A Review of Recent Advances in Depression Techniques for Flotation Separation of Cu–Mo Sulfides in Porphyry Copper Deposits
Abstract
:1. Introduction
2. Typical Process of Cu–Mo Sulfide Ores
3. Alternative Options for Selective Flotation of Cu–Mo Bulk Concentrates
3.1. Molybdenite Depression
3.1.1. Dextrin
3.1.2. Lignosulfonates
3.1.3. Carboxymethyl-Based Organic Compounds and Humic Acid
3.2. Depression of Cu Minerals
3.2.1. Inorganic Depressants
3.2.2. Organic Depressants
3.3. Oxidation Treatments for Depressing Cu Minerals
3.3.1. Ozone Oxidation
3.3.2. Plasma Oxidation
3.3.3. H2O2 Oxidation
3.3.4. Electrolysis Oxidation
3.4. Microencapsulation Techniques for Depressing Cu Minerals
4. Summary
Author Contributions
Funding
Conflicts of Interest
References
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Mo Depressant | Feed | Results | Features |
---|---|---|---|
Dextrin [22,23,24,25,26] | Natural MoS2 [24], Cu ore (0.7–3.03% Cu, 0.011–0.14% Mo) [26]. | ||
Lignosulfonate [27,28,29,30,31] | Natural CuFeS2 and MoS2 [28]. |
|
|
O-carboxymethyl chitosan (O-CMC) [32,33] | Natural CuFeS2 and MoS2 [32]. |
|
|
Humic acid (HA) [34] | Natural CuFeS2 and MoS2 [34]. |
|
|
Carboxymethylcellulose (CMC) [35,36,37] | Natural MoS2 [35]. |
|
|
Electrolyte | HSHB | LSLB | ||
---|---|---|---|---|
Thickness (nm) | Γ (%) | Thickness (nm) | Γ (%) | |
10−2 M KCl | 1.1 ± 0.2 | 23 | 2.6 ± 0.2 | 100 |
2.76 × 10−2 M KCl | 1.6 ± 0.6 | 95 | 4.0 ± 0.4 | 100 |
SPW * | 2.7 ± 0.5 | 100 | 6.3 ± 0.4 | 100 |
Cu Depressant | Feed | Results | Features |
---|---|---|---|
Na2SO3 [39,40,41,42,43,44,45] | Natural CuFeS2 and MoS2 [44]. |
|
|
Seawater [46,47,48,49,50,51,52,53,54,55,56,57,58] | Natural CuFeS2 and MoS2 [49]. |
|
|
Organic depressants (e.g., PGA [59], DMSA [60], DBT [61], chitosan [62,63,64,65], ATDT [66], and AHS [67]) | Bulk Cu–Mo conc. [59], Cu–Mo ore [60], Cu–Mo rough conc. [61], natural CuFeS2 and MoS2 [62], CuFeS2 and MoS2 purified by flotation [66,67]. |
|
|
Oxidation treatments (e.g., ozone (O3) [68,69,70,71,72,73], plasma [74], H2O2 [13,75,76,77], and electrolysis [78]). | Bulk Cu–Mo conc. [69], natural CuFeS2 and MoS2 [13,74,75], mineral electrodes [78]. |
|
|
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Park, I.; Hong, S.; Jeon, S.; Ito, M.; Hiroyoshi, N. A Review of Recent Advances in Depression Techniques for Flotation Separation of Cu–Mo Sulfides in Porphyry Copper Deposits. Metals 2020, 10, 1269. https://doi.org/10.3390/met10091269
Park I, Hong S, Jeon S, Ito M, Hiroyoshi N. A Review of Recent Advances in Depression Techniques for Flotation Separation of Cu–Mo Sulfides in Porphyry Copper Deposits. Metals. 2020; 10(9):1269. https://doi.org/10.3390/met10091269
Chicago/Turabian StylePark, Ilhwan, Seunggwan Hong, Sanghee Jeon, Mayumi Ito, and Naoki Hiroyoshi. 2020. "A Review of Recent Advances in Depression Techniques for Flotation Separation of Cu–Mo Sulfides in Porphyry Copper Deposits" Metals 10, no. 9: 1269. https://doi.org/10.3390/met10091269