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首页> 外文期刊>Environmental Science & Technology >Influence of a Modification of the Petcoke/Coal Ratio on the Leachability of Fly Ash and Slag Produced from a Large PCC Power Plant
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Influence of a Modification of the Petcoke/Coal Ratio on the Leachability of Fly Ash and Slag Produced from a Large PCC Power Plant

机译：石油焦/煤比例的变化对大型PCC电厂产生的粉煤灰和矿渣的浸出率的影响

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摘要

Co-firing of coal with inexpensive secondary fuels such as petroleum coke is expected to increase in the near future in the EU given that it may provide certain economic and environmental benefits with respect to coal combustion. However, changes in the feed fuel composition of power plants may modify the bulk content and the speciation of a number of elements in fly ash and slag. Consequently, leachability of these byproducts also can be modified. This study is focused on identifying the changes in the environmental quality of co-fired fly ash and slag induced by a modification of the petcoke/coal ratio. Petcoke was found to increase the leachable content of V and Mo and to enhance the mobility of S and As. However, with the exception of these elements, the addition of this secondary fuel did not drastically modify the bulk composition or the overall leachability of the resulting fly ash and slag.
机译：鉴于在煤燃烧方面可以提供一定的经济和环境效益，预计在不久的将来欧盟将与廉价的二次燃料（如石油焦）共烧煤。但是，发电厂的进料燃料成分的变化可能会改变粉煤灰和矿渣中的总含量和多种元素的形态。因此，也可以改变这些副产物的浸出性。这项研究的重点是确定通过改变焦炭/煤比引起的共烧粉煤灰和矿渣的环境质量变化。发现石油焦可增加V和Mo的可浸出含量并增强S和As的迁移率。但是，除这些元素外，添加这种二次燃料并没有彻底改变所得粉煤灰和炉渣的整体组成或整体浸出性。

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