electrode paste for ferro-alloy furnace
For manufacturers using electrode paste for ferro-alloy furnace, the two most taboo problems are soft and hard electrode breakage, of which soft breakage is more terrifying and is likely to cause accidents. Hard fracture is caused by insufficient strength after sintering of the electrode paste for ferro-alloy furnace; soft fracture is that 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 tension and lateral impact of the lower electrode, causing fracture. These two problems are directly related to the performance of the carbon manufacturer’s electrode paste for ferro-alloy furnace, and are also related to the operation during use.
There are only two main links in the production of electrode paste for ferro-alloy furnace, namely batching and mixing. 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 the electrode paste for ferro-alloy furnace 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 ferro-alloy furnace to deteriorate, and the electrode paste for ferro-alloy furnace is not easy to be filled in the electrode barrel, and the density is poor after sintering. For hard fracture, another 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 and the strength of the electrode. , There is still a hard break phenomenon.
Therefore, in the production of electrode paste for ferro-alloy furnace, 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, such as appropriately adding graphite raw materials with good conductivity and heat transfer performance in the formula. , To increase the conduction heat of the electrode from the furnace to speed up the firing speed, and at the same time try 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. It is also possible to add certain additives to the asphalt, which also has a certain effect.