Hammer crushers with screens
In recent years, several new coal washers using wet cleaning methods have been commissioned in the Kuzbas. Compared with pneumatic methods, wet cleaning produces concentrates with lower inorganic impurity contents, but their moisture content is increased (by about 2 to 3%). This has an adverse effect on the overall charge moisture content (which increases by 1.0 to 1.5%), the throughput of the hammer crushers and the power consumption at the crushing stage. When the coal is over-moist, it tends to block the crusher gratings; discharge is incomplete and the coal is consequently over-crushed. The yield of fines below 0.5 mm increases; since the proportion of wet-cleaned coal has increased to 75 to 80%, the fines content after crushing has risen by 1.5 to 2.0%, and the bulk density of charge in the coke ovens has decreased correspondingly. The hammer crushers at the Kuznetsk II and SW (KMK) have been modified to improve the size analysis of the charge and attain higher crushing efficiency. The sectional gratings responsible for loss of efficiency were replaced by metal screens with a staggered array of drilled circular apertures.
- OSTI ID:
- 6220833
- Journal Information:
- Coke Chem. USSR (Engl. Transl.); (United States), Vol. 2; Other Information: Translated from Koks Khim.; No. 2, 36-37(1979)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Industrial equipment for selective charge crushing
Improving the scheme for final comminution of the coal charge
Related Subjects
COAL
CRUSHING
COAL PREPARATION
COKING PLANTS
DENSITY
ENERGY CONSUMPTION
SCREENS
USSR
ASIA
CARBONACEOUS MATERIALS
COMMINUTION
EASTERN EUROPE
ENERGY SOURCES
EUROPE
FOSSIL FUELS
FUELS
INDUSTRIAL PLANTS
MATERIALS
PHYSICAL PROPERTIES
010401* - Coal & Coal Products- Carbonization- (-1987)
013000 - Coal
Lignite
& Peat- Transport
Handling
& Storage