摘要
Laboratory-scale carbon anodes were produced by a new method of high temperature mould pressing, and their physico-chemical properties were studied. The influence of mould pressing conditions and coal pitch addition on the bulk density, crushing strength, and oxidation resistance was analyzed. The mierostructure of carbon anodes was investigated by scanning electron microscopy （SEM）, and the mechanism of producing carbon anodes by high-temperature mould pressing was analyzed. The results show that when the anodes are produced by high-temperature mould pressing, coal pitch can expand into the coke particles and fill the pores inside the particles, which is beneficial for improving the quality of prebaked anodes. The bulk density of carbon anodes is 1.64-1.66 g/cm3, which is 0.08-0.12 g/cm3 higher than that of industrial anodes, and the oxidation resistance of carbon anodes is also significantly improved.
采用热模模压法制备铝电解阳极炭块，并对制取的阳极炭块的物理化学性能进行测试。研究模压工艺和沥青添加量对预焙阳极炭块体积密度、抗压强度和抗氧化性的影响。采用扫描电镜对炭块的微观结构进行分析，对热模模压生产阳极炭块的机理进行探讨。结果表明：采用热模模压法生产炭阳极可使沥青进入石油焦颗粒的内部，并填充石油焦颗粒内部的气孔，从而减少预焙阳极炭块的气孔率，提高其密度。采用热模模压生产的预焙阳极炭块的体积密度为1．64～1．66g／cm3，比工业阳极炭块的体积密度增加0．08～0．12g／cm3，同时其抗氧化性能也获得妨大的辑高．
基金
Project(090302012)supported by the Fundamental Research Funds for the Central Universities,China
Project(50934005)supported by the National Natural Science Foundation of China
