Report of Investigations 8944: Flocculation of Metal Oxide and Hydroxide Minerals with Cross-Linked Starches Containing Chelating Groups

Details

• Journal Article:
  MISSING
• Personal Author:
  Termes, Silvia C. ; Wilfong, Roy L.
• Description:
  To help develop the basis for new fine-particle separation methods, the Bureau of Mines has investigated the use of cross-linked starches containing four chelating groups--carboxylate, iminodiacetate, diethanolamine, and xanthate--as flocculants for selected metal oxide and hydroxide mineral fines. It was found that those starches capable of interacting with the mineral surface by a chemisorption mechanism (as indicated by zeta potential measurements) produced the highest recoveries and grades of the metal oxide or hydroxide when flocculated from a binary mixture with quartz. The effects of ph, dispersing agent, stirring rate, stirring time, and starch dosage on selective flocculation were studied for binary mixtures of hematite and chromite with quartz. Floc strength becomes important in achieving maximum recoveries by mechanical postflocculation separations. [Description provided by NIOSH]
• Subjects:
  Metals Minerals Mining Occupational Health Safety
• Source:
  MISSING :17 pages
• Series:
  NIOSH Numbered Publications   ; Mining Publications  
• Subseries:
  Report of Investigations
• Document Type:
  Text
• Genre:
  Report
• Place as Subject:
  United States
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  AVRC - Avondale Research Center
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  22 pdf pages
• NIOSHTIC Number:
  nn:10004446
• Federal Fiscal Year:
  1985
• Peer Reviewed:
  False
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:a09a747ba898534d4e16415d92c36138ffcc05ebaa081e1b418d0654e47608d5e628da4d4d3e5d385cc144f4a25acb84145c3795e91e68b331fbd9b5c28cbb3e
• Download URL:
  https://stacks.cdc.gov/view/cdc/10502/cdc_10502_DS1.pdf
• File Type:
  [PDF - 8.70 MB ]