Investigation of a closed two-level system for coal crushing
Nippon Steel Corporation has developed and tested a CPC process under industrial conditions at the Hirohata Plant for preparing a damp charge containing petrographic nonhomogeneous coals for coking. Two sieving levels (''crushing-sieving'') with an enclosed contour are used in this process. The effectiveness of the system is ensured due to an improvement in the firm construction of the vertical vibrating centrifugal screen. Preliminary experiments established that coal containing reactive (fusible) petrographic microcomponents must be crushed to the optimum grain size of 5 mm, while coal with microcomponents of the inertinite group or with lean components must be crushed to 2 mm. (A size of 2.5-3.0 mm was chosen to ensure the effectiveness of the screening.) The ratio between the fusible and lean components was equalized using specific coal charge classes (based on size). The stress in the charge being coked was lessened, and a smaller number of fissures were produced. The coke produced had a more equal pore distribution and a greater structural strength.
- OSTI ID:
- 6362441
- Journal Information:
- Coke Chem. USSR (Engl. Transl.); (United States), Journal Name: Coke Chem. USSR (Engl. Transl.); (United States) Vol. 1; ISSN COKCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010401 -- Coal & Coal Products-- Carbonization-- (-1987)
013000* -- Coal
Lignite
& Peat-- Transport
Handling
& Storage
ASIA
CARBONACEOUS MATERIALS
CARBONIZATION
CHEMICAL REACTIONS
COAL
COAL PREPARATION PLANTS
COKE
COKE OVENS
COKING
COMMINUTION
CRUSHING
DECOMPOSITION
ENERGY SOURCES
EQUIPMENT
FOSSIL FUELS
FUELS
INDUSTRIAL PLANTS
JAPAN
MATERIALS
MECHANICAL PROPERTIES
PARTICLE SIZE CLASSIFIERS
PULVERIZERS
SCREENS