Research Article
Statistical Evaluation and Optimization of Factors Affecting the Leaching Performance of Copper Flotation Waste
Table 4
Analysis of variance for concentration of leached copper.
| | Source | DF | Seq SS | Adj SS | Adj MS | | |
| | Main effects | 3 | 15385.8 | 15385.8 | 5128.6 | 33.71 | 0.000 | | pH | 1 | 12254.5 | 12254.5 | 12254.5 | 80.54 | 0.000 | | Stirring time | 1 | 2237.3 | 2237.3 | 2237.3 | 14.70 | 0.003 | | Temperature | 1 | 894.0 | 894.0 | 894.0 | 5.88 | 0.036 |
| | Way interactions | 3 | 7462.4 | 7462.4 | 2487.5 | 16.35 | 0.000 | | pH*stirring time | 1 | 426.4 | 426.4 | 426.4 | 2.80 | 0.125 | | pH*temperature | 1 | 1685.1 | 1685.1 | 1685.1 | 11.07 | 0.008 | | Stirring time*temperature | 1 | 5350.9 | 5350.9 | 5350.9 | 35.17 | 0.000 |
| | Way interactions | 1 | 590.5 | 590.5 | 590.5 | 3.88 | 0.077 | | pH*stirring time*temperature | 1 | 590.5 | 590.5 | 590.5 | 3.88 | 0.077 | | Curvature | 1 | 2861.3 | 2861.3 | 2861.3 | 18.81 | 0.001 |
| | Residual error | 10 | 1521.6 | 1521.6 | 152.2 | | | | Pure error | 10 | 1521.6 | 1521.6 | 152.2 | | |
| | Total | 18 | 27821.6 | | | | |
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