Flotation of a porphyry copper ore with cellulose-surfactant mixtures as frother agents
Research output: Contribution to conference › Paper › Scientific › peer-review
Bubble size and foam property measurements were run in a two-phase system along with laboratory-scale flotation experiments conducted using a porphyry copper ore from a mine in Finland. A comparative analysis on recovery, grade and flotation kinetics is presented on the products obtained using: i) a partially hydroxylated cellulose derivative (i.e. hydroxypropyl methyl cellulose; HPMC), ii) a commercial polyglycol-ester frother (Nasfroth240; NF240), and
iii) mixtures of these two.
The results show that using frothers with a total concentration of 30 ppm, the HPMC-NF240 mixtures provide advantages in terms of Cu recovery, (i.e., up to 95%), compared to the use of either NF240 (ca. 76%) or HPMC alone (ca. 1%). Interestingly, only a small proportion of HPMC mixed with NF240 was sufficient to produce a measurable increase in recovery. This improved performance was attributed to a synergistic effect of the polymer-surfactant mixture
which further reduced the bubble sizes in a two-phase system compared to that of NF240. The present work offers a further step into understanding the phenomena taking place when a short chained surfactant is either substituted or mixed with a cellulose derivative, offering potential ways of exploiting this behavior for the enrichment of minerals.
|Number of pages||13|
|Publication status||Published - 18 Aug 2019|
|MoE publication type||Not Eligible|
|Event||Copper - Vancouver, Canada|
Duration: 18 Aug 2019 → 21 Aug 2019
|Period||18/08/2019 → 21/08/2019|
- Chalcopyrite, Copper, Flotation, Frothers, Green Chemistry, Hydroxypropyl methyl cellulose, Mineral processing, Polymer-surfactant mixtures