Investigation of methods for producing reactor-grade zirconium oxide from a zirconium-bearing chloride-sulfate strip liquor solution

Details

• Personal Author:
  Defilippi, Carl E. ; Henry, Helen G. ; MacDonald, David J.
• Corporate Authors:
  United States. Bureau of Mines
• Description:
  "The Bureau of Mines investigated two alternative methods for treating a zirconium-bearing chloride-sulfate strip liquor to obtain reactor-grade zro2. One method involves neutralization with nh3 and the other hydrothermal precipitation. The strip liquor was derived from zircon sand by a Bureau of Mines method for separating zirconium and hafnium via solvent extraction with a Tertiary amine. Neutralization with nh3 to precipitate hydrous zirconium oxide required 0.9 to 1.1 G nh3 per gram of zirconium. The nh3 can be recovered for recycle. Zro2 that met reactor-grade specifications was produced by precipitation with nh3. Hydrothermal precipitation of zro2 from strip liquor required that the solution be maintained at 260 deg c and 680 psi for 10 min and in a noncorrodible pressure vessel. In bench-scale experiments both methods gave zirconium recoveries greater than 99 pct." - NIOSTHTIC-2
  
  NIOSHTIC no. 10003307
  
  
• Subjects:
  Occupational Health Safety
• Series:
  Mining Publications
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  9 numbered pages
• NIOSHTIC Number:
  nn:10003307
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:eeaed984184a3793afc08cfa5ecad1a11e0c8a8ddee102a96b31bdad507b15b5e24178062b0a08878bcc77883536accf859919ceccadd56ca42e8899f7bcdd17
• Download URL:
  https://stacks.cdc.gov/view/cdc/10552/cdc_10552_DS1.pdf
• File Type:
  [PDF - 579.60 KB ]