Effect of the petrographic composition of coal charges on the reaction capacity of the coke
It is well known that the reaction capacity of coke depends on the rank and petrogrphic composition of the coal. However, the effect of the degree of petrographic nonuniformity of coal charges on the indicated coke property has not yet been adequately explained. This is of particular importance for coking plants in the East, where in recent years there has been a significant increase in the petrographic nonuniformity of the coal charges, both with regard to rank and petrographic composition. We attempted to relate the physicochemical properties of coke to the petrographic parameters of Kuznetsk coal charges. As the principal parameters of the charge properties we chose the mean reflectance R/sub c/ and the leaning index I, which largely determine the physical and mechanical properties of the coke. The leaning index is presented here as a complex index considering the petrographic composition of the charges and the capacity of the caking components for accepting leaning components with consideration of the degree of reduction. It was found that: (1) The reaction capacity of coke is not dependent only on the principal petrographic parameters of the coal charge properties - the mean value of the vitrinite reflectance index and the leaning index - but on the degree of difference of the coal types in the charge by rank and petrographic composition. (2) With an increase in the petrographic nonuniformity of coal charges there is a decrease in the degree of ordering of the fine structure of the coke: the interplanar distance increases and there is a decrease in the mean dimensions of the carbon blocks. (3) In predicting the physicochemical properties of coke one must consider the petrographic characteristics of the charge.
- OSTI ID:
- 6358492
- Journal Information:
- Coke Chem. USSR (Engl. Transl.); (United States), Vol. 10; Other Information: Translated from Koks Khim.; No. 10, 26-28(1981)
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
PETROGRAPHY
COKE
CHEMICAL REACTION KINETICS
COAL RANK
COKING
REFLECTIVITY
USSR
ASIA
CARBONACEOUS MATERIALS
CARBONIZATION
CHEMICAL REACTIONS
DECOMPOSITION
EASTERN EUROPE
ENERGY SOURCES
EUROPE
FOSSIL FUELS
FUELS
KINETICS
MATERIALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
REACTION KINETICS
SURFACE PROPERTIES
010401* - Coal & Coal Products- Carbonization- (-1987)
010600 - Coal
Lignite
& Peat- Properties & Composition