Nitrogen Control in Electric Arc Furnace Steelmaking by DRI (TRP 0009)

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Description

Nitrogen is difficult to remove in electric arc furnace (EAF) steelmaking, requiring the use of more energy in the oxygen steelmaking route to produce low-nitrogen steel. The objective of this work was to determine if the injection of directly reduced iron (DRI) fines into EAFs could reduce the nitrogen content by creating fine carbon monoxide bubbles that rinse nitrogen from the steel. The proposed work included physical and chemical characterization of DRI fines, pilot-scale injection into steel, and mathematical modeling to aid in scale-up of the process. Unfortunately, the pilot-scale injections were unsuccessful, but some full-scale data was obtained. Therefore, ... continued below

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58 pages

Creation Information

Irons, Dr. Gordon A. March 31, 2004.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 35 times , with 10 in the last month . More information about this report can be viewed below.

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Description

Nitrogen is difficult to remove in electric arc furnace (EAF) steelmaking, requiring the use of more energy in the oxygen steelmaking route to produce low-nitrogen steel. The objective of this work was to determine if the injection of directly reduced iron (DRI) fines into EAFs could reduce the nitrogen content by creating fine carbon monoxide bubbles that rinse nitrogen from the steel. The proposed work included physical and chemical characterization of DRI fines, pilot-scale injection into steel, and mathematical modeling to aid in scale-up of the process. Unfortunately, the pilot-scale injections were unsuccessful, but some full-scale data was obtained. Therefore, the original objectives were met, and presented in the form of recommendations to EAF steelmakers regarding: (1) The best composition and size of DRI fines to use; (2) The amount of DRI fines required to achieve a specific reduction in nitrogen content in the steel; and (3) The injection conditions. This information may be used by steelmakers in techno-economic assessments of the cost of reducing nitrogen with this technology.

Physical Description

58 pages

Notes

OSTI as DE00840951

Source

  • Other Information: PBD: 31 Mar 2004

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  • Report No.: NONE
  • Grant Number: FC36-97ID13554
  • DOI: 10.2172/840951 | External Link
  • Office of Scientific & Technical Information Report Number: 840951
  • Archival Resource Key: ark:/67531/metadc782003

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Creation Date

  • March 31, 2004

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

Description Last Updated

  • July 25, 2016, 7:11 p.m.

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Irons, Dr. Gordon A. Nitrogen Control in Electric Arc Furnace Steelmaking by DRI (TRP 0009), report, March 31, 2004; United States. (digital.library.unt.edu/ark:/67531/metadc782003/: accessed August 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.