Enhanced techniques for dewatering thick fine tailings
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United States of America Patent
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Jan 26, 2021
Grant Date -
Jun 25, 2015
app pub date -
Jun 21, 2013
filing date -
Jun 21, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
Techniques for dewatering thick fine tailings may include one or more pre-treatment steps, such as pre-shearing to reduce the yield stress prior to flocculation, hydrocarbon removal below a threshold to improve flocculation and dewatering, flocculant dosing on a clay basis, and providing certain properties of the thick fine tailings related to coarse and fine particle sizes and/or chemistry such as divalent cation content. Various advantages may result from pre-treatments based on thick fine tailings properties, such as reduced flocculant dosage requirements, improved dispersion of flocculant into the thick fine tailings and/or enhanced dewatering, for example. One or more of the pre-treatments may be performed.
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International Classification(s)
- B03D:FLOTATION; DIFFERENTIAL SEDIMENTATION
- B09C:RECLAMATION OF CONTAMINATED SOIL
- F26B:DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQU....
- C10G:CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HY....
- E21B:EARTH OR ROCK DRILLING
- C02F:TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE....
- B01D:SEPARATION
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