electrode paste for yellow phosphorus smelting
The electrode paste for yellow phosphorus smelting is also called self-baking electrode. It relies on the heat in the submerged arc furnace to complete the baking. Therefore, matching the consumption speed of the electrode and the baking speed is the key to the use of electrode paste for yellow phosphorus smelting. The development of hot furnace technology has gradually developed towards large-scale and airtight. During the firing process of the electrode, the more conductive heat and the reduction of radiant heat obtained from the open furnace type in the past are only conductive heat. Therefore, the electrode is removed from the furnace. The heat gained is greatly reduced, which requires improving the sintering performance of the electrode paste for yellow phosphorus smelting to make up for this deficiency.
For manufacturers who use electrode paste for yellow phosphorus smelting, the two most taboo problems are soft and hard electrode breaks, of which soft breaks are more terrifying and are prone to accidents. Hard fracture is caused by insufficient strength after sintering of the electrode paste for yellow phosphorus smelting; soft fracture is caused by the electrode sintering speed is not as fast as the consumption speed, and the lowering is too fast. The electrode is not fully sintered and cannot withstand the tension 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 yellow phosphorus smelting, and are also related to the operation during use. There are only two main links in the production of electrode paste for yellow phosphorus smelting, 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. The key to the ingredients is a reasonable formula; the selection of raw materials, the particle size ratio, and the softening point of the binder asphalt and the amount of binder used are especially important. At present, the main problem that plagues manufacturers is that the roasting speed of electrode paste for yellow phosphorus smelting 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 amount of asphalt is too low, which causes the fluidity of the electrode paste for yellow phosphorus smelting to deteriorate. The electrode paste for yellow phosphorus smelting is not easy to be filled in the electrode barrel, and the density after sintering is poor and it is easy to cause 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 of the too low softening point reduces the coking rate of the pitch and the strength of the electrode is also reduced. There will be a hard break phenomenon.
Therefore, in the production of electrode paste for yellow phosphorus smelting, 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. 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. I started to study the production technology of electrode paste for yellow phosphorus smelting in the 1980s, and experimented with the production of electrode paste for yellow phosphorus smelting for the electric nickel furnace of Northwest Jinchang Company. I also added certain additives to the asphalt. effect. After that, he successively developed products for a number of large-scale calcium carbide furnaces and ferroalloy furnaces and gained certain experience. Therefore, the production of Electrode Paste for Yellow Phosphorus smelting can be prescribed to the disease, multi-pronged, comprehensively considered, appropriate, and complementary in order to produce good products and satisfy users.