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Prereduced Iron Ore Pellets: Preparation, Properties, Utilization.


PB198107

Publication Date 1970
Personal Author Fine, M. M.; Melcher, N. B.
Page Count 76
Abstract A process for simultaneously reducing and indurating iron ore pellets was developed by Bureau of Mines laboratory research and confirmed on a continuous pilot plant basis. Moist iron ore concentrate was balled, mixed with solid reductant, and heated at about 1,100 to 1,150C. On a small scale, a variety of concentrates and fuels were utilized successfully. The pilot rotary kiln tests were limited to natural magnetite, synthetic magnetite, lignite, and anthracite. In both cases, partially reduced pellets with excellent physical properties were regularly produced with average analyses of at least 80 percent total iron and 60 percent or more metallic iron. These and other prereduced pellets were smelted in the Bureau's experimental blast furnace facility, Bruceton, Pa. With prereduced spheres comprising 85 percent of the burden, the coke rate was approximately half that with standard oxide pellets and production of hot metal was increased by 75 percent. Economic appraisal of the cost of making hot metal indicates that reduced pellets could be more profitable than any other iron raw material in both investment capital and daily cost of operation. (Author)
Keywords
  • Iron ores
  • Pelleting
  • Smelting
  • Pellets
  • Iron
  • Reduction(Chemistry)
  • Reducing agents
  • Utilization
Source Agency
  • Bureau of Mines
NTIS Subject Category
  • 71J - Iron & Iron Alloys
Corporate Authors BUREAU OF Mines, Washington, D.C.
Supplemental Notes Paper copy available from SOD $0.65 as I28.3:651.
Document Type Technical Report
NTIS Issue Number 197110
Prereduced Iron Ore Pellets: Preparation, Properties, Utilization.
Prereduced Iron Ore Pellets: Preparation, Properties, Utilization.
PB198107

  • Iron ores
  • Pelleting
  • Smelting
  • Pellets
  • Iron
  • Reduction(Chemistry)
  • Reducing agents
  • Utilization
  • Bureau of Mines
  • 71J - Iron & Iron Alloys
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