Recovery of Valuable Materials with the RecoDust Process
Abstract
:1. Introduction
2. Materials and Methods
2.1. Feed Material and Characterization
2.2. RecoDust Pilot Plant and Methodology
2.3. Evaluation of the Products of the RecoDust Process: The RDS and the CZO
3. Results
3.1. Feed Material Characterization
Species | Dust Feed [wt.%] |
---|---|
CaO | 8.45 |
Fetot | 50.05 |
Femet | 20.78 |
FeRed | 31.06 |
Zn | 14.60 |
B2 | 6.40 |
B4 | 7.01 |
SiO2 | 1.32 |
Al2O3 | 0.11 |
MgO | 1.57 |
Cl | 0.06 |
F | 0.01 |
3.2. Chemical Analysis of the RecoDust Slag and the Crude Zinc Oxide
3.2.1. Chemical Analysis of the RDS
3.2.2. Chemical Analysis of the Crude Zinc Oxide
3.2.3. RDI Tests with the RDS
3.2.4. Soda Leaching
4. Discussion and Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Process | Products | Disadvantages | Advantages |
---|---|---|---|
Waelz | Zinc-rich dust (Waelz oxide) |
| Well-established technology and reliable process Fewer operation steps and simple process |
RHF | Zinc-rich dust; direct reduced iron |
| Well-established technology and reliable process Fewer operation steps and simple process High metallization rate of residue |
OxyCup | Zinc-rich dust; molten iron. Slag | Short operating cycle of the equipment High costs for smelting | Many types of dust that can be recycled High metal recovery rate High added value of the product |
DK | Hot metal, zinc-rich dust | High energy consumption Serious environmental pollution Poor long-term operation safety | Well-established technology and reliable process Serious low equipment investment The produced pig iron can be used in the casting process |
Trial | Air Excess Ratio | Flash-Reactor Temperature [°C] |
---|---|---|
K12-1 | 0.7 | 1700 |
K12-2 | 0.7 | 1700 |
K12-3 | 0.7 | 1700 |
K12-4 | 0.7 | 1700 |
K12-5 | 0.8 | 1700 |
K12-6 | 0.8 | 1700 |
Sample 1 | Sample 2 | Sample 3 | Sample 4 | Sample 5 | Sample 6 | |
---|---|---|---|---|---|---|
Designation | MRDS1 | MRDS2 | BMA1 | BMA2 | BMB1 | BMB2 |
Percentage RDS [wt.%] | 3.29 | 3.29 | 0 | 0 | 0 | 0 |
Element | Feed | VK 1/1 | VK 1/2 | VK 2/1 | VK 2/2 |
---|---|---|---|---|---|
Zn [wt.%] | 59.5 | 59.9 | 58.9 | 61.7 | 61.5 |
Fe [wt.%] | 12.90 | 13.7 | 13.3 | 12.2 | 12.2 |
Cl [mg/kg] | 3790 | 282 | 212 | 283 | 211 |
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Reiter, W.; Rieger, J.; Raupenstrauch, H.; Cattini, L.; Maystrenko, N.; Kovalev, D.; Alexey, A.; Mitrofanov, A. Recovery of Valuable Materials with the RecoDust Process. Metals 2023, 13, 1191. https://doi.org/10.3390/met13071191
Reiter W, Rieger J, Raupenstrauch H, Cattini L, Maystrenko N, Kovalev D, Alexey A, Mitrofanov A. Recovery of Valuable Materials with the RecoDust Process. Metals. 2023; 13(7):1191. https://doi.org/10.3390/met13071191
Chicago/Turabian StyleReiter, Wolfgang, Johannes Rieger, Harald Raupenstrauch, Luigi Cattini, Nikolay Maystrenko, Denis Kovalev, Alekseyev Alexey, and Artem Mitrofanov. 2023. "Recovery of Valuable Materials with the RecoDust Process" Metals 13, no. 7: 1191. https://doi.org/10.3390/met13071191