Research Article
Economic and Environmental Evaluation and Optimal Ratio of Natural and Recycled Aggregate Production
Table 3
The specifications of machinery in the production plant.
| | Scenario 1 | | Step | Symbol | Machine & model | (KW) | | UP (USD) | (USD/year) | (USD/year) |
| | 1 | A1 | Bulldozer. Komatsu D155A-2, efficiency = 71% | 238.6 | 2 | 140541 | 24000 | 23892 | | A2 | Hydraulic excavator. Komatsu PC 600-7, efficiency = 75% | 287 | 3 | 129730 | 36000 | 35805 | | A3 | Wheel loader. Komatsu WA420-3, efficiency = 75% | 162 | 2 | 67027 | 24000 | 12065 | | A4 | Lorry truck. Benz Wh 2624, efficiency = 82% | 179 | 6 | 56757 | 72000 | 28265 | | A5 | Backhoe loader. HEPCO B90B, efficiency = 65% | 72 | 1 | 29189 | 12000 | 2277 |
| | 2 | A6 | Primary-jaw crusher | 165 | 1 | 31216 | 37920 | 4865 | | A7 | Secondary-hydrocone crusher | 125 | 2 | 26486 | 13946 | | A8 | Tertiary-impact crusher | 195 | 1 | 26351 | 7622 | | A9 | Vibrating feeder | 16 | 2 | 10811 | 2789 | | A10 | Vibrating screening | 19 | 3 | 15405 | 4962 | | A11 | Bucket-typed sand washing machine | 18 | 1 | 12162 | 1459 | | A12 | Pan-typed aggregate washing machine | 20 | 3 | 7568 | 2919 | | A13 | Control panel | — | 1 | 19595 | 85 | | A14 | Steel structure, 7.85 tons | — | 1 | 8486 | 950 | | A15 | Conveyor belt 1.2 × 35 | 18 | 4 | 12297 | 7568 | | A16 | Conveyor belt 1.2 × 21 | 12.5 | 4 | 7095 | 4541 | | A17 | Conveyor belt 1 × 15 | 8 | 3 | 4622 | 2311 | | A18 | Conveyor belt 1 × 8 | 6.5 | 2 | 2270 | 800 | | A19 | Conveyor belt 1.2 × 4 | 5 | 1 | 1081 | 200 | | A20 | Conveyor belt 1 × 3.5 | 4 | 2 | 1041 | 341 |
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t/h, , , , , = 20 years, and USD/kg.
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