Automated microscopy methods for measuring pyritic sulfur content of coal and determining degree of liberation of pyrite in coal: Final report
The objective of this project is to develop an automated procedure, to be implemented in an IBAS image analyzer, to determine size, shape and degree of liberation of pyrite particles in a coal matrix. This procedure is to work in real time conditions and with minimal intervention from the operator. Our approach is to create from the original microscopic image a three level image with the following components: epoxy, coal macerals and pyrite to simplify the calculations. Enhancing the original image by histogram scaling and median filtering, we segment it and form the three level image. After the boundaries of the pyrite particles are defined, we mask the surroundings of the particle to estimate the degree of liberation. The percentage of epoxy included in the mask is defined as the degree of liberation of the particle. Size and shape factor values are simultaneously calculated for each of the analyzed particles. These particles are classified according to their maximum diameter, shape factor and degree of liberation by the program. 6 refs., 18 figs.
- Research Organization:
- Pittsburgh Univ., PA (USA). Dept. of Electrical Engineering
- DOE Contract Number:
- FG22-86PC91565
- OSTI ID:
- 5665273
- Report Number(s):
- DOE/PC/91565-2; ON: DE87012690
- Resource Relation:
- Other Information: Paper copy only, copy does not permit microfiche production. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
47 OTHER INSTRUMENTATION
54 ENVIRONMENTAL SCIENCES
COAL
IMAGES
SULFUR CONTENT
PYRITE
PARTICLE SIZE
SHAPE
MEASURING METHODS
AUTOMATION
COAL PREPARATION
CRUSHING
DESULFURIZATION
MICROSCOPY
PROGRESS REPORT
REMOVAL
SAMPLE PREPARATION
SIZING
SULFUR
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
COMMINUTION
DOCUMENT TYPES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
MINERALS
NONMETALS
SIZE
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
010600* - Coal
Lignite
& Peat- Properties & Composition
440300 - Miscellaneous Instruments- (-1989)
500200 - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)