和处置反应性的了解。该研究涉及金属和硫化合物的移动性，它们在矿物和与湿法冶金残留物有关的相中的稳定性以及开发基于风险的方法来选择矿山废物处置设计。该研究的重点是硫化合物和矿石金属，例如镍，钴和铜，它们是纽芬兰长港拟建的湿法冶金加工设施的目标金属。了解高含硫废料在纽芬兰湿润，温带气候和通常略带酸性的地表水条件下的影响将特别重要。研究目的是表征湿法冶金残留物中金属的迁移率，并评估不同处置条件下的残留反应性/稳定性，以确定最有利的废物处置程序。具体的研究目标包括：1）通过矿物学研究和元素分析表征废物残留； 2）通过静态和动态测试以及地球化学模型评估废物的酸和金属生成潜力； 3）通过校准的数值模型评估残留物蓄积物中倾析水的状况； 4）通过现场现场测试校准的数值模型，在时空上评估残留物地下处置条件； 5）预测接收环境中重金属的命运。最后，开发了一种基于风险的多准则决策方法来评估各种矿山废物处置方案并通过案例研究加以应用。在工艺上，残余物的地球化学模型在文献中并未得到广泛报道，部分原因是其复杂性。矿物学组合。通过校准的模型，这项工作成功地对残渣进行了建模，从而使人们对影响地下水和地表水化学特性的因素有了更深入的了解，并能够预测残渣蓄水池中的长期地下状况。废物处置场所是废物和特定场所，并且很复杂。使用基于风险的决策来评估矿山废物处理项目的设计方案是新颖有效的方法。这种方法综合了矿物学特征，污染物归宿和运输模型的结果，并包括了人类健康和生态风险分析中的不确定性；然后将这一风险分析纳入多准则决策分析中，以评估最佳的矿山废物处置方案。由于湿法冶金高硫磺加工硫化镍精矿的经验非常有限，因此通常无法很好地表征过程残渣。矿物学和顺序提取工作提供了关键的残留矿物和微观结构信息；建议目标金属如何存在于残余矿物和相中；并提供了金属分配结果，这对于理解残留金属的浸出潜力非常重要。进行的静态和动态测试通过评估残渣的产酸能力和金属浸出能力进一步表征了残渣。

著录项

  • 作者

    Steel, Abigail.;

  • 作者单位

    Memorial University of Newfoundland (Canada).;

  • 授予单位 Memorial University of Newfoundland (Canada).;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 2010
  • 页码 271 p.
  • 总页数 271
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 普通生物学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号