Process and apparatus for producing blast furnace coke by coal compaction
A method is disclosed of producing blast furnace coke by (1) compacting a finely divided coal wherein at least about 60% by weight of the coal has a diameter of less than about 1/8 inch to form a coal compact, which compact immediately after removal from the compacting means comprises at least about 20% by weight of particles having a particle size of less than 1/4 inch in diameter; (2) breaking the thus formed compact such that the bulk density is sufficiently increased to be capable of conversion into coke suitable for use in large blast furnaces upon carbonization thereof; and (3) carbonizing the broken compact to thereby produce blast furnace coke having a minimum hardness of about 68 and a minimum stability of about 55. The compacting is preferably performed at a pressure equivalent to that achieved by passing the finely divided coal between rolls at a pressure applied to the coal of between about 20 and about 60 tons per linear inch. Also preferably in the breaking step at least about 95% of the compacted coal is reduced to particle sizes range from about one inch to less than about 100 mesh. The invention also includes apparatus for carrying out the above -described process.
- Assignee:
- United States Steel Corp
- Patent Number(s):
- US 4186054
- OSTI ID:
- 5779619
- Resource Relation:
- Patent File Date: Filed date 30 Dec 1977; Other Information: PAT-APPL-865818
- Country of Publication:
- United States
- Language:
- English
Similar Records
Process for producing blast furnace grade coke, a distillable product and fuel gases from a heavy, high sulfur, crude oil
Evaluation of Australian coals and cokes for large blast furnaces
Related Subjects
COAL FINES
COMPACTING
COKE
PRODUCTION
BLAST FURNACES
BULK DENSITY
CARBONIZATION
HARDNESS
METALLURGY
PARTICLE SIZE
STABILIZATION
CHEMICAL REACTIONS
DECOMPOSITION
DENSITY
FURNACES
MECHANICAL PROPERTIES
PHYSICAL PROPERTIES
SIZE
010401* - Coal & Coal Products- Carbonization- (-1987)