TY - JOUR

T1 - Phosphorus removal via the gas phase during the reduction of Cr- and P-rich slags

AU - Ponak, Christoph

AU - Mally, Valentin

AU - Raupenstrauch, Harald

AU - Morita, Kazuki

N1 - Publisher Copyright: © 2020 GDMB Gesellschaft fur Bergbau, Metallurgie, Rohstoff- und Umwelttechnik e.V.. All rights reserved.

PY - 2020/5/1

Y1 - 2020/5/1

N2 - The purpose of the presented research is to assess a suggested processing route, enabling the production of a low-phosphorus metal product by full reduction of basic oxygen furnace slags (BOFS) with simultaneous removal of gaseous phosphorus. Said processing route includes a reduction step that applies a novel reactor concept called InduRed. It is suggested to reduce BOFS in a well-established reduction unit like an electric arc furnace and to refine the obtained, P-rich metal product so that chromium and phosphorus are selectively enriched in the produced slag. This slag shall contain as little iron as possible but, naturally, will also accumulate manganese. The composition of such a slag was assessed theoretically. Based on these theoretical assumptions, a synthetic, Cr-, Mn- and P-rich slag was produced. Reduction experiments using these synthetic slags were conducted in order to test the feasibility of the process, the advantage of the application of the InduRed reactor concept over standard reduction and the influence of Mn and Cr on P gasification. Highly promising results were obtained. Standard reduction by carbon addition led to a gasification rate of roughly 10%. Applying the InduRed reactor concept, gasification rates of close to 45 % were achieved. The product slag is virtually Cr- and P-free and contains roughly 0.5 m.-% Fe and Mn.The advantage of the InduRed reactor application was attested and will be further investigated.

AB - The purpose of the presented research is to assess a suggested processing route, enabling the production of a low-phosphorus metal product by full reduction of basic oxygen furnace slags (BOFS) with simultaneous removal of gaseous phosphorus. Said processing route includes a reduction step that applies a novel reactor concept called InduRed. It is suggested to reduce BOFS in a well-established reduction unit like an electric arc furnace and to refine the obtained, P-rich metal product so that chromium and phosphorus are selectively enriched in the produced slag. This slag shall contain as little iron as possible but, naturally, will also accumulate manganese. The composition of such a slag was assessed theoretically. Based on these theoretical assumptions, a synthetic, Cr-, Mn- and P-rich slag was produced. Reduction experiments using these synthetic slags were conducted in order to test the feasibility of the process, the advantage of the application of the InduRed reactor concept over standard reduction and the influence of Mn and Cr on P gasification. Highly promising results were obtained. Standard reduction by carbon addition led to a gasification rate of roughly 10%. Applying the InduRed reactor concept, gasification rates of close to 45 % were achieved. The product slag is virtually Cr- and P-free and contains roughly 0.5 m.-% Fe and Mn.The advantage of the InduRed reactor application was attested and will be further investigated.

UR - http://www.scopus.com/inward/record.url?scp=85095829686&partnerID=8YFLogxK

M3 - Article

VL - 73.2020

SP - 128

EP - 133

JO - World of Metallurgy - ERZMETALL

JF - World of Metallurgy - ERZMETALL

SN - 1613-2394

IS - 3

ER -