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Fine coal-refuse slurry dewatering.
Backer RR; Busch RA
MISSING, 1981; :1-18
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.
Mining industry; Coal mining; Refuse collection; Waste treatment; Waste disposal; Solid waste; Solid waste disposal; Environmental engineering; Lime; Polymers
IH; Report of Investigation
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division