Introduction to the use of electrode production and production points
1. The use of electrode production: Electrode production is also called self-baking electrode. It relies on the heat in the submerged arc furnace to complete the roasting. Therefore, matching the electrode consumption speed with the roasting speed is the key to the use of electrode production. The development of 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 by the open furnace type in the past are only conductive heat, so the electrode is obtained from the furnace The heat is greatly reduced, which requires the improvement of the sintering performance of electrode production to make up for this deficiency.
For manufacturers using electrode production, the two most taboo problems are soft and hard electrode breakage. Soft breakage is more terrifying and can easily cause accidents. Hard fracture is caused by insufficient strength after electrode production is sintered; 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 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 production, and are also related to the operation during use. There are only two main links in the production of electrode production, namely batching and kneading. Among them, the kneading is basically the same at present, as long as the kneading equipment is 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 production is too slow, so some manufacturers adopt methods to reduce the amount of asphalt used. This method is effective to a certain extent, but too low asphalt content causes the fluidity of the electrode production to deteriorate, and the electrode production is not easy to be filled in the electrode barrel. After sintering, the density is poor and it is easy to cause hard fracture. Another method is to reduce the asphalt. The softening point of the electrode increases the sintering speed of the electrode, but the softening point of the pitch cannot be reduced indefinitely, because the pitch with a too low softening point reduces the pitch coking rate, and the strength of the electrode is also reduced, or the phenomenon of hard fracture occurs. Therefore, in addition to properly mastering the above two methods in the production of electrode production, the sintering speed of the electrode must be improved through the adjustment of the formula. For example, the graphite material with good conductivity and good heat transfer performance should be appropriately added in the formula to increase the electrode capacity. The conduction heat obtained in the furnace can 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, which can also match the consumption of the electrode and the firing. Graphite raw materials with good electrical conductivity and heat transfer performance can increase the conduction heat of the electrode from the furnace to speed up the firing speed. At the same time, try to reduce the consumption of the electrode to reduce the speed of electrode lowering. It can also match the consumption of the electrode and the firing.
Therefore, the production of electrode production should prescribe medicines, multi-pronged, comprehensive consideration, appropriateness, and complementary advantages in order to produce good products and obtain user satisfaction.
2. Electrode production production introduction: Electrode production can be said to be a product with simple process and complex technology in carbon production. One is because the electrode production is kneaded and formed into a finished product. Unlike other carbon and graphite products, defects in the previous process can be compensated by roasting, graphitization or even impregnation. Secondly, electrode production directly deals with users, and uses electrodes to form electrodes after the user’s use process to perform the functions of carbon products. However, the users of electrode production are very different: different furnace types; different production products; different regions; different environments; different seasons and operators The technical level of the electrode production is also different. The so-called: it is difficult to adjust. It is difficult for an electrode production enterprise to adapt to such complex conditions of use. Therefore, the production process of electrode production seems to be relatively simple. To produce a good one, it needs special Experience and technology.
3. Regarding the fine structure, large size, and isotropic graphite of isostatic pressed graphite, it has its own characteristics and is more different from the traditional “high purity graphite”. For this reason, it should have a simplified professional name. Carbon graphite material There are many naming methods, such as: according to purpose, it can be called: steelmaking electrode, motor brush, graphite for continuous casting, etc.; according to product structure characteristics, news./12/0618/18/ can be called: isotropic graphite , Anisotropic graphite; According to the production process, it can be called: hot extruded graphite, molded graphite; according to performance, it can be called: high-purity graphite, high-density graphite, high-strength graphite, etc. Refer to the general foreign name (such as “Japanese” Equal square graphite), the author believes that: “Isostatic graphite” is more concise and appropriate. And it can express the connotation of the product.