Effectiveness of organic binders for iron ore pelletization

Haas, L. A. (Larry A.); Aldinger, Jeffrey A.; Zahl, Robert K.

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CDC STACKS serves as an archival repository of CDC-published products including scientific findings, journal articles, guidelines, recommendations, or other public health information authored or co-authored by CDC or funded partners. As a repository, CDC STACKS retains documents in their original published format to ensure public access to scientific information.

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Effectiveness of organic binders for iron ore pelletization

1989
By Haas, L. A. (Larry A.) ; Aldinger, Jeffrey A. ; Zahl, Robert K.
Series: Mining Publications

English

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Details:

Personal Author:

Haas, L. A. (Larry A.) ; Aldinger, Jeffrey A. ; Zahl, Robert K.

Haas, L. A. (Larry A.) ; Aldinger, Jeffrey A. ; Zahl, Robert K. Less -
Corporate Authors:

United States. Bureau of Mines.
Description:

"The U.S. Bureau of Mines investigated the use of organic binders as substitutes for bentonite in agglomerating iron ore concentrate. Over 30 organic binders were evaluated at several dosage levels in laboratory tests. The binder groups producing the greatest green pellet strengths were natural gums (guars), carboxyl methyl celluloses, and gelled starches. The nongelled and alkalized starches, starch acrylic copolymers, wood-related products, and dairy products were less effective but better than bentonite. The highest wet pellet drop numbers were obtained with binders that had a medium plate water absorption value (>500 and <10,000) in distilled water and a high slurry viscosity (>75 cp) at 6 pct solids. The highest dry compressive strengths were obtained with binders that gave the highest adhesive tensile strength (>4 kg/cm2) on iron oxide lap-joint substrates. Pellets with 0.1 pct organic binder had lower compressive strengths and reduction disintegration indices than those with 1 pct bentonite, but higher reduction rates. Pellets with carboxyl methyl cellulose and gelled starch had higher softening temperatures than those with bentonite. Overall, the most promising binder is gelled starch. Its price makes it more cost effective than carboxyl methyl cellulose, and its pellets have metallurgical properties superior to those of bentonite pellets." - NIOSHTIC-2

NIOSH no. 10006967
Subjects:

[+]

Bentonite. Binders (Materials) Iron Ores. Pelletizing (Ore-dressing)
Series:

Mining Publications
Subseries:

Report of Investigations
Document Type:

Text
Genre:

Report
CIO:

National Institute for Occupational Safety and Health (NIOSH)
Pages in Document:

21 numbered pages
NIOSHTIC Number:

10006967
Resource Number:

RI 9230
Collection(s):

National Institute for Occupational Safety and Health
Main Document Checksum:

[+]

urn:sha-512:76c09a7b6acbfc3ec3b5052e30721583d7210a1d5b87de01eb23ff35a578e425068c79f9549acff32baa7db6bbcee6dc2f0be31a7518859396bdab8c66820f57
Download URL:

https://stacks.cdc.gov/view/cdc/10433/cdc_10433_DS1.pdf
File Type:

[PDF-1.40 MB]