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首页> 外文期刊>Corrosion Engineering, Science and Technology >Electrochemical treatment to condition contaminated EAFD as addition to immobilisation mortar in low level waste concrete containers
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Electrochemical treatment to condition contaminated EAFD as addition to immobilisation mortar in low level waste concrete containers

机译：电化学处理以处理受污染的EAFD，以及在低含量废混凝土容器中固定防砂浆

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摘要

The steel industry generates a substantial quantity of waste, the so called electric arc furnace dust (EAFD). The chemical composition of this dust varies even for the same factory from one batch to another, but in all cases, this dust contains hazardous metals, and in some cases, it contains other species such as chloride ions. In addition to the intrinsic hazardous characteristics of this waste, it may accidentally happen that the scrap contaminated by radioactive elements be melted during the process; in this case, the resulting EAFD has to be managed as a radioactive waste, and therefore, it has to be disposed in a repository, where reinforced concrete barriers play an important role. In some cases, if there are potentially damaging species for the engineering barriers in the EAFD, they have to be removed before immobilising it in the cementitious matrix. In this paper, a case study is presented where EAFD is treated electrochemically, after a leaching treatment, to remove chloride ions before using it as an addition in the immobilisation mortar. This mortar is used to fill voids among waste drums inside concrete containers before putting them in the disposal area (concrete vaults) of the El Cabril low level waste repository (Spain).
机译：钢铁行业会产生大量废物，即所谓的电弧炉粉尘（EAFD）。即使在同一工厂中，这种粉尘的化学成分也因批次不同而不同，但是在所有情况下，该粉尘都包含有害金属，在某些情况下，还包含其他物种，例如氯离子。除了这种废物的固有危险特性外，在过程中还可能会偶然发生被放射性元素污染的废料熔化的情况。在这种情况下，最终的EAFD必须作为放射性废物进行管理，因此，必须将其放置在钢筋混凝土屏障起着重要作用的储存库中。在某些情况下，如果EAFD中的工程屏障存在潜在破坏性物种，则必须在将其固定在水泥基体中之前将其清除。本文介绍了一个案例研究，其中在浸出处理后对EAFD进行电化学处理，以除去氯离子，然后将其用作固定砂浆中的添加剂。该砂浆用于填充混凝土容器内废料桶之间的空隙，然后将其放入El Cabril低层废料处置场（西班牙）的处置区域（混凝土拱顶）。

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