The chemical enhancement of the triboelectric separation of coal from pyrite and ash: A novel approach for electrostatic separation of mineral matter from coal
Arthur D. Little, Inc., under contract to the US DOE Pittsburgh Energy Technology Center, has developed a triboelectric separation device for coal beneficiation, that employs an entrained-flow, rotating-cylinder concept. The described apparatus has been used to test the efficacy of chemical pretreatment and in-situ treatment of coal on separation efficiency. Coal particle entrainment is achieved with gaseous carbon dioxide and particle collection is accomplished by an electrostatic plate separator. The triboelectric separation device incorporates instrumentation for the direct measurement of charge in the dilute-phase particle stream. Some of the pretreatment materials investigated under this project to modify the surface charging characteristics of the coal included oleic acid, sodium oleate, quinoline and dicyclohexylamine. Ammonia and sulfur dioxide at a concentration up to 1000 ppM was used for in-situ treatment of the coal, with carbon dioxide as the carrier/inerting gas. Nitrogen was used earlier in the test program as the carrier/inerting gas for the coal, but a severe arcing problem was encountered in the electrostatic collector with nitrogen as the carrier gas. This problem did not occur when carbon dioxide was used. The report covers the chemical treatment employed, and summarizes and interprets the results achieved. In addition, an economic analysis of a full scale system based on this concept is presented.
- Research Organization:
- Little (Arthur D.), Inc., Cambridge, MA (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC22-87PC79888
- OSTI ID:
- 6828787
- Report Number(s):
- DOE/PC/79888-T29; ON: DE93007437
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
DEASHING
DESULFURIZATION
SURFACE PROPERTIES
AMINES
AMMONIA
CARBON DIOXIDE
CLEANING
COAL PREPARATION
ECONOMIC ANALYSIS
ELECTROSTATICS
EXPERIMENTAL DATA
NITROGEN
OLEIC ACID
PROGRESS REPORT
PYRITE
QUINOLINES
SEPARATION PROCESSES
SULFUR DIOXIDE
AROMATICS
AZAARENES
AZINES
CARBON COMPOUNDS
CARBON OXIDES
CARBONACEOUS MATERIALS
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
DOCUMENT TYPES
ECONOMICS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROGEN COMPOUNDS
INFORMATION
MATERIALS
MINERALS
MONOCARBOXYLIC ACIDS
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYRIDINES
SULFIDE MINERALS
SULFUR COMPOUNDS
SULFUR OXIDES
010300* - Coal
Lignite
& Peat- Preparation- (1987-)
010402 - Coal
Lignite
& Peat- Purification & Upgrading