Performance of binder pitches with decreased QI-content in anode making formation - nature - properties and substitution of quinoline insolubles

Abstract

Five different kinds of quinoline insolubles in binder pitches were investigated concerning their influence on the performance in anode making: - primary QI - secondary QI - coal/coke breeze - carbon black - and ash Experimental and commercial pitches were fully characterized using conventional anode binder specification tests and some additional tests including wetting behaviour, mesophase content and inorganic material. Bench-scale test anodes were produced using a prebaked type anode formulation with petroleum coke. Their chemical, electrical and mechanical properties were measured. The results indicate that binder pitches with 6 - 8.5% QI can provide optimum wetting properties and thus can be used to produce baked carbons of high performance.