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Dewatering of Coal-clay Waste Slurries from Preparation Plants.

Authors
Brown-PM; Scheiner-BJ
Source
MISSING :8 pages
Link
NIOSHTIC No.
10003178
Abstract
The Bureau of Mines is investigating a dewatering technique for coal- clay waste that uses a flocculant, polyethylene oxide (peo). This flocculant forms strong stable flocs that can be dewatered on a static screen. A field test unit (ftu) using this technique was operated at approximately 400 gal/min, using a waste stream from the flotation circuit of a coal preparation plant. Consolidated coal- clay material containing 55 to 60 pct solids was produced when the flotation circuit slurries of 2.7 to 8 pct solids were treated with 0.1 to 0.3 Lb peo per ton of solids. The ftu was also operated at 64.5 and 87.5 Gal/min using a portion of the underflow slurry from the preparation plant's thickener. Consolidated coal-clay material containing 55 to 60 pct solids was produced when the thickener underflow slurries of 19 to 24 pct solids were treated with 0.08 To 0.2 Lb peo per ton of solids. Peo-treated materials continued to dewater when placed in a pit.
Publication Date
19830101
Document Type
IH; Report of Investigations
Fiscal Year
1983
NTIS Accession No.
NTIS Price
Identifying No.
RI 8824
NIOSH Division
TURC;
Source Name
MISSING
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