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首页> 外文学位 >An evaluation of characterization and modelling methods for laboratory and industrial scale froth flotation.
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An evaluation of characterization and modelling methods for laboratory and industrial scale froth flotation.

机译：评价实验室和工业规模的泡沫浮选的表征和建模方法。

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摘要

This thesis gives the results of engineering research conducted to examine and determine superior methods to characterize and model the froth flotation process. This work first began on the laboratory scale to evaluate thirteen kinetic flotation models, found in the literature, for their application to flotation results from a variety of base metal sulfide ores simulating several flotation circuits. The two criteria used for ranking were statistically based measures of goodness of fit, and model parameters having narrow or reliable confidence limits. All of the models tested gave a good fit to the data, but the two parameter first-order models, particularly the model having a rectangular component floatability assumption, is identified as most reliable for the laboratory scale data. The superior model is then applied to the flotation of two copper ores using a variety of collector and frother combinations. Conclusions regarding the chemistry, point of addition, effect of particle size, response in acid circuits and specific mineral affinity are presented.; The work was then extended to the industrial scale and an independent sampling campaign of the Pinto Valley copper concentrator was made. Analysis of this data revealed that conventional mass balancing techniques are not appropriate due to error associated with plant operations and sampling. Rather computational methods distributing error gave better results. The least absolute sum method is superior to the other methods for mass balancing with the current data. Compared to an evaluation done earlier on industrial data found in the literature, the model evaluation showed that the order of preference for the two best models was reversed. The mass balance data and model results give relevant information about plant copper and molybdenum circuit performance. Finally, the overall methodology developed here was used to evaluate the performance of 50,000 tpd copper ore concentrator in Arizona and justify a substantial capital project to improve flotation performance.
机译：本文给出了工程研究的结果，以检查和确定用于表征和浮选泡沫过程的优良方法。这项工作首先从实验室规模开始，以评估在文献中发现的13种动力学浮选模型，以将其应用于模拟多种浮选回路的多种贱金属硫化矿石的浮选结果。用于排名的两个标准是基于统计的拟合优度度量，以及具有狭窄或可靠置信度限制的模型参数。所有测试的模型都很好地拟合了数据，但是对于实验室规模的数据，两个参数一阶模型（尤其是具有矩形成分可浮性假设的模型）被认为是最可靠的。然后，使用多种收集器和起泡器组合，将上乘模型应用于两种铜矿石的浮选。给出了有关化学性质，加成点，粒径影响，酸回路反应和特定矿物亲和力的结论。然后将工作扩展到工业规模，并进行了平托谷铜选矿厂的独立采样活动。对这些数据的分析表明，由于与工厂运营和采样相关的错误，常规质量平衡技术不合适。相反，分配误差的计算方法给出了更好的结果。最小绝对和方法优于其他方法来与当前数据进行质量平衡。与先前对文献中发现的工业数据进行的评估相比，模型评估表明，对两种最佳模型的偏好顺序相反。质量平衡数据和模型结果提供了有关工厂铜和钼电路性能的相关信息。最后，此处开发的总体方法用于评估亚利桑那州50,000吨/天的铜矿选矿厂的性能，并证明有一项重大的资本项目可改善浮选性能。

著录项

  • 作者

    Dowling, Edward Camp, Jr.;

  • 作者单位

    The Pennsylvania State University.;

  • 授予单位 The Pennsylvania State University.;
  • 学科 Engineering Mining.; Engineering Metallurgy.
  • 学位 Ph.D.
  • 年度 1998
  • 页码 348 p.
  • 总页数 348
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 矿业工程;冶金工业;
  • 关键词

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