Thesis
Use of nitrogen in flotation for iron sulphide rejection
Public Deposited- Creator
- Abstract
- The rejection of iron sulphides (pyrite and pyrrhotite) using nitrogen was evaluated on three Canadian complex sulphide ores. Laboratory scale work (at McGill and on-site) was conducted and, in addition, continuous minicell testwork was conducted on-site. The promotion of pyrite flotation using nitrogen was confirmed. It was evaluated at Brunswick Mining ahead of zinc flotation (using the minicells), and at Kidd Creek Mines in a laboratory scale investigation of reverse flotation. This latter also showed enhanced chalcopyrite flotation with nitrogen. The explanation of pyrite flotation using nitrogen was based on weakening of galvanic coupling with other sulphides. Nitrogen proved more effective than air in depression of pyrrhotite in processing a pentlandite/chalcopyrite ore. Under some conditions, chalcopyrite was also depressed by nitrogen (apparently when the pulp potential was less than O V vs. S.H.E.). The depressant action of nitrogen on pyrrhotite was interpreted as a reduction in the density of surface OH$ sp-$ sites necessary for electrostatic interaction with xanthate ion in the Hodgson/Agar model of pyrrhotite floatability.
English
- Last modified
- 2022-03-18
- Subject
- Publisher
- Language
- Identifier
- Rights
- All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated.
- Institution
- McGill University
- Department
- Degree
- Type
- Date
Relations
- In Collection:
Items
| Thumbnail | Title | Date Uploaded | Visibility | Actions |
|---|---|---|---|---|
|
|
MM72199.PDF | 2019-09-28 | Public | Download |