Conditions determining the possibility of the use of high-speed machines for molding coals in a plastic state
High speed pressing and its attendant time advantages are largely governed by the quality of the coal, the pressure requirement, isothermal residence before pressing and the required end strength. Increasing the pressing pressure not only raises end strength as a result of comprehensive caking action but also extends the range of strength within the capacity of a charge of given compilation; it also reduces the pressing time without detracting from end quality. Isothermal residence is critical as it determines the forming behaviour of the coal and the coke quality variation limits. In a typical case, extension of residence from 20 to 60 seconds enabled a gas coal to be formed satisfactorily in a 0.15s press routine at the moderate pressure of 1-2 MPa, giving a double strength product.
- OSTI ID:
- 5508609
- Journal Information:
- Coke Chem. USSR (Engl. Transl.); (United States), Vol. 3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
COMPACTORS
FORMED COKE PROCESSES
PRESSURE EFFECTS
TIME DEPENDENCE
COKE
COKING
ISOTHERMAL PROCESSES
MECHANICAL PROPERTIES
MIXTURES
PRESSING
QUALITY CONTROL
CARBONACEOUS MATERIALS
CARBONIZATION
CHEMICAL REACTIONS
CONTROL
DECOMPOSITION
DISPERSIONS
ENERGY SOURCES
FABRICATION
FOSSIL FUELS
FUELS
MATERIALS
MATERIALS WORKING
010401* - Coal & Coal Products- Carbonization- (-1987)
013000 - Coal
Lignite
& Peat- Transport
Handling
& Storage