论文部分内容阅读
６０ｋＡ侧插自焙铝电解槽采用了烟气干法净化技术，净化后的氧化铝物理－化学性质发生了显著变化。氧化铝内含氟为０．８３～１．４３％，游离碳２％左右，焦油０．９％左右，ＳｉＯ２和Ｐ２Ｏ５分别增加２倍，Ｆｅ２Ｏ３和Ｖ２Ｏ５均增加了４倍，灼减提高２％左右；中间型氧化铝的粒度破损严重，－３２０目细粉增加４５．６％，比表面积大幅度下降，αＡｌ２Ｏ３含量显著增加。载氟氧化铝在电解质中溶解速度降低．结壳特性变差。氧化铝的这些物理化学性质的改变均对铝电解生产工艺有不利影响。
60kA side-inserted self-baking aluminum electrolytic cell with a dry flue gas purification technology, purified alumina physical-chemical properties have undergone significant changes. Alumina contains 0.83-1.43% of fluorine, about 2% of free carbon and about 0.9% of tar, with SiO2 and P2O5 increasing by 2 times, Fe2O3 and V2O5 by 4 times, and burning reduction by 2% ; The size of the intermediate alumina was severely damaged, the content of -320 mesh powder increased by 45.6%, the specific surface area decreased greatly and the content of αAl2O3 increased significantly. Aluminum fluoride contained in the electrolyte dissolution rate decreased. Crusty properties deteriorate. These changes in physicochemical properties of alumina all have a detrimental effect on the production process of aluminum electrolysis.