Research Article
Design and Application of Rapid Dewatering for Tailings Containing Sodium Silicate: Laboratory and Industrial Test Results
Table 3
Comparison of different dewatering schemes.
| No | Items | L&A | S&A | C&A |
| 1 | Dosage of reagents | | | | 1.1 | Lime (kg/t) | 2 | | | 1.2 | H2SO4 (kg/t) | | 2.6 | | 1.3 | CaCl2 (kg/t) | | | 3 | 1.4 | APAM (g/t) | 30 | | 30 g/t | 1.5 | NAPAM (g/t) | | 20 | | 2 | Reagent cost (US $/t) | 0.27 | 0.31 | 0.39 | 2 | BHC (t/(m2·h)) | 0.54 | 0.49 | 0.59 | 3 | SCOW (ppm) in 24 hours | >300, after 10 hours | <300 | <300 | 4 | pH after 24 hours of operation | 14 | 4 | 8 | 5 | Underflow concentration | <70 wt.% after 12 hours | >70 wt.% | >70 wt.% | 6 | Additional devices | | | | 6.1 | Defoaming device | 2 (one for spare) | | | 6.2 | Neutralization system for pH | 2 (one for spare) | 2 (one for spare) | | 6.3 | Anticorrosion treatment | | 1 | |
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