electrode paste for calcium carbide
What are the main production links of electrode paste for calcium carbide?
For manufacturers of electrode paste for calcium carbide, the two most taboo problems are soft and hard electrode breakage, of which soft breakage is more terrible and can easily cause accidents. Hard fracture is caused by insufficient strength of electrode paste for calcium carbide after sintering; soft fracture is the electrode sintering speed is not as fast as the consumption speed, and the lowering is too fast. The electrode is not completely sintered and cannot withstand the stretching and lateral impact of the lower part of the electrode, causing fracture. These two problems are directly related to the performance of the carbon manufacturer’s electrode paste for calcium carbide, and are also related to the operation during use.
There are only two main steps in the production of electrode paste for calcium carbide, namely, ingredients and kneading. Among them, the kneading is basically the same at present, as long as the kneading equipment is a regular equipment (the above intermittent double-shaft kneading pot), the kneading temperature and time can be controlled in the process.
At present, the main problem that plagues manufacturers is that the roasting speed of electrode paste for calcium carbide is too slow, so some manufacturers adopt methods to reduce the amount of asphalt used. This method is effective to a certain extent, but the low amount of pitch causes the fluidity of the electrode paste for calcium carbide to deteriorate, and the electrode paste for calcium carbide is not easy to be filled in the electrode barrel. The poor density after sintering is likely to cause hard fracture. In addition, One method is to reduce the softening point of the pitch and increase the sintering speed of the electrode. However, the softening point of the pitch cannot be reduced indefinitely. Because the pitch with a too low softening point reduces the coking rate of the pitch, the strength of the electrode should also be reduced. Hard break phenomenon.
Therefore, in the production of electrode paste for calcium carbide, in addition to properly mastering the above two methods, it is also necessary to increase the sintering speed of the electrode through the adjustment of the formula. For example, appropriately increase the graphite material with good conductivity and heat transfer performance in the formula. Increasing the conduction heat of the electrode from the furnace to speed up the firing speed, while trying to reduce the consumption of the electrode to reduce the speed of the electrode lowering can also achieve the matching of electrode consumption and firing.