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Fine coal-refuse slurry dewatering.

Authors
Backer-RR; Busch-RA
Source
MISSING, 1981; :1-18
Link
NIOSHTIC No.
10006748
Abstract
The Bureau of Mines, in cooperation with Washington Irrigation and Development Company (Widco), evaluated the dewatering of fine coal- refuse slurry using chemicals and various types and combinations of drains in natural earth impoundments. About 40 lb of lime and 2 lb of polymer per ton of dry solids were mixed with the underflow from the preparation-plant thickener. Clear, free water was immediately liberated from the slurry. The percent solids by weight of the slurry increased from about 17 to 30 immediately, and after 5 days increased to 45 wt-pct. This indicates a threefold reduction in total volume after 5 days from 172 cu ft/ton solids originally to 56 cu ft/ton solids.
Keywords
Mining-industry; Coal-mining
Publication Date
19810101
Document Type
IH; Report of Investigation
Fiscal Year
1981
NTIS Accession No.
NTIS Price
Identifying No.
RI 8581
NIOSH Division
SRC
Source Name
MISSING
State
WA
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