Recovering fine-size coal from Alabama surface mine washer wastes using the Humphreys spiral

Book · Sat Jan 01 04:00:00 EST 1977

OSTI ID:6305267

Browning, J S

The Mineral Resources Institute and State Mine Experiment Station of The University of Alabama conducted Humphreys spiral tests of fine coal waste from nine preparation plants of Alabama strip mining operations, to determine the feasibility of recovering low ash, low sulfur fuel meeting steam coal specifications. The ash in the samples ranged from 9 to 51 percent, and the total sulfur ranged from 0.45 to 2.39 percent. Continuous laboratory tests using a Humphreys spiral gave good recovery of the coal with excellent rejection of the ash and pyritic sulfur. Coal recoveries of 83.6 to 94.1 percent were achieved from the different samples. Ash content of the clean coal products fell within a range of 5 to 12.2 percent, with a total sulfur content of 0.62 and 1.10 percent. In quality, the products were comparable or superior to those now being shipped from the preparation plants.

• OSTI ID: 6305267
• Report Number(s): NP-23726
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
ASHES
COAL FINES
COAL MINING
COAL PREPARATION
COMMINUTION
ELEMENTS
FEASIBILITY STUDIES
MANAGEMENT
MINERAL WASTES
MINING
NONMETALS
PROCESSING
RECOVERY
REMOVAL
RESIDUES
SOLID WASTES
SULFUR
SURFACE MINING
WASTE MANAGEMENT
WASTE PROCESSING
WASTES