Dewatering of Oil Sands Mature Fine Tailings by Dual Polymer Flocculation and Pressure Plate Filtration
| Autor: | Rosalynn Loerke, Qi Liu, Xiaoli Tan |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Flocculation
Chromatography General Chemical Engineering Polyacrylamide Energy Engineering and Power Technology 02 engineering and technology 021001 nanoscience & nanotechnology Dewatering Tailings law.invention Filter cake chemistry.chemical_compound Fuel Technology 020401 chemical engineering chemistry Chemical engineering law PolyDADMAC Oil sands 0204 chemical engineering 0210 nano-technology Filtration |
| Zdroj: | Energy & Fuels. 31:6986-6995 |
| ISSN: | 1520-5029 0887-0624 |
| Popis: | The mature fine tailings (MFT) generated from oil sands operations in northern Alberta, Canada, is the most challenging mine tailings to dewater. The MFT forms a gel structure and takes decades to settle and release water. Dewatering of a MFT sample was investigated in this study with a two-stage polymer treatment protocol followed by pressure plate filtration. MFT treated with polymer pairs consisting of anionic polyacrylamide (A3335) and cationic polyDADMAC (Alcomer 7115) or A3335 and nonionic poly(ethylene oxide) yielded better filtration results than single polymer treatment. Dual polymer treatment led to shorter capillary suction time, higher filter cake solids content, higher net water release, faster water release rate, and lower specific resistance to filtration. The effect of residual bitumen in the MFT on filtration was investigated by comparing the flocculation and pressure filtration of pure kaolinite slurry with and without mixing in 3.0 wt % bitumen centrifuged from MFT. It was found that th... |
| Databáze: | OpenAIRE |
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