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Avoiding sloppy BOS process behavior
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Industriell miljö- och processteknik.
2010 (engelsk)Inngår i: Iron & Steel Technology, ISSN 1547-0423, Vol. 7, nr 11, s. 66-75Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

SSAB EMEA's BOS plant in Luleå, Sweden installed a new system in April 2009 for slopping registration in order to raise the level of metallurgical process control. An excellent and well-documented tool for investigating the causes behind slopping is image analysis. The system scans each received camera image (25 per second) and counts the number of light pixels above a set threshold within a designated area of the camera frame. The scanning output is a 1-second number called the slopping value (in %). A 2-second average value is stored for a period of up to 14 days. Data for a complete year of production on BOS vessel LDI (over 11,000 heats) were collected and scrutinized. The multivariate analysis showed that main static causes behind slopping are the large additions of scrap of lower quality, mainly recycled large-size skulls and pig iron, but also purchased scrap, high ratio of dolomitic fluxes and high Si content in hot metal in the case of HS blowing regime.

sted, utgiver, år, opplag, sider
2010. Vol. 7, nr 11, s. 66-75
HSV kategori
Forskningsprogram
Processmetallurgi
Identifikatorer
URN: urn:nbn:se:ltu:diva-14734Lokal ID: e2771d60-ebfb-11df-8b36-000ea68e967bOAI: oai:DiVA.org:ltu-14734DiVA, id: diva2:987707
Merknad
Validerad; 2010; 20101109 (matbra)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2017-11-24bibliografisk kontrollert

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Brämming, MatsBjörkman, Bo

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