Pumped co-disposal of black coal washery wastes in Australia
Conference
·
OSTI ID:588739
- Univ. of Queensland, Brisbane (Australia)
The washing of black coal results in the production of coarse reject and tailings wastes, which historically have been disposed of separately. Loose-dumped coarse reject is highly porous, with largely air-filled voids. Tailings, disposed of as an aqueous slurry, have a high porosity with water-filled voids. By co-disposing coarse reject and tailings, the voids between the coarse reject particles can be filled with tailings. The mixture settles, drains, and gains strength and stiffness rapidly. It occupies less volume than the two waste products disposed of separately, potentially increasing the water return, and also facilitating rehabilitation. This paper briefly describes various co-disposal methods, detailing the behaviour, advantages, disadvantages, and cost implications of the co-disposal of coarse reject and tailings by combined pumping.
- OSTI ID:
- 588739
- Report Number(s):
- CONF-9605286--
- Country of Publication:
- United States
- Language:
- English
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