Recycling of Waste Oxides in Steelmaking - Final Report

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This research primarily examined the use of waste oxide briquettes (WOB), prepared from blast furnace and basic oxygen furnace (BOF) dusts and mill scale, in BOFs and in particular, the reasons for the methods to reduce slopping in BOF when WOBs are used. Also, the recycling of EAF and stainless steelmaking dusts were examined. It is found that at a critical FeO content in the slag, metal drops emulsify increasing the reaction area and rate drastically, promoting slopping. Recommendations were made to delay the build-up of FeO in the slag to this critical value, thus reducing slopping. Although recycling of ... continued below

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Fruehan, R. J. March 31, 2001.

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Description

This research primarily examined the use of waste oxide briquettes (WOB), prepared from blast furnace and basic oxygen furnace (BOF) dusts and mill scale, in BOFs and in particular, the reasons for the methods to reduce slopping in BOF when WOBs are used. Also, the recycling of EAF and stainless steelmaking dusts were examined. It is found that at a critical FeO content in the slag, metal drops emulsify increasing the reaction area and rate drastically, promoting slopping. Recommendations were made to delay the build-up of FeO in the slag to this critical value, thus reducing slopping. Although recycling of EAF dusts in the EAF increased energy use and decreased productivity, it provides Fe units, reduces dust disposal by 25-40%, and increases the Zn content of the dust to acceptable levels for the use by Zn-producers. Stainless steelmaking dusts can also be recycled as WOBs adding Cr to the melt and generating CO gas resulting in good slag foaming.

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OSTI as DE00789632

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  • Other Information: PBD: 31 Mar 2001

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  • Report No.: DOE/ID/13554
  • Report No.: Project No. 9760
  • Grant Number: FC07-97ID13554
  • DOI: 10.2172/789632 | External Link
  • Office of Scientific & Technical Information Report Number: 789632
  • Archival Resource Key: ark:/67531/metadc722899

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Office of Scientific & Technical Information Technical Reports

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  • March 31, 2001

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  • Sept. 29, 2015, 5:31 a.m.

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  • Jan. 3, 2017, 1:13 p.m.

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Fruehan, R. J. Recycling of Waste Oxides in Steelmaking - Final Report, report, March 31, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc722899/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.