Key points of use and production of electrode paste
Electrode paste can be said to be a product with simple technology and complex technology in carbon production.
First, because the electrode paste is the finished product after kneading and forming. Unlike other carbon and graphite products, when defects occur in the previous process, they can be compensated by roasting, graphitization or even impregnation.The second is that the electrode paste is directly facing the user, and the electrode is formed through the process after the user's use process is completed to perform the function of carbon products. However, the electrode paste users vary widely, with different furnace types, different production products, different regions, different environments, different seasons, and different technical levels of operators.The so-called: It is difficult to adjust to the public. It is difficult for electrode paste manufacturers to adapt to such complex conditions of use. Therefore, the production process of electrode paste seems to be relatively simple, but it requires special experience and technology to produce good ones. Experience and technology.
Use of electrode paste:
Electrode paste is also called self-roasting electrode. It relies on the heat in the mine heat furnace to complete the roasting. Therefore, matching the consumption speed of the electrode with the roasting speed is the key to the use of electrode paste. Due to the development of mine heat furnace technology, it is gradually developing in the direction of large-scale and airtight. During the roasting process, the more heat conduction and radiant heat obtained by the open furnace type in the past are reduced. There is only one kind of heat conduction, so the heat obtained by the electrode from the furnace is greatly reduced, which requires improving the sintering performance of the electrode paste to make up for this deficiency.
For manufacturers of electrode paste, the two most taboo problems are soft electrode breakage and hard electrode breakage. Among them, soft breakage is more terrifying and can easily cause accidents.Hard breaking is caused by insufficient strength of the electrode paste after sintering; soft breaking is caused by the electrode sintering speed is not as fast as the consumption speed, the sintering is too fast, and the electrode is not completely sintered and cannot withstand the stretching and lateral impact of the lower part of the electrode, resulting in fracture.These two problems are directly related to the performance of the electrode paste of carbon manufacturers and are also related to the operation during use.There are only two main links in the production of electrode paste, namely batching and kneading.Among them, the kneading is basically the same at present, as long as the kneading equipment is regular equipment (intermittent biaxial kneading pot above 2000L), the mixing temperature and time can be grasped in the process.The key to ingredients is a reasonable formula; the choice of raw materials, particle size ratio, and especially important is the softening point of the binder asphalt and the amount of binder used.
At present, the main problem plaguing manufacturers is that the roasting speed of electrode paste is too slow, so some manufacturers use methods to reduce the amount of asphalt used.This method is effective to a certain extent, but the amount of asphalt is too low to cause the fluidity of the electrode paste to deteriorate, the electrode paste is not easy to enrich in the electrode cylinder, and the poor compactness after sintering can easily cause hard breakage. Another method is to reduce the softening point of the asphalt and increase the sintering speed of the electrode, but the softening point of the asphalt can not be reduced indefinitely, because the asphalt with a low softening point reduces the coking rate of the asphalt, and the strength of the electrode must also be reduced, and the hard phenomenon still occurs. Therefore, in addition to properly mastering the above two methods, the production of electrode paste must also be adjusted through the formula to increase the sintering speed of the electrode. As in the formula Appropriately increase the graphite raw materials with good electrical conductivity and heat transfer properties to increase the heat conduction obtained by the electrodes from the furnace, in order to speed up the roasting speed. When necessary, try to reduce the consumption of the electrodes to reduce the speed at which the electrodes are lowered. The matching of electrode consumption and roasting can also be achieved.Therefore, the production of electrode paste should be medicated, multi-pronged, comprehensive consideration, appropriate, and complementary advantages in order to produce good products and achieve user satisfaction.
