Pitch insolubles : their nature, properties and substitution
Two examples of low solids by-product tars from modern coke-oven installations have been distilled in the laboratory to produce pitches of properties similar to those of conventional electrode binders, apart from the low contents of quinoline-insoluble matter. Three further pitches were prepared in which the content of quinoline insolubles had been boosted to conventional levels (8 - 12 mass%). These five experimental pitches and seven commercially-produced anode binder pitches were fully characterised using conventional anode binder specification tests and some additional tests including analysis for a wide variety of contaminant elements. Two pilot-scale experimentally produced pitches used in an earlier ECSC research project were also examined. Bench-scale test electrodes were produced from all fourteen pitches using a prebaked-type anode formulation with petroleum coke aggregate obtained from an aluminium producer. The physical and reactivity properties of the test electrodes were measured. The results indicate that low-QI binders prepared from modern coke-oven by-product tars could probably be used to produce baked carbons having satisfactory performance as prebaked anodes for aluminium cells.
Bibliographic Reference: EUR 12079 EN (1989)
Record Number: 198910424 / Last updated on: 1994-12-01
Original language: en
Available languages: en