ORTHGIESS, E and DOBIAS, B (1994) COMPLEXING AGENTS AS MODIFIERS IN MINERAL FLOTATION - MECHANISM STUDIES. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 83 (2). pp. 129-141. ISSN 0927-7757, 1873-4359
Full text not available from this repository.Abstract
Several complexing agents containing both oxygen and nitrogen as donor atoms were tested with respect to their influence on the floatability of the salt-type minerals calcite, barite and fluorite. Apart from solving practical flotation problems, emphasis was placed above all on mechanistic aspects. For this purpose, flotation tests with anionic and cationic surfactants as collectors were performed, extensive adsorption experiments were carried out and the dissolution and electrokinetic behaviour of the minerals were studied. It was found that some of the complexing agents tested act as selective depressants in the flotation with anionic collectors. During flotation with cationic collectors one can often observe activating effects. In spite of their normally strong influence on floatability, no significant adsorption of chelating agents could be demonstrated. A single mechanism which explains all effects of the complexing agents does not exist. It turned out that there are several modes of action depending on which components represent the flotation system.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ADSORPTION; ADSORPTION; CHELATING AGENTS; COLLECTORS; COMPLEXING AGENTS; DISSOLUTION; FLOTATION; IONIC SURFACTANTS; MODIFIERS; SALT-TYPE MINERALS; ZETA-POTENTIAL |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:40 |
| URI: | https://pred.uni-regensburg.de/id/eprint/53407 |
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