论文部分内容阅读
铝电解槽的阳极通常是一整块大碳体,或者是由约40.6×50.8厘米或45.7×76.2厘米的一些碳块组成。由鋼棒将碳与电源接通。这种阳极的电压损失一般为0.3～0.5伏特。雷诺金属公司有一种新式阳极装置,系将一些预焙碳板夹在金属板间加压制成。板—碳接触处的电压降比通常所用的棒—碳接触处的要小得多,可减小0.1～0.2伏特电压。气体容易拂入碳板之间的沟槽中,可防止生成大的气泡。因此,如预焙阳极一样,这种阳极可以更加接近金属的表面,并可采用比连续自焙阳极更高的电流密度进行电解。由于碳板的侧面比较大,故可增大阳极的有效表面,同时使阳极过电压降至最小。鋼板可防止碳板氧化。因此,碳的消耗低于预焙阳极。使用长碳板可以延长阳极的寿命,并兼有连续自焙阳极的某些优点。大电解槽采用的多层板式阳极,一次就可全部换出。
The anode of an aluminum reduction cell is usually a single piece of large carbon or consists of some carbon blocks of about 40.6 x 50.8 cm or 45.7 x 76.2 cm. Carbon steel and power connected by the steel bar. This anode voltage loss is generally 0.3 to 0.5 volts. Renault Metal has a new anode unit that presses some of the pre-baked carbon sheets between metal plates. The voltage drop at the plate-to-carbon contact is much smaller than the bar-to-carbon contact typically used, reducing the voltage by 0.1 to 0.2 volts. The gas flushes easily into the grooves between the carbon plates to prevent the formation of large bubbles. Thus, as in the case of prebaked anodes, such anodes can be brought closer to the surface of the metal and can be electrolyzed at higher current densities than continuous self-baking anodes. Because of the larger side of the carbon plate, it is possible to increase the effective surface of the anode while minimizing the anode overvoltage. Steel plate to prevent carbon oxidation. Therefore, the carbon consumption is lower than that of the prebaked anode. The use of long carbon plates prolongs the life of the anode and has some of the advantages of a continuous self-baking anode. Multi-plate anode with a large electrolytic cell can be changed all at once.