| abstract |
Form or pressed bodies, such as briquettes, are made of a mixture including at least two components. A first component is formed by at least one fine grained solid material which does not soften below 800° C. A second component is formed by at least one binding agent that is pyrolytically decomposable. Each of the components has a mean mixing and deformation temperature such that the mean temperature of the first component is above a standard mixing and deforming temperature while the mean temperature of the second component is below the standard temperature. The standard temperature is such that a pyrolysis and degassing performed at the standard temperature does not destroy the binding ability of the second component. The second component constitutes about 15% by weight to about 50% by weight of the total mixture. Further, the second component is at least partly a liquified bituminous material having a mean CCT-value above 20%. With these conditions satisfied, it is assured that solid, heat resistant, carbon containing form bodies can be made of the so prepared mixture without requiring the use of baking hard or bituminous coal and without the need for an expensive follow-up coking. The mixture is continuously maintained in motion while it is being subjected to distillation and pyrolysis, whereby gases are removed from the mixture. As soon as a solidification and coke formation is noticed in the pyrolytically decomposed bituminous material, the form bodies are produced by pressing at temperatures within the range of 460° to 590° C. at conventional pressures. |