| With the rapid development of aluminum industry， the demand of pre-bakedanodes and the raw materials including petroleum coke and coal tar pitch increase dayby day，which leads to the two raw materials’ price rising. At present, the phenomenonof the decline in the quality of petroleum coke and the environmental pollutionproduced by the in the process of coal tar pitch roasting. As a result, how to improvethe quality of raw materials and use other binder replacing coal tar pitch to preparepre-baked anode with low cost and high performance is urgent in aluminum andcarbon industry.The pre-baked anodes with good properties were prepared successfully by usingcalcined petroleum coke as main raw materials and using phenolic resin and LXreplacing the coal tar pitch in this study. In addition, this article also uses additives tomodify the coal tar pitch. The pre-baked anode samples with excellent properties areprepared successfully with the raw materials of calcined petroleum coke and modifiedcoal tar pitch. Besides, in this study, flake graphite and artificial graphite are added inthe main raw material of calcined petroleum coke which improve the conductivity ofthe sintered samples.The result of experiments shows that the sample which was prepared withcalcined petroleum coke as the main material, coal tar pitch as binder achieves betterperformance, main performance indexes as follows: bulk density is1.54g/cm3,compressive strength is40MPa, volume resistance is65.1μΩ·m, ash content is0.29percent, true density is2.03g/cm3. These main indicators have reached and closed tothe requirements of national announced new standard YS/T285-20012.Using different proportions of three kinds of aluminium oxide, aluminumhydroxide, and aluminum fluoride to modify coal tar pitch, when the additive contentis3%, the fixed carbon content is highest. The sample which was prepared withmodified coal tar pitch has good properties, main performance indexes as follows:bulk density is1.55g/cm3, compressive strength is40.5MPa, volume resistance is69.4μΩ·m, ash content is0.36percent, true density is2.04g/cm3, the oxidation degreeis16.9after900℃calcination. These main indicators have reached and closed totherequirements of national announced new standard YS/T285-20012.Adding graphite in the calcined petroleum coke would improve the conductivity of the sintered samples, while the mechanical properties of the sample could be worseat the same time. The sample F3with2.5wt%graphite A and2.5wt%graphite B hasgood properties, main performance indexes as follows: volume density is1.53g/cm3,compressive strength is33.1MPa, volume resistance is52.8μΩ·m. ash content is0.28percent, true density is2.05g/cm3. |
