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The Use of High-All...
The Use of High-Alloyed EAF Slag for the Neutralization of On-Site Produced Acidic Wastewater: The First Step Towards a Zero-Waste Stainless-Steel Production Process
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- De Colle, Mattia, 1989- (author)
- KTH,Materialens processvetenskap
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- Jönsson, Pär (author)
- KTH,Materialens processteknologi
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- Karasev, Andrey (author)
- KTH,Materialens processteknologi
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- Gauffin, Alicia (author)
- KTH,Tillämpad processmetallurgi
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- Renman, Agnieszka (author)
- KTH,Vatten- och miljöteknik
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- Renman, Gunno (author)
- KTH,Vatten- och miljöteknik
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(creator_code:org_t)
- 2019-09-23
- 2019
- English.
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In: Applied Sciences. - : MDPI. - 2076-3417. ; 9:19
- Related links:
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https://doi.org/10.3...
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https://kth.diva-por... (primary) (Raw object)
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https://www.mdpi.com...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Subject headings
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- Recycling of steelmaking slags has well-established applications, such as their use in cement, asphalt, or fertilizer industries. Although in some cases, such as the electric arc furnace (EAF) high-alloyed stainless-steel production, the slag’s high metal content prevents its use in such applications. This forces companies to accumulate it as waste. Using concepts such dematerialization, waste management, industrial symbiosis, and circular economy, the article drafts a conceptual framework on the best route to solving the landfilling issue, aiming at a zero-waste process re-design. An experimental part follows, with an investigation of the use of landfill slag as a substitute of limestone for the neutralization of acidic wastewater, produced by the rinsing of steel after the pickling process. Neutralization of acidic wastewater with both lime and slag samples was performed with two different methods. Two out of four slag samples tested proved their possible use, reaching desired pH values compared to lime neutralizations. Moreover, the clean waters resulting from the neutralizations with the use of both lime and slag were tested. In terms of hazardous element concentrations, neutralization with slag yielded similar results to lime. The results of these trials show that slag is a potential substitute of lime for the neutralization of acidic wastewater.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Keyword
- EAF slag; recycling; re-use; wastewater treatment; sustainable production; dematerialization; zero waste; circular economy
- Teknisk materialvetenskap
- Materials Science and Engineering
Publication and Content Type
- ref (subject category)
- art (subject category)
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