DY984N Copper leaching solvent is a modified aldoxime-ketoxime reagent. Its primary function is to selectively extract copper ions (Cu²⁺) from a pregnant leach solution (PLS) and then release (strip) that copper into a highly concentrated sulfuric acid solution to generate a rich electrolyte suitable for electro-winning.
|
Item |
DY984N |
| Appearance | Amber oil liquid |
| Density (25°C) | 0.907 |
| Flash point | ≥88°C (PMCC) |
| Copper saturation capacity 10% (V/V) | 5.12 g/L Cu |
| Extraction kinetics | ≥92% (30s) |
| Extraction isothermal point | ≥4.4 g/L Cu |
| Phase Stripping time of extraction | ≤57s |
| Stripping kinetics | ≥95% (30s) |
| Stripping isothermal point (Organic) | ≤1.8 g/L Cu |
| Stripping Phase time | ≤43s |
| Copper Net Transfer | 3.4 g/L Cu |
| Cu/Fe selectivity | ≥2279 |
| Liquid phase purity | 98.13 |
DY984N Copper leaching solvent in Copper Leaching Processes
DY984N is a specialized solvent commonly used in copper leaching processes within the field of hydrometallurgy. Copper leaching is a method for extracting copper from ores by utilizing an aqueous solution, typically acidic, to dissolve copper minerals. DY984N plays a crucial role in this process by selectively extracting copper from the ore while minimizing the dissolution of unwanted materials.
The solvent works by forming complexes with copper ions, enabling their separation from the ore. Once dissolved, the copper can be recovered using methods such as solvent extraction and electrowinning.
Primary Extractants of DY984N Copper leaching solvent
• Aldoximes (2-hydroxy-5-nonylsalicylaldehyde oxime): Aldoximes are strong extractants capable of efficiently extracting copper even from solutions with lower acidity. They are responsible for the high copper loading capacity of DY984N.
• Ketoximes (2-Hydroxy-5-nonyl ketoxime): Ketoximes are weaker but faster extractants. They offer excellent kinetics and facilitate rapid phase separation during the extraction process.
Diluent
The active extractants in DY984N are dissolved in a kerosene-based diluent, which serves as the bulk of the solvent’s volume. The diluent is inert and acts as the organic phase in the liquid-liquid extraction process.
Key Properties and Advantages of DY984N Copper leaching solvent
• High Selectivity: DY984N is highly selective, efficiently extracting copper while minimizing the co-extraction of impurity ions like iron, manganese, and aluminum. This is essential for producing high-purity cathode copper.
• Fast Kinetics: The solvent enables quick copper loading and stripping, which results in smaller mixer-settler units and higher flow rates, increasing operational efficiency.
• Good Physical Properties: DY984N promotes rapid, clean phase separation between the organic and aqueous phases. This minimizes the formation of crud (undesirable solids) and reduces solvent losses.
• High Loading Capacity: The solvent has the capacity to carry a significant amount of copper per cycle, making the process more efficient and reducing the number of extraction stages needed.
• Robust Performance: DY984N maintains consistent performance across a wide range of operating conditions and Pregnant Leach Solution (PLS) compositions.
Typical Application of DY984N Copper leaching solvent in a Copper SX Circuit
1. Extraction: The diluted DY984N solvent, typically in kerosene, is mixed with the copper-rich PLS (aqueous phase) in a mixer-settler. The extractants selectively bind to copper ions, transferring them into the organic phase.
2. Separation: The mixture is allowed to settle, forming two immiscible phases: the copper-loaded organic phase and the copper-depleted aqueous raffinate. Gravity separation occurs in the settler.
3. Stripping: The copper-loaded organic phase is then mixed with a strong sulfuric acid solution (typically spent electrolyte from the electrowinning tankhouse). The high acidity causes the extractants to release the copper ions into the aqueous phase, creating a rich electrolyte that is high in copper content.
4. Electrowinning: The rich electrolyte is sent to the electrowinning tankhouse, where an electrical current is applied, plating out pure (99.99%+) copper onto cathodes.
5. Recycle: The barren organic solvent, now stripped of copper, is recycled back to the extraction stage to begin the process anew.
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