Lyu Xiaojun

A Modelling of Heat Losses in Aluminium Reduction Cell With Slotted Anodes

The heat losses of aluminium reduction cells depend strongly on the heat transfer coefficients between the bath and side ledge or anodes. Using of anodes with slots can greatly change heat transfer. In order to investigate the heat loss dynamics in reduction cells with slotted anodes, a modeling of heat transfer coefficients in cells was firstly undertook. This enables understanding of how slotted anode changes heat dissipation from the bath. Then, a thermal field was been calculated by using heat transfer coefficients obtained in the first step. All these studies were carried out with 500kA cells.

Effect of LiAlO2 and KF on Physicochemical Properties for Industrial Aluminum Electrolyte

The aluminum electrolytes of 300 kA series cell in a Chinese aluminum plant were investigated. Compositions and physicochemical properties of these electrolyte samples were analyzed, and the effects of contents of additive LiAlO2 and KF on physicochemical properties were studied. The results show that with the increasing content of the LiAlO2 from 0 to 8.52 wt%, the liquidus temperature decreases gradually from 940.7 °C to 917.0 °C, whereas the alumina solubility obtained by oxygen content increases in the initial stage and then reduces. When increasing the content of LiAlO2 up to 3 wt%, the alumina solubility reaches the highest value of 6.44 wt%. The liquidus temperature decreases by 2.3–2.5 °C with per 1 wt% addition of KF, and meanwhile, the alumina solubility increases by 0.05–0.13 wt% correspondingly.