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Metal recovery from slags using DC arc furnace technology.

机译：使用直流电弧炉技术从炉渣中回收金属。

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This dissertation provides new insights into process engineering and fundamental issues related to metal recovery from slags using DC arc furnace technology. The incentive to develop and implement new slag cleaning processes is being driven by two main forces—increasingly stringent environmental legislation, and the financial motivation to profitably process waste streams to increase overall metal recoveries. The successful commercialization of DC arc furnace technology for electric furnace steelmaking, ferrochromium production, and ilmenite smelting, has opened the door for this technology to be applied to high temperature metal recovery processes for slag treatment.; Two chemical processing issues important to metal recovery from primary lead smelter slags have been investigated and documented in Section 2 and 3. The reduction of zinc oxide from lead blast furnace slags by FeO was shown not to play a dominant role in zinc evolution (in the absence of a reductant) from these slags. The recovery of cobalt (as a co-product) could significantly contribute to the profitability of a DC arc furnace process which aimed to recover zinc (as a metal) from a Viburnum Trend lead blast furnace slag.; Several issues relating to the physics of energy, mass, and momentum transport in DC arc furnaces are poorly understood. An experimental campaign on a laboratory scale DC arc furnace investigated the influence that the plasma arc has on temperature distributions, fluid flow, reductant behavior, and solids fed through the electrode. The results are presented in Section 4 and 5. The bath temperature, measured beneath the arc attachment zone, was a strong function of applied arc power. A steep vertical temperature gradient existed beneath the arc attachment zone. The location of the anode connection strongly influenced the direction of flow in the arc attachment zone. In addition to these results, a photographic technique was developed to document the arc-bath interactions in real-time.
机译：本文为利用直流电弧炉技术从渣中回收金属的过程工程和基本问题提供了新的见解。两种主要力量推动了开发和实施新的炉渣清洁工艺的动机-日益严格的环境法规，以及为使废物流以可盈利方式进行处理以提高总体金属回收率的财务动力。用于电炉炼钢，铬铁生产和钛铁矿冶炼的直流电弧炉技术的成功商业化，为将该技术应用于炉渣处理的高温金属回收工艺打开了大门。在第2节和第3节中，研究和记录了对从初级铅冶炼炉渣中回收金属很重要的两个化学处理问题。研究表明，FeO从铅高炉矿渣中还原氧化锌在锌的析出中不发挥主要作用（在这些炉渣中没有还原剂）。钴（作为副产品）的回收可显着提高旨在从Viburnum Trend铅高炉矿渣中回收锌（作为金属）的DC电弧炉工艺的盈利能力。与直流电弧炉中的能量，质量和动量传输的物理学有关的几个问题鲜为人知。在实验室规模的直流电弧炉上进行的一项实验活动研究了等离子弧对温度分布，流体流量，还原剂行为以及通过电极送入的固体的影响。结果显示在第4节和第5节中。在电弧附着区下方测得的熔池温度是施加电弧功率的重要函数。电弧附接区下方存在陡峭的垂直温度梯度。阳极连接的位置极大地影响了电弧连接区域中的流动方向。除了这些结果外，还开发了一种照相技术来实时记录弧-浴相互作用。

著录项

  • 作者

    Deneys, Adrian Christian.;

  • 作者单位

    University of Missouri - Rolla.;

  • 授予单位 University of Missouri - Rolla.;
  • 学科 Engineering Metallurgy.
  • 学位 Ph.D.
  • 年度 1998
  • 页码 141 p.
  • 总页数 141
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 冶金工业;
  • 关键词

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