Improving the scheme for final comminution of the coal charge
Proceeding from laboratory and pilot plant tests of the screening of fine classes of coal under the effect of gravitational forces on stationary grates, and also from the experience of the Krivoi Rog and Kommunarsk Coke Works (1,2), the coal preparation division of OKhMK (Orsk-Khalilovo Integrated Iron and Steel Works) adopted an industrial scheme of comminution of coal before coking, screening out the fine classes ahead of the hammer crushers. In the bottom of the feeder chute a stamped screen was installed (dimensions 2100 X 1600 X 5 mm with apertures of 40 X 100 mm) with the large side perpendicular to the flow of coal. The distance between the apertures on the small side of the screen was 20 mm, on the large side 15 mm; the inclination was 60/sup 0/. The overscreen product enters the crusher, and the underscreen product is injected into the crushed charge without comminution. The improvement in the uniformity of the granulometric and qualitative composition of the prepared charge resulted in an improvement in the physicomechanical properties of the blast furnace coke. The mechanical strength of the coke by the M/sub 25/ index rose from 86.4 to 86.6%, while the abradability by the M/sub 10/ index decreased from 7.5 to 7.3%.
- Research Organization:
- OKhMK
- OSTI ID:
- 7153486
- Journal Information:
- Coke Chem. USSR (Engl. Transl.); (United States), Vol. 4; Other Information: Translated from Koks i Khimiya, no. 4, 1983
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
COMMINUTION
SCREENS
SORTING
COKE
MECHANICAL PROPERTIES
PHYSICAL PROPERTIES
PROCESS CONTROL
DIMENSIONS
INCLINATION
APERTURES
BLAST FURNACES
COAL FINES
COAL PREPARATION
COKING
FILTRATION
GRANULAR MATERIALS
GRAVITATION
OPTIMIZATION
PARTICLE SIZE
CARBONACEOUS MATERIALS
CARBONIZATION
CHEMICAL REACTIONS
CONTROL
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
FURNACES
MATERIALS
OPENINGS
SEPARATION PROCESSES
SIZE
013000* - Coal
Lignite
& Peat- Transport
Handling
& Storage