Iron smelting with formed coke in the USSR and other countries
Almost every method proposes the production of formed coke by briquetting the coals with binders in the cold state, i.e., at ca. 90/sup 0/C, and then carbonizing the green briquettes. Without considering the details of these methods (FMC, JCEM, HBNPC, DKS, and others), it can be accepted that the production of strong formed coke by cold briquetting requires high moulding pressures (hundreds or even thousands of atmospheres); it consumes large amounts of very scarce binders and needs extreme care in the carbonizing cycle, since the briquettes go through a softening stage and are easily damaged. Although these disadvantages are appreciated, the prospect of using large amounts of plentiful coals has led to continued development work. The most promising alternative is not briquetting, as a means of using the natural plastic properties of caking coals to form the coke briquettes. Methods based on this principle have been developed in the FRG (BFL and Ansit) and Japan (the Mineral Resources Institute method). The properties of various types of formed coke which have been subjected to blast-furnace trials are listed. The trial results on Soviet formed coke have been widely publicized. The trials lasted longer and used sufficient coke to be more representative than trials elsewhere; they clearly demonstrated the merits of the formed coke production process developed in the USSR. Although all the types of formed coke considered above have a high mechanical strength at room temperature, only that made by the Soviet process retains a high abrasion resistance when heated in the blast furnace and accordingly keeps the burden permeability high.
- OSTI ID:
- 5632054
- Journal Information:
- Coke Chem., USSR (Engl. Transl.); (United States), Journal Name: Coke Chem., USSR (Engl. Transl.); (United States) Vol. 11; ISSN COKCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010404* -- Coal
Lignite
& Peat-- Gasification
010600 -- Coal
Lignite
& Peat-- Properties & Composition
ASIA
BLAST FURNACES
CHEMICAL REACTION KINETICS
COKE
COMPARATIVE EVALUATIONS
EUROPE
FORMED COKE PROCESSES
FURNACES
KINETICS
MECHANICAL PROPERTIES
REACTION KINETICS
TEMPERATURE DEPENDENCE
USSR