Smelting of Nickel Oxide Ores to Produce Ferronickel

Details

• Personal Author:
  Hunter, Willard L. ; Paulson, Danton L. ; Stickney, William A.
• Description:
  Those ores of either the laterite or serpentine type and containing generally 1-2 pct ni with much more fe, are smelted in an arc furnace to a ferroalloy containing >40 pct ni by a new 2-step process using cheap coke reducing agent and lean ore, which is not concentrated, but merely pre-dried at 1,200 deg.-1,500 Deg. F in a rotary kiln. In the 1st smelting stage the hot ore coming from the drier is mixed with 35-40 pct of the coke required to reduce oxides of ni and fe, and the smelting is carried out at a temperature sufficiently high to convert the ore gangue to a fluid slag depleted in ni but not fe. The slag is removed, leaving a low-grade ni alloy in the furnace. Another charge is then added, of hot calcined ore with 20-25 pct of the coke required for reduction of its oxides of ni and fe, and this is smelted to add ni to the low-grade alloy in the product, and the 1st step is repeated with its greater proportion of reducing agent to reduce ni from the high-nio slag left in the furnace. [Description provided by NIOSH]
• Subjects:
  Ferrous Compounds Metals Nickel Occupational Health Safety
• Series:
  Mining Publications
• Document Type:
  Text
• Genre:
  Other
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  ALRC - Albany Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  4 pdf pages
• NIOSHTIC Number:
  nn:10012024
• Citation:
  U S Pat 3 854 936 1974 Dec; :
• Federal Fiscal Year:
  1975
• Peer Reviewed:
  False
• Source Full Name:
  U.S. Pat. 3,854,936; Dec. 17, 1974; Chem. Abstr. 82:88,717R
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e7bec0212d136046267c9f0fb890b89e4cd482e70462ecac9492c168c6e3c73d739b90c624afb640d75ac8dcc7e315a2f29c725794a5e1fdc28057f47f794e16
• Download URL:
  https://stacks.cdc.gov/view/cdc/236550/cdc_236550_DS1.pdf
• File Type:
  [PDF - 255.54 KB ]