Factors determining the properties of coal moldings from weakly caking hard coals
An analysis of new processes being developed for the continuous coking of coals with the aim of obtaining shaped coke permits them to be grouped in the following way: processes based on the preliminary thermal preparation of the coals with subsequent molding at the stage of their plastic state, and processes based on preliminary briquetting of the coals with a binder followed by thermal treatment of the coal briquettes. This paper is concerned with a new method for the production of shaped coke from brown coals in which briquetting is carried out without binders followed by the calcination of the briquettes. Experimental data are presented which demonstrate that there is a possibility, by selecting the optimum sieve composition of the coal mixture before molding and the optimum molding pressure, and somewhat changing the properties of the surface of the coal particles in the direction of increasing their hydrophobicity with a simultaneous increase in the specific surface. In this way the coal briquets as well as the coke breiquets obtained from them will have higher strength and increased usefulness in industrial pplications. 7 references.s on industrial applications.
- OSTI ID:
- 5427516
- Journal Information:
- Solid Fuel Chem. (Engl. Transl.); (United States), Vol. 15:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BROWN COAL
BRIQUETTING
CALCINATION
COKING
BRIQUETS
COKE
FORMED COKE PROCESSES
CARBONACEOUS MATERIALS
CARBONIZATION
CHEMICAL REACTIONS
COAL
DECOMPOSITION
ENERGY SOURCES
FABRICATION
FOSSIL FUELS
FUELS
MATERIALS
MOLDING
PYROLYSIS
SOLID FUELS
THERMOCHEMICAL PROCESSES
010401* - Coal & Coal Products- Carbonization- (-1987)
013000 - Coal
Lignite
& Peat- Transport
Handling
& Storage