Study of the plastic layer
The carbonisation of a coal blend in an industrial coke oven is a highly heterogeneous process. Thermal gradients induce three zones coexisting in the chamber: the coke, the plastic layer and the coal. In the intermediate zone, coal grains soften and swell, giving a complex solid- liquid-gas medium. Most of the final product properties are determined at this stage of the carbonisation, e.g. abrasion resistance of the coke and its optical texture and porosity. From the point of view of the coking process, an understanding of the physico-chemical phenomena occurring in the plastic layer is requested, in order to ensure safe operation of the oven. In particular, it is suspected that high wall pressures developed by some high rank coals result from the equilibria characterising the plastic layer of this coal. The plastic layer is investigated using different approaches.
Bibliographic Reference: EUR 13441 FR (1991) 121 pp., MF, ECU 8, blow-up copy ECU 11.25
Record Number: 199110997 / Last updated on: 1994-12-02
Original language: fr
Available languages: fr