Assessment of coal-cleaning technology: final report. Report for January 1977-January 1981

Technical Report · Wed Oct 01 04:00:00 EDT 1986

OSTI ID:6891049

McCandless, L C; Onursal, A B; Moore, J M

The report gives results of tests at seven coal-preparation plants to evaluate the performance of froth flotation cells and dense-medium cyclones in removing ash and sulfur (S) from fine coal (Minus 28 mesh). Flotation circuits tested at four plants showed substantial reductions in coal ash content (64-88%), pyritic S content (48-65%), and sulfur dioxide (SO/sub 2/) emission (expressed as ng SO/sub 2//million Btu; 15-87%) at mean weight recoveries of 11-54%. Raw and clean coal data sets were found to exhibit statistical properties that can be characterized by time series models. The use of low-S coal, PCC, or chemical coal cleaning (CCC) was evaluated for compliance with potential SO/sub 2/ emission limits for industrial boilers. PCC can achieve moderate S reductions in (high S) Northern Appalachian and Midwestern coals, but few of these coals can be cleaned to meet a 516 ng SO/sub 2//million Btu standard. Many Southern Appalachian, Alabama, or Western coals are capable of meeting the standard as mined or after cleaning.

• Research Organization: Versar, Inc., Springfield, VA (USA)
• OSTI ID: 6891049
• Report Number(s): PB-87-120515/XAB
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
AIR POLLUTION ABATEMENT
BOILERS
CHALCOGENIDES
CHEMICAL REACTIONS
CLEANING
COAL PREPARATION
COMPLIANCE
CONCENTRATORS
CYCLONE SEPARATORS
DESULFURIZATION
EQUIPMENT
FLOTATION
INERTIAL SEPARATORS
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTION ABATEMENT
POLLUTION CONTROL EQUIPMENT
REMOVAL
SEPARATION EQUIPMENT
SEPARATION PROCESSES
STANDARDS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
TECHNOLOGY ASSESSMENT