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首页> 外文会议>Italian Conference on Chemical and Process Engineering(ICheaP-6) vol.2; 20030608-11; Pisa(IT) >Pollution prevention in EAF industries
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Pollution prevention in EAF industries

机译：电炉行业的污染预防

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In Italy electric arc furnaces (EAF) industries represent a relevant industrial activity, mainly in the north of Italy where there are about 25 production plants. These production plants pose a rather challenging problem related to both their environmental impact as well as the worker's exposure to toxic pollutants. This results in a requirement of reducing pollutant emission during the production cycle, with particular reference to the atmospheric emissions. The electric arc furnace itself is the main responsible for atmospheric pollutant production, which is represented not only by dust and fumes (mainly derived from oxides nucleation and condensation) but also by heavy metals and PAH. This can be easily understood since the raw material used in EAF industries is scrap, which is often contaminated by oils and plastics. Atmospheric emissions from EAF industries can be roughly classified into collected and fugitive. The formers are emissions captured by a suitable ventilation system, while the latter escape from this system and enter the environment. The ventilation system usually involves a primary system capturing emissions directly from the furnace and a secondary one that should capture all the emissions not controlled by the primary one. Both these systems lead the emission to a suitable abatement device able to remove more than 99% of the pollutant. Therefore, the environmental impact of the collected emissions is often negligible. In this work different solutions for dust control are discussed with reference to measurements carried out in real-size plants showing the relevance of fugitive emissions in evaluating the overall environmental impact of EAF industries.
机译：在意大利，电弧炉（EAF）行业代表着相关的工业活动，主要是在意大利北部，那里大约有25个生产工厂。这些生产工厂提出了一个相当具有挑战性的问题，既关系到其对环境的影响，又关系到工人接触有毒污染物。这导致需要在生产周期中减少污染物排放，特别是考虑到大气排放。电弧炉本身是造成大气污染物产生的主要因素，不仅以粉尘和烟雾（主要来自于氧化物成核和冷凝）代表，而且还以重金属和多环芳烃为代表。这很容易理解，因为电弧炉行业中使用的原材料是废料，通常会被油和塑料污染。电炉行业的大气排放可大致分为收集的和逃逸的。前者是通过合适的通风系统捕获的排放物，而后者则从该系统中逸出并进入环境。通风系统通常包括一个主要系统，该系统直接捕获来自炉子的排放物，另一个系统应捕获所有不受主要系统控制的排放物。这两个系统都将排放物引向合适的减排设备，该设备能够去除99％以上的污染物。因此，收集的排放物对环境的影响通常可以忽略不计。在这项工作中，参考了在实际规模的工厂中进行的测量，讨论了用于粉尘控制的不同解决方案，这些测量表明了逃逸排放在评估电弧炉行业整体环境影响方面的重要性。

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