优质无炭渣阳极生产技术的应用

Application of Quality Carbon-Dross-Free Anode Production Technology

炭渣量是反应预焙阳极使用性能的重要指标。炭渣产生与阳极质量波动和铝电解操作不规范有关。影响阳极质量的因素较多,包括原料质量、原料配方、生产工艺等。本文从阳极生产原料制备、成型工艺改进、焙烧工艺操作等方面对无炭渣阳极生产技术进行了实践,采用混配技术处理骨料煅后焦;控制黏结剂煤沥青储存温度,并通过混合不同品质沥青来均化组分和微量元素含量;采取先进的残极清理技术处理残阳极;改进和优化阳极生块成型工艺、焙烧工艺,处理阳极表面等。最终,阳极质量逐步提升,炭渣量持续减少。

The amount of carbon dross is an important index of the performance of reactive pre-baked anode in aluminum electrolysis. The generation of carbon dross and quality fluctuation of anode are related to the non-standard operation of aluminum electrolysis. There are many factors affecting the quality of anode, including the quality of raw material, the formula of raw materials, the production process and so on. This paper introduced the practice of the carbon-dross-free anode production technology in the aspects of anode production raw material preparation, forming process improvement, roasting process operation. Processing aggregate calcined coke is prepared by mixing technology;the storage temperature of binder coal tar pitch should be controlled, and the content of components and trace elements should be homogenized by mixing different quality asphalt, and the residual anode should be treated by advanced residual anode cleaning technology;the anode block forming process and the roasting process were optimized;the anode surface was treated. Finally, the anode quality was gradually improved and the amount of carbon slag was continuously reduced.