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首页> 外文会议>41th Annual Conference of Metallurgists of CIM International Symposium on New Technology Implementation Metallurgical Processes Aug 11-14, 2002 Montreal, Quebec, Canada >Optimization of metallurgical processes using high rate biotechnology
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Optimization of metallurgical processes using high rate biotechnology

机译：使用高速率生物技术优化冶金工艺

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摘要

Existing metallurgical operations can be optimized by implementing engineered bioreactor systems in the process configuration. For instance, metals can be recovered safely and economically from process and waste streams using biogenic sulfide. This paper focuses on possible applications of high rate biotechnology in metallurgy and mining. Metal recovery from liquid streams (process bleed streams, leach water, waste streams), integrated removal of (fugitive) SO_2, treatment of acid blowdown and other options will be described. Commercial examples are given. A large-scale application of biotechnology at Pasminco's Budel Zink refinery is described. Here acid plant blowdown is treated together with magnesium electrolyte bleed. Concentrated zinc sulfide (10 tpd) is produced biologically, eliminating the production of gypsum and closing the refinery sulfur cycle. At the Caribou Mine in New Brunswick, Canada, acid mine drainage is treated with biogenic sulfide. This plant is situated upstream of a conventional lime neutralization plant. As a result, saleable ZnS is produced to offset lime treatment costs, the volume of the sludge (gypsum and hydroxides) from the lime plant is reduced significantly, the sludge is free of heavy metals and the final effluent concentration of heavy metals meets current discharge criteria for all metals. In the second phase of this project, metals will be recovered from stored tailings, resulting in significant revenues.
机译：通过在工艺配置中实施工程化的生物反应器系统，可以优化现有的冶金操作。例如，可以使用生物硫化物从工艺和废物流中安全经济地回收金属。本文着重研究高速率生物技术在冶金和采矿中的可能应用。将描述从液体流（工艺排放流，浸出水，废物流）中的金属回收，（逸散性）SO_2的综合去除，酸排污的处理以及其他选择。给出了商业例子。描述了在Pasminco的Budel Zink炼油厂中生物技术的大规模应用。在这里，酸工厂的排污与镁电解质的渗出一起处理。浓缩硫化锌（10吨/天）是通过生物方法生产的，从而消除了石膏的生产并缩短了炼油厂的硫循环。在加拿大新不伦瑞克（New Brunswick）的Caribou矿，酸性矿井的排水经过生物硫化物处理。该工厂位于常规石灰中和工厂的上游。结果，产生了可销售的ZnS，以抵消石灰处理的成本，石灰厂的污泥（石膏和氢氧化物）量大大减少，污泥中不含重金属，并且最终的重金属排放浓度满足当前排放要求所有金属的标准。在该项目的第二阶段，将从储存的尾矿中回收金属，从而获得可观的收入。

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