Abstract
The dissolution of minerals provides elevated concentrations of alkaline earth metal ions such as calcium (Ca2+) in water which may have a significant influence on flotation performance. The effects of Ca2+ ions dissolved from calcite surfaces on the flotation performance of a monazite-calcite system have been investigated using micro-flotation tests followed by fundamental collector adsorption studies. The results indicate that specially adsorbed CaOH+ via hydrogen bonding competed with hydroxamic acid for the phosphate-oxygen active sites on the monazite surface and decreased its hydrophobicity due to hydration. Electrostatically adsorbed CaOH+ on monazite increased the adsorption density of hydroxamic acid through a chelating interaction. At higher dosages of calcium and hydroxamic acid, bulk and surface precipitation of calcium-hydroxamate occurs in the monazite-calcium-hydroxamic acid system.
| Original language | English |
|---|---|
| Pages (from-to) | 40-48 |
| Number of pages | 9 |
| Journal | Minerals Engineering |
| Volume | 100 |
| DOIs | |
| State | Published - Jan 1 2017 |
Bibliographical note
Publisher Copyright:© 2016 Elsevier Ltd
Funding
The research results presented in this publication was funded in part by the Kentucky Energy and Environment Cabinet (Project ID No. PON2 127 150002394 1).
| Funders | Funder number |
|---|---|
| Kentucky Energy and Environment Cabinet Department for Energy | PON2 127 150002394 1 |
Keywords
- Calcite
- Calcium ions
- Flotation
- Hydroxamic acid
- Monazite
ASJC Scopus subject areas
- Control and Systems Engineering
- General Chemistry
- Geotechnical Engineering and Engineering Geology
- Mechanical Engineering
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