Advancing contact angle of iron ores as a function of their hematite and goethite content: Implications for pelletising and sintering

Iveson, SM, Holt, S and Biggs, S (2004) Advancing contact angle of iron ores as a function of their hematite and goethite content: Implications for pelletising and sintering. International Journal of Mineral Processing, 74 1-4: 281-287. doi:10.1016/j.minpro.2004.01.007


Author Iveson, SM
Holt, S
Biggs, S
Title Advancing contact angle of iron ores as a function of their hematite and goethite content: Implications for pelletising and sintering
Journal name International Journal of Mineral Processing   Check publisher's open access policy
ISSN 0301-7516
Publication date 2004-11-19
Year available 2004
Sub-type Article (original research)
DOI 10.1016/j.minpro.2004.01.007
Open Access Status Not yet assessed
Volume 74
Issue 1-4
Start page 281
End page 287
Total pages 7
Publisher ELSEVIER SCIENCE BV
Language eng
Subject 1900 Earth and Planetary Sciences
1906 Geochemistry and Petrology
1909 Geotechnical Engineering and Engineering Geology
Abstract The advancing water contact angles of 17 different iron ores have been measured. The primary constituents of the ores were hematite and goethite and compositions varied from 98% hematite through to 87% goethite. The measured ore contact angles ranged from 0° to 74°. An approximately linear correlation was found between the contact angle and the ore composition given by, θ=45x+8 (±10°), where θ is the contact angle (°) and x is the volume fraction of hematite in the ore. Hence, the hydrophobic character of the ore was observed to increase with increasing hematite and decreasing goethite content. These results are important for mineral processing operations such as pelletising and flotation. In both cases, water contact angles play a critical role. For pelletising of porous iron ore fines, the contact angle influences the amount of liquid absorbed into the pores and also the amount of interparticle liquid required to promote granulation.
Keyword Contact angle
Flotation
Goethite
Granulation
Hematite
Iron ore
Pelletisation
Wettability
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: ResearcherID Downloads - Archived
 
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