炭阴极材料在操作温度下的实验室试验

LABORATORY TESTING OF CARBON CATHODE MATERIALS AT OPERATONAL TEMPERATURES

深入了解阴极炭材料在实际预热、起动和电解条件下的各项性质是十分重要的。为此,我们改进了在温升下的几项试验方法,它们作为设计工具。对控制材料的质量来说非常重要。1)钠渗透引起的膨胀;2)钠渗透的速度;3)对钠的化学耐性;4)电解过程中的抗磨性;5)热膨胀/收缩;6)热导率。不同试验方法的相关性作为熔炉质量保证系统的一部分也加以讨论。

It is important to have a good understanding of materials properties of cathode carbon under actual preheating, start-up and electrolysis conditions.Towards this goal we have adapted,improved or developed the following test methods at elevated temperatures which we consider as design tools as well as quality control of the materials.1) Expansion due to sodium penetration. 2) Rate of sodium penetration. 3)Chemical resistance towards sodium. 4) Abrasion resistance during electrolysis. 5) Themal expansion/contraction. 6)Thermal conductivity. The relevance of different test methods as a part of a smelter quality assurance system is discussed.