Reagent and processing | Cost | Usage | Subtotal cost (USD t− 1) | |
---|---|---|---|---|
Recycling of used alkaline solution for KFeS2 synthesis | Fe-bearing sludge | 0 | 0.86 t | 0 |
Supplementary Potassium sulphide | 673.3 USD t−1 | 1.38 t | 929.15 | |
Supplementary Potassium hydroxide | 432.5 USD t−1 | 0.34 t | 147.05 | |
Tap water | 0.28 t−1 | 3.1 t | 0.86 | |
Pulping | 0.21 USD/kWh | 0.5 kW (total 1 h) | 0.11 | |
Hydrothermal reaction | 0.21 USD/kWh | 30 kW (total 24 h) | 151.2 | |
Drying | 0.21 USD/kWh | 6 kW (total 20 h) | 25.2 | |
Total cost | 1253.57 |