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Preparation method of high-volume-density graphitized cathode carbon block for aluminum electrolysis
The invention discloses a preparation method of a high-volume-density graphitized cathode carbon block for aluminum electrolysis. The method comprises the following steps: after aggregate particles and powder are obtained, adding 78 wt.% of the aggregate particles and powder into a mixing pot to be uniformly mixed, adding 22 wt.% of a binder with the softening point of 105-112 DEG C for wet mixingwith the aggregate particles and the powder, preparing the mixture into a green body, a graphitized roasted blank and a graphitized blank in sequence, and finally processing a graphitized carbon block to obtain the carbon block. With the optimal dry material particle size ratio and binder ratio, the permeation of electrolyte in the prepared cathode carbon block into pores in the surface of the cathode block is obviously reduced, the cathode carbon block has a smaller volume change property in the carbonization and/or graphitization and/or cooling period, the aggregate is fully combined with the powder and the binder, the porosity is obviously reduced, the volume density is obviously improved, and can reach 1.75 g/cm<3> at most, and the erosion resistance and the erosion resistance are better.
本申请公开了一种铝电解用高体密石墨化阴极炭块的制备方法，在得到骨料颗粒及粉料后，就将重量百分比为78％的骨料颗粒和粉料加入混捏锅混均，再加入重量百分比为22％，软化点为105℃‑112℃的粘结剂与骨料颗粒和粉料的混合料进行湿混，接着将混合料先后制成生坯，石墨化焙烧坯及石墨化坯，最后将石墨化炭块加工即得炭块，因使用了最优地干料粒度配比和粘结剂配比，制得的阴极炭块中电解质向阴极块表面孔隙中的渗透是明显减少的，其在碳化和/或石墨化和/或冷却期间具有更小的体积变化性质，骨料与粉料和粘结剂充分结合，孔隙度明显降低，体积密度显著提高，体积密度最高可达到1.75g/cm3，且抗冲刷和耐侵蚀性能均较好。
Preparation method of high-volume-density graphitized cathode carbon block for aluminum electrolysis
The invention discloses a preparation method of a high-volume-density graphitized cathode carbon block for aluminum electrolysis. The method comprises the following steps: after aggregate particles and powder are obtained, adding 78 wt.% of the aggregate particles and powder into a mixing pot to be uniformly mixed, adding 22 wt.% of a binder with the softening point of 105-112 DEG C for wet mixingwith the aggregate particles and the powder, preparing the mixture into a green body, a graphitized roasted blank and a graphitized blank in sequence, and finally processing a graphitized carbon block to obtain the carbon block. With the optimal dry material particle size ratio and binder ratio, the permeation of electrolyte in the prepared cathode carbon block into pores in the surface of the cathode block is obviously reduced, the cathode carbon block has a smaller volume change property in the carbonization and/or graphitization and/or cooling period, the aggregate is fully combined with the powder and the binder, the porosity is obviously reduced, the volume density is obviously improved, and can reach 1.75 g/cm<3> at most, and the erosion resistance and the erosion resistance are better.
本申请公开了一种铝电解用高体密石墨化阴极炭块的制备方法，在得到骨料颗粒及粉料后，就将重量百分比为78％的骨料颗粒和粉料加入混捏锅混均，再加入重量百分比为22％，软化点为105℃‑112℃的粘结剂与骨料颗粒和粉料的混合料进行湿混，接着将混合料先后制成生坯，石墨化焙烧坯及石墨化坯，最后将石墨化炭块加工即得炭块，因使用了最优地干料粒度配比和粘结剂配比，制得的阴极炭块中电解质向阴极块表面孔隙中的渗透是明显减少的，其在碳化和/或石墨化和/或冷却期间具有更小的体积变化性质，骨料与粉料和粘结剂充分结合，孔隙度明显降低，体积密度显著提高，体积密度最高可达到1.75g/cm3，且抗冲刷和耐侵蚀性能均较好。
Preparation method of high-volume-density graphitized cathode carbon block for aluminum electrolysis
一种铝电解用高体密石墨化阴极炭块的制备方法
LIU JIANPING (author) / ZHANG HONGRU (author) / CHEN SHENG (author) / HE SHENGPING (author) / ZHAO QIANG (author) / XIE WENTAO (author) / LUO YONG (author) / FAN YALONG (author) / MA XIAOLONG (author) / SHEN YANG (author)
2021-01-12
Patent
Electronic Resource
Chinese
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