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首页> 外文会议>Symposium on Sulfide Smelting 2002, Feb 17-21, 2002, Seattle, Washington >OPTIMIZATION OF METALLURGICAL PROCESSES USING HIGH RATE BIOTECHNOLOGY
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OPTIMIZATION OF METALLURGICAL PROCESSES USING HIGH RATE BIOTECHNOLOGY

机译：高速生物技术对冶金工艺的优化

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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 upon 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. Practical 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 electrolyte magnesium bleed. Concentrated zinc sulfide (10 tpd) is produced biologically, eliminating the production of gypsum and closing the refinery sulfur cycle. Recovery of metals from solution at Kovehute Pribram in the Czech Republic is the second practical example. In this case, H_2S is produced on-site for metal removal from an alkaline slag dump leachate. At the Caribou mine in New Brunswick, Canada, acid mine drainage is treated with biogenic sulfide. This plant is situated upstream of a lime neutralization plant. As a result, reusable ZnS is produced, the volume of the sludge (gypsum and hydroxides) from the lime plant is reduced by 50%, the sludge is free of heavy metals and the final effluent concentration of heavy metals is in the ppb range. 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。本文重点介绍了高速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。给出了实际的例子。描述了在Pasminco的Budel Zink炼油厂中生物技术的大规模应用。在此，酸工厂排污与电解质镁渗出一起处理。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。在捷克共和国的Kovehute Pribram，从溶液中回收金属是第二个实际例子。在这种情况下，现场生产了H_2S，用于从碱性矿渣堆浸液中去除金属。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。该工厂位于石灰中和厂的上游。结果，产生了可重复使用的ZnS，石灰工厂的污泥（石膏和氢氧化物）量减少了50％，污泥中不含重金属，并且最终的重金属排放浓度在ppb范围内。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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