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Spent potlining utilisation possibilities

机译：浪费的电镀利用率

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摘要

As the world's capacity for aluminium production increases, the amount of waste connected with this industry is also increasing. Spent potlining (SPL) from aluminium reduction cell cathodes presents a major environmental concern in the primary aluminium industry. It is concluded, after laboratory tests, that leachable cyanide and fluoride compounds present the major problem in SPL disposal. The behaviour of cyanide and fluoride under high temperature treatment has been investigated. On the basis of this laboratory investigation, the possibilities for SPL utilisation in red brick manufacturing, cement industry and thermal power stations were evaluated. SPL refractory material is already re-used in red brick manufacturing. In the cement industry, a pilot test on the utilisation of 25 t SPL carbon waste mixed with green petrol coke gave positive results. Additionally a fluoride emission forecast for a thermal power station utilising carbon waste SPL mixed with coal was elaborated.
机译：随着世界铝生产能力的提高，与此行业相关的废物数量也在增加。铝电解槽阴极的废镀层（SPL）在原铝行业中引起了主要的环境关注。在实验室测试后得出的结论是，可浸出的氰化物和氟化物是SPL处理中的主要问题。研究了高温条件下氰化物和氟化物的行为。在此实验室调查的基础上，评估了SPL在红砖制造，水泥工业和热电厂中的利用可能性。 SPL耐火材料已经在红砖制造中重复使用。在水泥工业中，利用25吨SPL碳废料与绿色汽油焦混合的试点试验取得了积极的结果。另外，还详细说明了利用碳废物SPL和煤混合的火力发电厂的氟化物排放预测。

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