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Study on the Dissolution of Alumina in Cryolite Electrolyte Using the See-Through Cell

机译：用渗透细胞溶解氧化铝电解质中氧化铝的研究

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By using the see-through cell, the dissolution phenomenon of alumina in the cryolite electrolyte was clearly visible. In this paper, the dissolution processes of primary and secondary alumina in typical aluminum bath were shown and the dissolution rates were compared as well as the temperature fluctuations during dissolution. Both the video and temperature measurements confirm the three key steps of the dissolution process: fast dissolution upon feeding, crust formation and sludge dissolution. And the dissolution rate in each step is very different. Secondary alumina displays a quite different dissolution behavior from primary alumina. Meanwhile, the dissolution rate of secondary alumina is much faster than that of primary alumina. The mechanism for alumina dissolution under the influences of MOI, LOI, surface area, absorbed fluorine and carbon content was also discussed.
机译：通过使用透视细胞，可以清楚地看到晶粒电解质中氧化铝的溶解现象。本文示出了典型铝浴中初级和仲氧化铝的溶出过程，并比较了溶解率以及溶解期间的温度波动。视频和温度测量都确认了溶出过程的三个关键步骤：进料，地壳形成和污泥溶解时快速溶解。并且每个步骤中的溶解速率非常不同。二次氧化铝从原发性氧化铝显示出相当不同的溶解行为。同时，二级氧化铝的溶出速率比原发性氧化铝的溶出速率快得多。还讨论了MOI，LOI，表面积，吸收氟和碳含量的影响下的氧化铝溶解的机制。

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