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首页> 外文会议>Annual Meeting Exhibition of The Minerals, Metals Materials Society >Validation of the Gravimetric Method to Properly Follow Alumina Dissolution in Cryolitic Bath
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Validation of the Gravimetric Method to Properly Follow Alumina Dissolution in Cryolitic Bath

机译：验证重量法正确遵循氧化铝溶解在低温浴中

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Alumina dissolution is now one of the greatest concerns about Hall-Heroult process optimization. To tackle alumina dissolution kinetics, a gravimetric method was developed. This method follows the apparent weight of an alumina sample while immersed in a cryolitic bath. Then, from the weight over time curve, it is possible to identify the forces acting on the sample especially the change of gravity and buoyancy forces. The experimental results obtained by this method were compared to four other values: namely the data found in the literature, values computed with a CFD model, the total mass loss of alumina disc samples over time and finally to a sample boundary displacement method. The boundary displacement and the CFD model have also demonstrated the strong dependence of the dissolution rate on the convection pattern around the sample.
机译：氧化铝溶解现在是关于霍尔 - 富尔特流程优化的最大问题之一。为了解决氧化铝溶解动力学，开发了一种重量法。该方法遵循氧化铝样品的表观重量，同时浸入低温浴中。然后，从重量随时间曲线，可以识别作用在样品上的力，尤其是重力和浮力力的变化。通过该方法获得的实验结果与四个其他值进行比较：即文献中发现的数据，用CFD模型计算的值，随着时间的推移，氧化铝盘样品的总质量损失，最后是样品边界位移方法。边界位移和CFD模型还表明了溶出速率对样品周围对流模式的强依赖性。

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